JPH02144147A - Catalyst for removal of nitrogen oxide - Google Patents
Catalyst for removal of nitrogen oxideInfo
- Publication number
- JPH02144147A JPH02144147A JP63298800A JP29880088A JPH02144147A JP H02144147 A JPH02144147 A JP H02144147A JP 63298800 A JP63298800 A JP 63298800A JP 29880088 A JP29880088 A JP 29880088A JP H02144147 A JPH02144147 A JP H02144147A
- Authority
- JP
- Japan
- Prior art keywords
- catalyst
- group
- hours
- dried
- metals
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003054 catalyst Substances 0.000 title claims abstract description 33
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 title claims description 36
- 229910052751 metal Inorganic materials 0.000 claims abstract description 18
- 239000002184 metal Substances 0.000 claims abstract description 18
- 150000002739 metals Chemical class 0.000 claims abstract description 8
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 5
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 4
- 150000004706 metal oxides Chemical class 0.000 claims abstract description 4
- 229910000272 alkali metal oxide Inorganic materials 0.000 claims abstract description 3
- 150000001340 alkali metals Chemical class 0.000 claims abstract description 3
- 229910000287 alkaline earth metal oxide Inorganic materials 0.000 claims abstract description 3
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 3
- 229910052702 rhenium Inorganic materials 0.000 claims abstract description 3
- 229910052703 rhodium Inorganic materials 0.000 claims abstract description 3
- 229910052707 ruthenium Inorganic materials 0.000 claims abstract description 3
- 239000007789 gas Substances 0.000 claims description 7
- 229910052763 palladium Inorganic materials 0.000 claims description 2
- 229910002695 AgAu Inorganic materials 0.000 claims 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 abstract description 12
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 abstract description 10
- YBCAZPLXEGKKFM-UHFFFAOYSA-K ruthenium(iii) chloride Chemical compound [Cl-].[Cl-].[Cl-].[Ru+3] YBCAZPLXEGKKFM-UHFFFAOYSA-K 0.000 abstract description 9
- 239000002243 precursor Substances 0.000 abstract description 7
- 239000003638 chemical reducing agent Substances 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 6
- 229910052709 silver Inorganic materials 0.000 abstract description 2
- 229910052737 gold Inorganic materials 0.000 abstract 1
- 229910052745 lead Inorganic materials 0.000 abstract 1
- 238000000034 method Methods 0.000 description 17
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 12
- 150000003839 salts Chemical class 0.000 description 9
- 239000000203 mixture Substances 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 238000000465 moulding Methods 0.000 description 6
- 239000002002 slurry Substances 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 5
- 239000007864 aqueous solution Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000011068 loading method Methods 0.000 description 5
- 239000010955 niobium Substances 0.000 description 5
- WPCMRGJTLPITMF-UHFFFAOYSA-I niobium(5+);pentahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[Nb+5] WPCMRGJTLPITMF-UHFFFAOYSA-I 0.000 description 5
- 238000009423 ventilation Methods 0.000 description 5
- 238000001035 drying Methods 0.000 description 4
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 229910009973 Ti2O3 Inorganic materials 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- 238000010304 firing Methods 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- GQUJEMVIKWQAEH-UHFFFAOYSA-N titanium(III) oxide Chemical compound O=[Ti]O[Ti]=O GQUJEMVIKWQAEH-UHFFFAOYSA-N 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- IWOUKMZUPDVPGQ-UHFFFAOYSA-N barium nitrate Chemical compound [Ba+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O IWOUKMZUPDVPGQ-UHFFFAOYSA-N 0.000 description 2
- -1 calcilla oxide J1 Chemical compound 0.000 description 2
- YIXJRHPUWRPCBB-UHFFFAOYSA-N magnesium nitrate Chemical compound [Mg+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O YIXJRHPUWRPCBB-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- ZKATWMILCYLAPD-UHFFFAOYSA-N niobium pentoxide Chemical compound O=[Nb](=O)O[Nb](=O)=O ZKATWMILCYLAPD-UHFFFAOYSA-N 0.000 description 2
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 description 2
- DHEQXMRUPNDRPG-UHFFFAOYSA-N strontium nitrate Chemical compound [Sr+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O DHEQXMRUPNDRPG-UHFFFAOYSA-N 0.000 description 2
- IATRAKWUXMZMIY-UHFFFAOYSA-N strontium oxide Chemical compound [O-2].[Sr+2] IATRAKWUXMZMIY-UHFFFAOYSA-N 0.000 description 2
- LLZRNZOLAXHGLL-UHFFFAOYSA-J titanic acid Chemical compound O[Ti](O)(O)O LLZRNZOLAXHGLL-UHFFFAOYSA-J 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- BYFGZMCJNACEKR-UHFFFAOYSA-N Al2O Inorganic materials [Al]O[Al] BYFGZMCJNACEKR-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229910019704 Nb2O Inorganic materials 0.000 description 1
- 229910019714 Nb2O3 Inorganic materials 0.000 description 1
- XZQYTGKSBZGQMO-UHFFFAOYSA-I Rhenium(V) chloride Inorganic materials Cl[Re](Cl)(Cl)(Cl)Cl XZQYTGKSBZGQMO-UHFFFAOYSA-I 0.000 description 1
- 229910021607 Silver chloride Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- RQPZNWPYLFFXCP-UHFFFAOYSA-L barium dihydroxide Chemical compound [OH-].[OH-].[Ba+2] RQPZNWPYLFFXCP-UHFFFAOYSA-L 0.000 description 1
- 229910001863 barium hydroxide Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 238000003421 catalytic decomposition reaction Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 230000005574 cross-species transmission Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- DKAGJZJALZXOOV-UHFFFAOYSA-N hydrate;hydrochloride Chemical class O.Cl DKAGJZJALZXOOV-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- HFLAMWCKUFHSAZ-UHFFFAOYSA-N niobium dioxide Inorganic materials O=[Nb]=O HFLAMWCKUFHSAZ-UHFFFAOYSA-N 0.000 description 1
- 229910000484 niobium oxide Inorganic materials 0.000 description 1
- URLJKFSTXLNXLG-UHFFFAOYSA-N niobium(5+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Nb+5].[Nb+5] URLJKFSTXLNXLG-UHFFFAOYSA-N 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- KDLHZDBZIXYQEI-UHFFFAOYSA-N palladium Substances [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 1
- PIBWKRNGBLPSSY-UHFFFAOYSA-L palladium(II) chloride Chemical compound Cl[Pd]Cl PIBWKRNGBLPSSY-UHFFFAOYSA-L 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 239000010948 rhodium Substances 0.000 description 1
- VXNYVYJABGOSBX-UHFFFAOYSA-N rhodium(3+);trinitrate Chemical compound [Rh+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VXNYVYJABGOSBX-UHFFFAOYSA-N 0.000 description 1
- SONJTKJMTWTJCT-UHFFFAOYSA-K rhodium(iii) chloride Chemical compound [Cl-].[Cl-].[Cl-].[Rh+3] SONJTKJMTWTJCT-UHFFFAOYSA-K 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000010944 silver (metal) Substances 0.000 description 1
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 1
- 229910001961 silver nitrate Inorganic materials 0.000 description 1
- UUCCCPNEFXQJEL-UHFFFAOYSA-L strontium dihydroxide Chemical compound [OH-].[OH-].[Sr+2] UUCCCPNEFXQJEL-UHFFFAOYSA-L 0.000 description 1
- 229910001866 strontium hydroxide Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- UXMRNSHDSCDMLG-UHFFFAOYSA-J tetrachlororhenium Chemical compound Cl[Re](Cl)(Cl)Cl UXMRNSHDSCDMLG-UHFFFAOYSA-J 0.000 description 1
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、排ガス中に含まれる窒素酸化物を除去する方
法に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for removing nitrogen oxides contained in exhaust gas.
Ｃｆ、来の技術）
従来排ガス中に含まれる窒素酸化物は、■窒素酸化物を
酸化しアルカリ吸収させる方法 ■窒素酸化物をＮＨ３
１Ｎ２１ Ｃｏ等の還元剤により、Ｎ２とする方法など
により除去されてきた。これらの方法は■の場合、排水
処理が必要となり、■の場合はＮＨ３等の還元剤が必要
であるため処理コストが高く、特にＮ Ｈ３とＳＯｘと
の反応による塩類生成による活性低下があるなどの問題
を有してきた。またそのため還元剤を添加することなく
窒素酸化物を直接分解することができる触媒が提案され
ているが、これらは活性が低く実用に供し得ないという
問題点を有してきた。Cf, conventional technology) Nitrogen oxides contained in exhaust gas are conventionally treated by: ■ A method of oxidizing nitrogen oxides and absorbing alkali ■ Nitrogen oxides with NH3
It has been removed by reducing agents such as 1N21 Co to N2. These methods require wastewater treatment in case (■), and in case (■) a reducing agent such as NH3 is required, resulting in high treatment costs.In particular, there is a decrease in activity due to the formation of salts due to the reaction between NH3 and SOx. I have had problems with this. For this reason, catalysts that can directly decompose nitrogen oxides without adding a reducing agent have been proposed, but these have had the problem of low activity and cannot be put to practical use.
（発明が解決しようとする問題点）
本発明は、上記の欠点を解決上還元剤を添加することな
く窒素酸化物を高効率に直接分解することができる触媒
にかかるものである。(Problems to be Solved by the Invention) The present invention relates to a catalyst that can directly decompose nitrogen oxides with high efficiency without adding a reducing agent in order to solve the above-mentioned drawbacks.
（問題点を解決するための手段）
本発明にかかる触媒は、排ガス中に含有する窒素酸化物
を
（ａ ） Ｔ ｒ ０２−Ｘ、 Ａ Ｉ ２０３−ｙ
＋ Ｎ ｂ Ｏよ−２から選択される１種以上（ただい
□、ｙ、ｚ ＝０゜０１〜１．０）
（ｂ）Ｐｔ、Ｒｕ、Ｒｅ、Ｒｈ、Ｐｄ、Ａｇ、ＡＵから
選択される１種以上の金属もしくは金属酸化物
あるいはさらに
（Ｃ）アルカリ金属及びもしくはアルカリ土類金属酸化
物を含有する触媒と接触させ、窒素酸化物なＮ２と０２
に分解することができる触媒である。(Means for Solving the Problems) The catalyst according to the present invention converts nitrogen oxides contained in exhaust gas into (a) T r 02-X, A I 203-y
+ N b O yo -2 (Tai □, y, z = 0゜01~1.0) (b) One or more selected from Pt, Ru, Re, Rh, Pd, Ag, AU or (C) an alkali metal and/or alkaline earth metal oxide;
It is a catalyst that can decompose into
本触媒は（ａ）（ｂ）と（Ｃ）から選択される触媒成分
もしくはそれらの前駆体を用いて、公知の方法により調
整することができる。The present catalyst can be prepared by a known method using a catalyst component selected from (a), (b) and (C) or a precursor thereof.
例えば
（１）（ａ）群から選択される酸化物あるいは（ａ）群
から選択される酸化物と（Ｃ）群から選択される酸化物
もしくはその前駆体を予め混合し、任意の成形方法によ
り成形しその後３００℃〜８００℃の温度条件で焼成し
、これを（ｂ）群から選択される金属塩水溶液に浸漬し
乾燥後３００℃〜８００℃の温度条件て焼成する。そら
に必要に応じて還元雰囲気中く例えばＮ２）Ｎ２）Ｎ２
−Ｎ２）て焼成する。この時の還元温度は５００℃以上
であることが好ましい。For example, (1) an oxide selected from group (a) or an oxide selected from group (a) and an oxide selected from group (C) or a precursor thereof are mixed in advance, and then formed by an arbitrary molding method. It is shaped and then fired at a temperature of 300°C to 800°C, immersed in an aqueous solution of a metal salt selected from group (b), dried, and then fired at a temperature of 300°C to 800°C. For example, N2) N2) N2 in a reducing atmosphere as necessary.
-N2). The reduction temperature at this time is preferably 500°C or higher.
（２） （ａ、）群から選択される金属の塩を水など
：’；ｇ ？ｊＪ？’ｌしこれにアルカリ（アンモニア
、水酸化すトリウ五など）など沈殿剤を加え沈殿を生成
し、これを乾燥し、その後３００℃〜８００℃の温度条
件で焼成し粉砕し、任意の成形方法（押出成形、打錠成
形、球状成形なと）により成形し、さらに必要に応じて
３００℃〜８００℃の温度条件で焼成し、これを（ｂ）
群から選択される金属もしくは（ｂ）群から選択されろ
金属と（Ｃ）群の金属塩水溶液に漫消し、乾燥後Ｆ■２
雰囲気下で３００℃〜８００℃の温度条件で焼成する。(2) Salts of metals selected from group (a,), such as water:';g? jJ? Then, a precipitant such as an alkali (ammonia, trihydroxide, etc.) is added to this to form a precipitate, which is dried, then calcined and pulverized at a temperature of 300°C to 800°C, and then formed using any molding method. (b)
Dip in an aqueous solution of a metal selected from the group (b) or a metal salt of the group (C), and after drying F■2
Firing is performed in an atmosphere at a temperature of 300°C to 800°C.
なおこの時の好ましい還元温度は５００°Ｃ以」二であ
る。Note that the preferable reduction temperature at this time is 500°C or higher.
（３）（ａ）群から選択される金属ｊム及び（ｂ）群か
ら選択される金属塩あるいは（ａ）群から選択される金
属塩、（ｂ）群から選択される金属塩及び（ｃ）群から
選択される金属塩を水などに；容解しこれにアルカリ（
アンモニア、水酸化ナトリウムなと）なと沈殿剤を加え
、沈殿を生成し、これを乾燥し、その後３００℃〜８０
０°Ｃの温度条件で焼成する。これを粉砕し任意の成形
方法（押出成形、打錠成形、球状成形なと）により成形
し、さらに３００℃〜８００ ’Ｃ（好ましくは５００
℃以上）で還元雰囲気下（Ｎ２ Ｉ（２もしくは１■
２）てテ完成する。(3) A metal selected from group (a) and a metal salt selected from group (b), or a metal salt selected from group (a), a metal salt selected from group (b), and (c ) group is dissolved in water etc., and then added with an alkali (
Add a precipitant such as ammonia, sodium hydroxide, etc. to form a precipitate, dry this, and then
Fired at a temperature of 0°C. This is crushed, molded by any molding method (extrusion molding, tablet molding, spherical molding, etc.), and further heated to 300°C to 800'C (preferably 500'C)
℃ or higher) under a reducing atmosphere (N2 I (2 or 1
2) Complete the project.
これらの方法は本発明触媒のＵｉｌ’！方法を例示した
ものであり、これに特定されるものではない。These methods are applicable to Uil'! of the catalyst of the present invention. This is an example of the method and is not exclusive.
しかし本発明において最も好ましい方法はＴｌＯ２）Ａ
Ｉ 、０３．Ｎｂ２Ｏ５の前駆体、例えばオルソチタン
酸、水酸化アルミニウムもＬノ＜は水酸化ニオブな比較
的低い温度で焼成し高比表面積のＴｉＯ２）Ａ Ｉ ２
０３もしくはＮｂ、２０５を調製し、これに（ａ）群よ
り選択される金属塩溶液を含浸担持した後３００°Ｃ〜
８００℃にて焼成する。さらにこれをＮ２−Ｎ２もしく
はＮ２の還元雰囲気下で５００℃で焼成することにより
、金属表面上に付着したＦＩ２のＴｌＯ２）Ａ１□Ｏ８
、Ｎｂ２Ｏ，のスピルオーバーによるＴｌＯ２）Ａｌ２
Ｏ３もしくはＮ ｂ ２０１３の還元とその還元物と（
ｂ）群金属とのＳｔｒｏｎｇＭｅｔａｌ−ｓｕｐｐｏｒ
ｔｎｔｅｒａｃｔ ｉ Ｏｎを生成させることである。However, the most preferred method in the present invention is TlO2)A
I, 03. Precursors of Nb2O5, such as orthotitanic acid and aluminum hydroxide, are also niobium hydroxide.They are fired at a relatively low temperature and have a high specific surface area, TiO2)A I2.
After preparing 03 or Nb, 205 and impregnating and supporting it with a metal salt solution selected from group (a), 300 ° C ~
Fire at 800°C. Furthermore, by firing this at 500°C in a reducing atmosphere of N2-N2 or N2, the FI2 TlO2)A1□O8 attached to the metal surface is
, Nb2O, due to spillover of TlO2)Al2
Reduction of O3 or N b 2013 and its reduced product (
b) StrongMetal-support with group metals
The purpose is to generate tnteract i On.
例えば（ａ）群金属がｐｔの時、Ｔｉの場合Ｐｔｎ−（
Ｔｒ ａＯ？）２ｎ 、Ｎｂの場合Ｐｔｎ−（Ｎｂ２０
、−いｎ、ＡＩの場合Ｐｔｎ−Ａｌ２Ｏ。ｎが生成して
いると考えられる。For example, when the (a) group metal is pt, in the case of Ti, Ptn-(
Tr aO? )2n, for Nb, Ptn-(Nb20
, -n, for AI, Ptn-Al2O. It is thought that n is generated.
本発明に用いることができろ（ｂ）群の金属もしくは金
属酸化物とり、では、前駆体を用いることが好ましく塩
化ルテニウム、塩化レニウム、硝酸ロジウム、塩化パラ
ジウム、硝酸銀、塩化白金酸、塩化金酸などの水溶性塩
を挙げることができろ。Among the metals or metal oxides of group (b) that can be used in the present invention, it is preferable to use precursors such as ruthenium chloride, rhenium chloride, rhodium nitrate, palladium chloride, silver nitrate, chloroplatinic acid, chloroauric acid. Can you name any water-soluble salts such as?
また本発明に用いることができる（ａ）群の酸化物は、
酸化チタンの場合アナタース型酸化チタン、ルチル型、
ブルッカイ１型酸化チタンもしくはＴｉＯ，Ｔｉ２Ｏ３
なとの低次酸化物などてあリ、酸化ニオブの場合Ｎ ｂ
２０６もしくはＮｂＯ２）Ｎｂ２Ｏ３、ＮｂＯなどの
低次酸化物などである。酸化アルミの場合α、β、γ型
などのＡｌ２Ｏ３などである。（ａ）群の前駆体は焼成
することにより前述した酸化物になるものであればいず
れのものでもよく、例えば水酸化物塩化物、硝酸塩など
を用いることができる。Further, the oxides of group (a) that can be used in the present invention are:
In the case of titanium oxide, anatase type titanium oxide, rutile type,
Brookkai type 1 titanium oxide or TiO, Ti2O3
In the case of niobium oxide, Nb
206 or NbO2), lower-order oxides such as Nb2O3, and NbO. In the case of aluminum oxide, these include α, β, and γ types of Al2O3. The precursor of group (a) may be any one that becomes the above-mentioned oxide upon firing, and for example, hydroxide chlorides, nitrates, etc. can be used.
本発明に用いることができる（Ｃ）群の金属酸化物は酸
化マグネシウム、酸化カルシラＪ１、酸化ストロンチウ
ムであり、（Ｃ）群の前駆体は水酸化マグネシラノ１、
水酸化カルシウム、水酸化ストロンチウム、水酸化バリ
ウムなとの水酸化物、硝酸マグネシウム、６百酸カルシ
ウム、硝酸ストロンチウム、硝酸バリウムなど水溶性塩
なと−Ｃある。なおこれらの沈殿剤としては炭酸塩ある
いは水酸化ナトリウムなとのアルカリが好ましい。また
これらの成分以外にチタニア、アルミナ、シリカなどの
公知の担体成分、粘土などの成形助剤成分、ガラスセン
イなどの補強剤を添加してもよい。しかしこれらの成分
の給量は触媒成分中の５０％以下とすることが好ましい
。The metal oxides of group (C) that can be used in the present invention are magnesium oxide, calcilla oxide J1, and strontium oxide, and the precursors of group (C) are magnesilano hydroxide 1,
-C includes hydroxides such as calcium hydroxide, strontium hydroxide, and barium hydroxide, and water-soluble salts such as magnesium nitrate, calcium hexahyacate, strontium nitrate, and barium nitrate. As these precipitating agents, carbonates or alkalis such as sodium hydroxide are preferred. In addition to these components, known carrier components such as titania, alumina, and silica, molding aid components such as clay, and reinforcing agents such as glass fiber may be added. However, it is preferable that the amount of these components added be 50% or less of the catalyst components.
本発明ζこかかる触媒は、（ａ）群及び（ｂ）群もしく
は（ａ）群（ｂ）群及び（Ｃ）群とからなることがこれ
らの好ましい組成化は重量比で（ｂ）群：（ａ）群が０
．０１〜１０：９９．９９：９０、より好ましくは０．
１〜５：９９．９〜９５である。また（ｂ）群： （ａ
）群： （Ｃ）群からなる触媒は、好ましい組成化は重
量比で０．０１〜１０：９９〜５０：１〜５０、より好
ましくは０．１〜５：９０〜７５：１０〜２５である。The catalyst of the present invention may be composed of group (a) and group (b) or group (a), group (b), and group (C).The preferred composition of these is group (b) in weight ratio: (a) Group is 0
．． 01-10:99.99:90, more preferably 0.
1-5:99.9-95. Also, group (b): (a
) group: The catalyst consisting of group (C) preferably has a composition in a weight ratio of 0.01 to 10:99 to 50:1 to 50, more preferably 0.1 to 5:90 to 75:10 to 25. be.
本発明者らはＮＯｘの接触分解の素反応が２ＮＯ＋２ｅ
４ ２ＮＯ−（１）
２ＮＯ−→ Ｎ２＋２０− （２）２０−
→ ０２＋２ｅ （３）０２ →
０２↑ （・１）もしくは酸素の共存下
では
０゜＋２ｅ → ２０”−（５）
２ＮＯ＋２０−→ ２ＮＯ丁 （６）２ＮＯ
丁 −＋ Ｎ２＋４０ （７）４０
− ２０２＋４ｅ （８）０゜
→ Ｏ７↑ （９）からなっていると
考えている。しかしこれら（ａ）群（ｂ）群（Ｃ）群の
それぞれの反応への寄与は定かてはないが、これらの原
子比において、最も分解活性を示す結果となった。The present inventors found that the elementary reaction of catalytic decomposition of NOx is 2NO+2e
4 2NO-(1) 2NO-→ N2+20- (2) 20-
→ 02+2e (3)02 →
02↑ (・1) or in the coexistence of oxygen, 0゜+2e → 20”-(5) 2NO+20-→ 2NO (6) 2NO
Ding −+ N2+40 (7) 40
−202+4e (8)0°
→ O7↑ I think it consists of (9). However, although the contribution of each of these groups (a), (b), and (C) to the reaction is unclear, the results showed that the decomposition activity was the highest at these atomic ratios.
本発明の触媒が分解活性を示す温度は１００℃〜８００
℃である。また好ましい温度は２００℃〜５００℃であ
る。この温度において本発明触媒は５Ｖ＝５００〜５０
００におい゛Ｃ使用することがてきる。The temperature at which the catalyst of the present invention exhibits decomposition activity is 100°C to 800°C.
It is ℃. Further, a preferable temperature is 200°C to 500°C. At this temperature, the catalyst of the present invention is 5V=500-50
Can be used in 00.
（発明の効果）
以上の様に本発明によれば（ａ）群及び（ｂ）群あるい
は（ａ）群、（ｂ）群及び（Ｃ）群より選ばれた触媒成
分を含有する触媒を用いることによって、排ガス温度が
１００℃〜８００℃の温度域において窒素酸化物を還元
剤を添加することなく分解除去することが可能となった
のである。(Effects of the Invention) As described above, according to the present invention, a catalyst containing a catalyst component selected from group (a) and group (b) or group (a), group (b), and group (C) is used. This has made it possible to decompose and remove nitrogen oxides in the exhaust gas temperature range of 100°C to 800°C without adding a reducing agent.
以下に実施例とともに参考例を挙げて本発明を説明する
が、本発明はこれらの実施例により何ら限定されるもの
ではない。The present invention will be explained below by giving reference examples together with Examples, but the present invention is not limited to these Examples in any way.
実施例１
四塩化チタン水溶参α（１５０ｇ／込 ａｓ Ｔｌ０
３）ＩＱに充分に撹拌を行いつつＮＨ３ガス吹き込み、
水酸化チタンの沈殿を生成させた。（最終ＰＨ＝８．０
）ろ過後イオン交換水により充分水洗を行い、１００°
Ｃて１８時間乾燥後５００℃、３時間焼成した。この焼
成物をスクリーンが０．５ｍｍφτあるサンプルミルに
て粉砕した。得られた粉体はＸＲＤによればアナタース
型酸化チタンであり、比表面積は６２イ／ｇであった。Example 1 Titanium tetrachloride water-soluble sulfur α (150g/included as Tl0
3) Blow NH3 gas into IQ while stirring thoroughly,
A titanium hydroxide precipitate was formed. (Final pH=8.0
) After filtration, rinse thoroughly with ion-exchanged water and heat to 100°.
After drying at 500° C. for 18 hours, it was fired at 500° C. for 3 hours. This fired product was ground in a sample mill with a screen of 0.5 mmφτ. According to XRD, the obtained powder was anatase type titanium oxide and had a specific surface area of 62 i/g.
この粉砕物を５０ｇ、水２００＋ｎＶ中に投入し充分撹
拌を行ったスラリー中に空隙率８１％、ピッチ４、ｍｍ
のセラミックファイバー製コルゲート状ハニカムを浸漬
し、ＴｌＯ２を該ハニカムに担持した。50g of this pulverized material was poured into water 200+nV and thoroughly stirred into a slurry with a porosity of 81% and a pitch of 4 mm.
A corrugated honeycomb made of ceramic fiber was immersed, and TlO2 was supported on the honeycomb.
その担持率は１５２％てあ・〕た。これを常温通風乾燥
後１００℃、１８時間乾燥した。この乾燥物を塩化ルテ
ニウム水溶液（Ｒｕとして１０ｇ／Ｑ）中に浸漬し、常
温通風乾燥１ぐ１００℃、１８時間乾燥し、４００℃、
３時間焼成した。The interest rate was 152%. This was air-dried at room temperature and then dried at 100° C. for 18 hours. This dried product was immersed in a ruthenium chloride aqueous solution (10 g/Q as Ru), dried with ventilation at room temperature, 100°C for 18 hours, 400°C,
It was baked for 3 hours.
実施例２
実施例１と同様にしてＴｉＯ□担持コルゲートハニカム
を塩化パラジウム水ｔｕｆｆ（Ｐｄとして１０ｇ／見）
中に浸漬した。これを常温通風乾燥後１８０℃、１８時
間乾燥し４００℃、３時間焼成した。その後この焼成物
を還元炉にセットし貫通孔の中にＨ２を流通させ５５０
℃×２時間還元処理を行った。Example 2 In the same manner as in Example 1, TiO
immersed in it. This was air-dried at room temperature, dried at 180°C for 18 hours, and fired at 400°C for 3 hours. After that, this fired product was set in a reduction furnace, and H2 was passed through the through hole for 550 min.
Reduction treatment was performed at °C for 2 hours.
以下実施例１と同様にした。Ｈ２を用いたＴＰＲ法によ
れば化学組成はＴ 、 Ｉ Ｏ１，−ｒ５てあった。The following procedure was carried out in the same manner as in Example 1. According to the TPR method using H2, the chemical composition was T, IO1, -r5.
実施例３
三菱金属製チタンブラック１０５（化学組成Ｔｉ０）５
０ｇを水５０献中に投入し、充分撹拌を行ったスラリー
中に浸漬しＴｉＯを担持したコルゲート状ハニカムを得
た。これを常温通風乾燥後１００℃、１８時間乾燥した
。この時担持率は１３３％であった。この乾燥物を塩化
ルテニウム水溶液（ＲＩ４として１０ｇ／見）中に浸漬
し常温通風乾燥後３００℃×２時間焼成した。Example 3 Mitsubishi Metals Titanium Black 105 (chemical composition Ti0) 5
A corrugated honeycomb carrying TiO was obtained by adding 0 g of TiO into 50 drops of water and immersing it in the thoroughly stirred slurry. This was air-dried at room temperature and then dried at 100° C. for 18 hours. At this time, the loading rate was 133%. This dried material was immersed in an aqueous ruthenium chloride solution (10 g/sume as RI4), dried with ventilation at room temperature, and then calcined at 300° C. for 2 hours.
実施例４
三菱金属製チタンブラック２０Ｍ（化学組成Ｔｉ２（ｈ
）５０ｇを水５０蔽に投入し充分撹拌を行ったスラリー
中に浸漬しＴｉ２Ｏ３を担持したコルゲート状ハニカム
を得た。この時担持率は１４０％であった。以下実施例
３と同様にした。Example 4 Mitsubishi Metals Titanium Black 20M (chemical composition Ti2 (h
) 50 g of Ti2O3 was added to 50 g of water and immersed in the slurry with thorough stirring to obtain a corrugated honeycomb supporting Ti2O3. At this time, the loading rate was 140%. The following procedure was carried out in the same manner as in Example 3.
実施例５
三井金属鉱業製水酸化ニオブ６７ｇを水５０ｍ父に投入
し充分撹拌を行ったスラリー中に浸漬し、゛水酸化ニオ
ブを担持したコルゲート状ハニカムを得た、この時担持
率は１７５％であった。これを５００℃、３時間焼成し
た。このコルゲート状ハニカムを塩化ルテニウム水溶液
（Ｒｕとして１０ｇ／免）中に浸漬し、通風乾燥後１０
０℃、１８時間乾燥し５００℃、３時間焼成した。Example 5 67 g of niobium hydroxide manufactured by Mitsui Mining & Mining was poured into 50 m of water and immersed in a sufficiently stirred slurry to obtain a corrugated honeycomb carrying niobium hydroxide, at which time the loading rate was 175%. Met. This was baked at 500°C for 3 hours. This corrugated honeycomb was immersed in a ruthenium chloride aqueous solution (10 g/min as Ru), and after ventilation drying,
It was dried at 0°C for 18 hours and fired at 500°C for 3 hours.
実施例６
実施例５の方法において塩化ルテニウム水溶液にかえて
塩化ロジウム水溶ｉ＆（Ｒｂとして１０ｇ／免）を用い
て触媒を得た。Example 6 A catalyst was obtained by using the method of Example 5, but using aqueous rhodium chloride i& (10 g/min as Rb) instead of the aqueous ruthenium chloride solution.
実施例７
実施例５の方法において塩化ルテニウム水溶液にかえて
塩化銀水溶：α（Ａｇとして１０ｇ／見）を用いて触媒
を得た。Example 7 A catalyst was obtained by using the method of Example 5, but using an aqueous silver chloride solution: α (10 g/view as Ag) instead of an aqueous ruthenium chloride solution.
実施例８
実施例５の方法において塩１ヒルテニウム水溶液をＲｕ
として３０ ｇ／Ｑ含有するものを用いて触媒を得た。Example 8 In the method of Example 5, Ru
A catalyst was obtained using a catalyst containing 30 g/Q.
実施例９
実施例５で用いた水酸化ニオブ６７ｇに水酸化カリウム
を６ｇ加え充分撹拌を行ったスラリー中に浸漬し、水酸
化ニオブ−Ｋ ＯＨな担持したコルゲート状ハニカムを
得た。この時の担持率は１６４％であった。これを５０
０℃、３時間焼成した。Example 9 67 g of niobium hydroxide used in Example 5 was immersed in a slurry in which 6 g of potassium hydroxide was sufficiently stirred to obtain a corrugated honeycomb carrying niobium hydroxide-KOH. The loading rate at this time was 164%. 50 of this
It was baked at 0°C for 3 hours.
このコルゲート状ハニカムに塩化ルテニウム水溶液を噴
霧し、通風乾燥後１００℃、１８時間乾燥し５００℃、
３時間焼成した。この時Ｒｕの担持は触媒活性成分中０
．５％であった。This corrugated honeycomb was sprayed with an aqueous ruthenium chloride solution, dried with ventilation, then dried at 100°C for 18 hours, and then dried at 500°C.
It was baked for 3 hours. At this time, the amount of Ru supported in the catalyst active component was 0.
．． It was 5%.
実施例１０
実施例５で得た触媒を還元炉に充填し、貫通孔内にＨ２
を５５０℃の温度条件で２時間通じ、触媒を得た。この
時Ｈ２を用いたＴＰＲ法によればＮｂ ２０４てあった
。Example 10 The catalyst obtained in Example 5 was charged into a reduction furnace, and H2 was poured into the through hole.
The mixture was heated at 550° C. for 2 hours to obtain a catalyst. According to the TPR method using H2 at this time, Nb 204 was found.
実施例１１
実施例５で用いた水酸化ニオブ６７ｇに炭酸カルシウム
１８ｇを加え充分撹拌を行ったスラリー中に浸漬し水酸
化ニオブ−炭酸カルシウムを担持したコルゲート状ハニ
カムを得た。この時担持率は１４９％であった。これを
５００°Ｃ１３時間焼成した。このコルゲート状ハニカ
ムに塩化ルテニウム水溶液を噴霧し、通風乾燥後１００
℃、１８時間乾燥し、５００℃、３時間焼成した。Example 11 18 g of calcium carbonate was added to 67 g of niobium hydroxide used in Example 5 and immersed in a slurry with sufficient stirring to obtain a corrugated honeycomb supporting niobium hydroxide-calcium carbonate. At this time, the loading rate was 149%. This was baked at 500°C for 13 hours. A ruthenium chloride aqueous solution was sprayed onto this corrugated honeycomb, and after ventilation drying,
It was dried at 500°C for 18 hours and fired at 500°C for 3 hours.
参考例１
モーピル石油製ＺＳＭ−５，５０ｇを０．ＩＮ濃度のＣ
ｕＣｌ２溶液に浸漬し、還流器付三ツロフラスコ中で９
０℃〜１００℃で１２時間撹拌し、ろ過した。得られた
ケーキを用いて同様の操作を繰り返し置換量を４．８％
（重量）とした。以下実施例１と同様の操作により触媒
を得た。Reference Example 1 50g of ZSM-5 manufactured by Mopil Oil Co., Ltd. C of IN concentration
Immerse in uCl2 solution and in a Mitsuro flask with a reflux device.
The mixture was stirred at 0°C to 100°C for 12 hours and filtered. Repeat the same operation using the obtained cake until the substitution amount is 4.8%.
(weight). A catalyst was obtained by the same operation as in Example 1.
実施例１〜１１参考例１により得られた触媒を用いて以
下の２つの試験条件にて試験を行った。Examples 1 to 11 Using the catalyst obtained in Reference Example 1, tests were conducted under the following two test conditions.
（１）ガス刊成
■ Ｎｏ ２００ｐｐｍ
０２ ２％
Ｎ２０ １０％
Ｎ２ バランス
■ Ｎｏ ２００ｐｐｍ
Ｈ２０１０％
Ｎ２ バランス
（２）ＳＶ １０００
（３）反応温度 ３００．４００．５００℃試験結
果を第１表に示した。(1) Gas composition ■ No 200ppm 02 2% N20 10% N2 Balance ■ No 200ppm H2010% N2 balance (2) SV 1000 (3) Reaction temperature 300.400.500°C The test results are shown in Table 1.
尚第１表中の値はＮ２への転換率を表している。The values in Table 1 represent the conversion rate to N2.
第１表Table 1
Claims (2)
物を分解する触媒において、 （ａ）ＴｉＯ＿２＿−＿ｘ，Ａｌ＿２Ｏ＿３＿−＿ｙ，
ＮｂＯ＿５＿／＿２＿−＿ｚから選択される１種以上（
ただしｘ，ｙ，ｚ＝０〜１．０） （ｂ）Ｐｔ、Ｒｕ、Ｒｅ、Ｒｈ、Ｐｄ、ＡｇＡｕから選
択される１種以上の金属もしく は金属酸化物分解触媒(1) In a catalyst that decomposes nitrogen oxides by contacting exhaust gas containing nitrogen oxides, (a) TiO_2_-_x, Al_2O_3_-_y,
One or more types selected from NbO_5_/_2_-_z (
However, x, y, z = 0 to 1.0) (b) One or more metals or metal oxide decomposition catalyst selected from Pt, Ru, Re, Rh, Pd, and AgAu
分としてさらにアルカリ金属及びもしくはアルカリ土類
金属酸化物を含有することを特徴とする窒素酸化物分解
触媒(2) A nitrogen oxide decomposition catalyst characterized in that the catalyst according to claim (1) further contains an alkali metal and/or alkaline earth metal oxide as a third component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63298800A JPH02144147A (en) | 1988-11-25 | 1988-11-25 | Catalyst for removal of nitrogen oxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63298800A JPH02144147A (en) | 1988-11-25 | 1988-11-25 | Catalyst for removal of nitrogen oxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02144147A true JPH02144147A (en) | 1990-06-01 |
Family
ID=17864385
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63298800A Pending JPH02144147A (en) | 1988-11-25 | 1988-11-25 | Catalyst for removal of nitrogen oxide |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02144147A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5534237A (en) * | 1991-07-23 | 1996-07-09 | Kubushiki Kaisha Riken | Method of cleaning an exhaust gas and exhaust gas cleaner therefor |
| KR100408880B1 (en) * | 2001-02-03 | 2003-12-11 | 김문찬 | De-NOx CATALYSTS AND METHOD BY DIRECT CATALYTIC REDUCTION |
| JP2010188266A (en) * | 2009-02-17 | 2010-09-02 | Yokohama National Univ | METHOD FOR DECOMPOSING NOx BY LOWER TITANIUM OXIDE |
| CN111151243A (en) * | 2018-11-08 | 2020-05-15 | 中国科学院大连化学物理研究所 | Ruthenium-based catalyst, preparation method and application thereof |
-
1988
- 1988-11-25 JP JP63298800A patent/JPH02144147A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5534237A (en) * | 1991-07-23 | 1996-07-09 | Kubushiki Kaisha Riken | Method of cleaning an exhaust gas and exhaust gas cleaner therefor |
| KR100408880B1 (en) * | 2001-02-03 | 2003-12-11 | 김문찬 | De-NOx CATALYSTS AND METHOD BY DIRECT CATALYTIC REDUCTION |
| JP2010188266A (en) * | 2009-02-17 | 2010-09-02 | Yokohama National Univ | METHOD FOR DECOMPOSING NOx BY LOWER TITANIUM OXIDE |
| CN111151243A (en) * | 2018-11-08 | 2020-05-15 | 中国科学院大连化学物理研究所 | Ruthenium-based catalyst, preparation method and application thereof |
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