JPH1076142A - Method for denitrating low temperature waste gas - Google Patents
Method for denitrating low temperature waste gasInfo
- Publication number
- JPH1076142A JPH1076142A JP8233735A JP23373596A JPH1076142A JP H1076142 A JPH1076142 A JP H1076142A JP 8233735 A JP8233735 A JP 8233735A JP 23373596 A JP23373596 A JP 23373596A JP H1076142 A JPH1076142 A JP H1076142A
- Authority
- JP
- Japan
- Prior art keywords
- catalyst
- sulfate
- denitration
- waste gas
- ammonia
- 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.)
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は排ガス中の窒素酸化
物（以下、ＮＯx と略称する）を低温において高い効率
で除去できるＮＯx 含有排ガスの脱硝方法に関する。The present invention is nitrogen oxides in the exhaust gas BACKGROUND OF THE INVENTION (hereinafter, abbreviated as NO x) about the denitration method of the NO x containing exhaust gas can be removed with high efficiency at low temperature.
【０００２】[0002]
【従来の技術】排ガス中のＮＯx を除去する方法とし
て、ＮＯx とアンモニア（ＮＨ3 ）とを接触的に反応さ
せて窒素と水に分解する接触アンモニア還元法が広く用
いられている。この方法には反応を促進するための脱硝
触媒が必要であり、これまで多くの面から触媒開発の研
究がなされてきたが、これまでは主に約２７０℃以上の
温度におけるボイラ等の煙道排ガス用の脱硝触媒の開発
が主であった。As a method of removing NO x of the Related Art in the exhaust gas, NO x and ammonia (NH 3) and the catalytically reacted nitrogen and water decomposing catalytic ammonia reduction method is widely used. This method requires a denitration catalyst for accelerating the reaction, and research on catalyst development has been carried out from many aspects so far, but until now, chiefly a flue such as a boiler at a temperature of about 270 ° C or higher. Development of denitration catalysts for exhaust gas was the main.
【０００３】最近、広温度域、とりわけ２００℃以下の
低温域での脱硝処理のニーズが高まっており、例えば、
２００℃以下で脱硝が必要とされる用途として下記プロ
セスが提案されている。Recently, there has been an increasing need for denitration treatment in a wide temperature range, especially in a low temperature range of 200 ° C. or less.
The following processes have been proposed as applications requiring denitration at 200 ° C. or lower.
【０００４】ごみ焼却炉等の排ガス処理で、電気集塵
器で粉体や夾雑物を除去したあと脱硝を行うプロセスに
使用。（脱硝温度：１３０〜２００℃）、湿式脱硫装
置の前に脱硝装置を設置しＮｏx の等量以上にアンモニ
アを添加する脱硝プロセスに使用。（脱硝温度：７０〜
１５０℃）（なお、このプロセスを採用すると脱硝プロ
セスでの未反応アンモニアは湿式脱硫装置の脱硫吸収液
に溶解し、脱硫性能向上に利用できる。）、トンネル
排ガス中等の低温度ＮＯx （ＮＯx 濃度：１〜５ｐｐ
ｍ）の脱硝プロセスに使用。（脱硝温度：１０〜５０
℃）及び船用等のディーゼルエンジン排ガスからの脱
硝。（脱硝温度：１５０〜２００℃）[0004] Used in exhaust gas treatment of refuse incinerators and the like, in which dust and debris are removed by an electrostatic precipitator before denitration. (Denitration Temperature: 130 to 200 ° C.), using the denitration process of adding ammonia denitration device over an equal volume of the installed No x in front of the wet desulfurization system. (Denitration temperature: 70-
(If this process is adopted, unreacted ammonia in the denitration process is dissolved in the desulfurization absorbing solution of the wet desulfurization device and can be used to improve desulfurization performance.), And low temperature NO x (NO x ) in tunnel exhaust gas etc. Concentration: 1-5pp
m) Used for denitration process. (Denitration temperature: 10 to 50
C) and denitration from exhaust gas of diesel engines for marine use. (Denitration temperature: 150-200 ° C)
【０００５】しかしながら、これまでは上記プロセスに
適用できる低温用の脱硝触媒及び方法は存在しなかっ
た。However, there has been no denitration catalyst and method for low temperature applicable to the above process.
【０００６】[0006]
【発明が解決しようとする課題】すなわち、これまでに
は低温でＮＯx を高い効率で除去できる排ガス浄化方法
は確立されておらず、２００℃以下の排ガスの脱硝は触
媒の性能が低いため、再加熱により排ガス温度を上昇さ
せるなどの工夫がなされていた。本発明は上記技術水準
に鑑み、低温でＮＯx を高い効率で除去できるＮＯx 含
有排ガスの脱硝方法を提供しようとするものである。[SUMMARY OF THE INVENTION That is, this does not exhaust gas purifying method capable of removing with a high efficiency NO x at low temperatures is established by, for the denitration of 200 ° C. or less of the exhaust gas is low performance of the catalyst, Some measures have been taken, such as raising the exhaust gas temperature by reheating. In view of the above prior art, is intended to provide a denitration process of the NO x containing exhaust gas which can remove NO x with a high efficiency at low temperatures.
【０００７】[0007]
【課題を解決するための手段】本発明者らは鋭意低温用
脱硝触媒を探索した結果、特定の物質が有効であるとの
知見を得、その知見に基づいて本発明を完成するに至っ
た。すなわち、本発明は（１）１０〜２００℃の温度域
で、硫酸ニッケル、硫酸鉄、硫酸コバルト、硫酸マンガ
ン及び硫酸亜鉛よりなる群から選ばれた少なくとも１種
の活性物質を担持してなる触媒の存在下で、ＮＯx を含
有する排ガスとアンモニアを接触反応させることを特徴
とする低温排ガスの脱硝方法及び（２）前記担体がチタ
ニア、アルミナ、シリカ、ジルコニア、シリカライト及
びメタロシリケートよりなる群から選ばれた少なくとも
１種の物質であることを特徴とする上記（１）記載の低
温排ガスの脱硝方法である。Means for Solving the Problems As a result of intensively searching for a denitration catalyst for low temperature, the present inventors have found that a specific substance is effective, and have completed the present invention based on the knowledge. . That is, the present invention provides (1) a catalyst which supports at least one active substance selected from the group consisting of nickel sulfate, iron sulfate, cobalt sulfate, manganese sulfate and zinc sulfate in a temperature range of 10 to 200 ° C. (2) a method for denitration of low-temperature exhaust gas, which comprises reacting an exhaust gas containing NO x with ammonia in the presence of NOx; and (2) a group consisting of titania, alumina, silica, zirconia, silicalite and metallosilicate. The method for denitration of low-temperature exhaust gas according to the above (1), wherein the method is at least one substance selected from the group consisting of:
【０００８】[0008]
【発明の実施の形態】本発明の活性物質を担持する担体
としては、一般に多孔質材料ならば何れのものも使用で
きるが、特にチタニア、アルミナ、シリカ、ジルコニ
ア、シリカライト及びメタロシリケートなどが好まし
い。また、一般的に採用される活性物質（各硫酸塩）／
担体の量比は、担体：１００部（重量部）に対し活性物
質：０．３〜５０部（重量部）の範囲が好ましい。この
範囲が好ましい理由は、担体１００重量部に対する活性
物質が０．３重量部未満では活性物質が担体上にまばら
に担持されるため触媒性能が低くなり、また、活性物質
が５０重量部を超えると活性物質の分散性が悪くなり大
きな粒子を形成し、担体の細孔閉塞や比表面積の低下を
もたらすためである。BEST MODE FOR CARRYING OUT THE INVENTION As the carrier for supporting the active substance of the present invention, generally any porous material can be used, but titania, alumina, silica, zirconia, silicalite, metallosilicate and the like are particularly preferable. . In addition, commonly used active substances (sulfates) /
The amount ratio of the carrier is preferably in the range of 0.3 to 50 parts (parts by weight) of the active substance to 100 parts (parts by weight) of the carrier. The reason that this range is preferable is that if the active substance is less than 0.3 parts by weight based on 100 parts by weight of the carrier, the active substance is sparsely supported on the carrier, so that the catalytic performance is lowered, and the active substance exceeds 50 parts by weight. This is because the dispersibility of the active substance deteriorates and large particles are formed, resulting in blockage of pores in the carrier and reduction in specific surface area.
【０００９】（作用）硫酸ニッケル、硫酸鉄、硫酸コバ
ルト、硫酸マンガン、硫酸亜鉛が低温域で高い脱硝性能
を示す理由は未だ明確ではないが、下記の理由が因子の
一つとして考えられる。すなわち、上記触媒は低温域の
反応雰囲気下ではアンモニウムイオンを配位した複塩を
形成する。すなわち上記触媒は各々（ＮＨ4 ）2 Ｎｉ
（ＳＯ4 ）2 ・６Ｈ2 Ｏ、Ｆｅ（ＮＨ4 ）2 （ＳＯ4 ）
2 ・６Ｈ2 Ｏ、Ｃｏ（ＮＨ4 ）2 （ＳＯ4）2 、Ｍｎ
（ＮＨ4 ）2 （ＳＯ4 ）2 ・６Ｈ2 Ｏ、（ＮＨ4 ）2 Ｚ
ｎ（ＳＯ4 ） 2 を有し、全てタットン塩として類似の結
晶構造を形成する。この複塩が脱硝反応の活性種であ
り、低温域で安定に形成できるために低温活性が高いと
考えられる。また、上記触媒はＳＯx が共存する場合の
方がない場合より高性能であり、ＳＯx の共存が上記複
塩の安定な形成に有効に作用していると考えられる。(Action) Nickel sulfate, iron sulfate, koba sulfate
L, manganese sulfate, and zinc sulfate have high denitration performance at low temperatures
Is not clear yet, but the following reasons
Considered as one. That is, the above catalyst is used in a low temperature region.
Under the reaction atmosphere, a double salt coordinated with ammonium ion
Form. That is, each of the above catalysts is (NHFour)TwoNi
(SOFour)Two・ 6HTwoO, Fe (NHFour)Two(SOFour)
Two・ 6HTwoO, Co (NHFour)Two(SOFour)Two, Mn
(NHFour)Two(SOFour)Two・ 6HTwoO, (NHFour)TwoZ
n (SOFour) TwoAll have similar results as Tutton salt
Form a crystalline structure. This double salt is the active species for the denitration reaction.
High activity at low temperatures because it can be formed stably at low temperatures.
Conceivable. Further, the catalyst is SOxWhen coexist
Is better than withoutxCoexistence
It is considered that this is effectively acting on the stable formation of salt.
【００１０】また、上記触媒は硫酸塩を有しているた
め、強い酸性度をもち、ＮＨ3 を低温で活性化吸着させ
ることができる。すなわち、下式に示す脱硝反応を低温
で容易に起こすことが可能である。Further, since the above-mentioned catalyst has a sulfate, it has a strong acidity and can adsorb and activate NH 3 at a low temperature. That is, it is possible to easily cause the denitration reaction represented by the following formula at a low temperature.
【００１１】[0011]
【化１】４ＮＯ＋４ＮＨ3 ＋Ｏ2 →４Ｎ2 ＋６Ｈ2 Ｏ また、上記触媒は前記（２）で示す高比表面積担体上に
担持することにより、より高分散に配位されるため性能
も向上する。Embedded image 4NO + 4NH 3 + O 2 → 4N 2 + 6H 2 O The above catalyst is supported on the high specific surface area support described in the above (2), so that it is coordinated in a higher dispersion and the performance is also improved.
【００１２】さらに、本触媒は副反応である下式で示す
ＳＯ2 酸化反応は抑制されるため、副生成物であり触媒
被毒物質となる硫酸アンモニウムまたは酸性硫酸アンモ
ニウム堆積は軽減される特徴を有する。Further, since the present catalyst suppresses the SO 2 oxidation reaction represented by the following formula, which is a side reaction, the accumulation of ammonium sulfate or ammonium ammonium sulfate, which is a by-product and becomes a catalyst poisoning substance, is reduced.
【化２】２ＳＯ2 ＋Ｏ2 →２ＳＯ3 Embedded image 2SO 2 + O 2 → 2SO 3
【００１３】[0013]
【実施例】以下、本発明の具体的をあげ本発明の効果を
明らかにする。EXAMPLES The effects of the present invention will be clarified below with reference to specific examples of the present invention.
【００１４】（例１）硫酸ニッケル（ＮｉＳＯ4 ・６Ｈ
2 Ｏ）水溶液にγ−アルミナ粉末（住友化学製：ＡＣ−
１１Ｋ）を添加して攪拌しながら１１０℃で蒸発乾固さ
せて、γ−アルミナ担体あたりにＮｉＳＯ4 を１０ｗｔ
％担持した粉末触媒を調製した。この粉末触媒を加圧成
型し１ｍｍφ中にて整粒したペレット触媒を触媒１とし
た。[0014] (Example 1) Nickel sulfate (NiSO 4 · 6H
The 2 O) aqueous solution of γ- alumina powder (Sumitomo Chemical Co.: AC-
11K), evaporate to dryness at 110 ° C. with stirring, and add 10 wt% of NiSO 4 per γ-alumina carrier.
% Supported powder catalyst was prepared. This powder catalyst was molded under pressure, and the pellet catalyst sized at 1 mmφ was designated as catalyst 1.
【００１５】（例２）触媒１のγ−アルミナ粉末の代わ
りにチタニア粉末（石原産業製：ＭＣ−５０）、ジルコ
ニア（日揮化学製）、シリカ（富士ディビソン社製）、
シリカライト及びメタロシリケート〔組成式：Ｈ2 Ｏ
（０．２Ｆｅ2 Ｏ3 ・０．８Ａｌ2 Ｏ3・０．２５Ｃａ
Ｏ）・２５ＳｉＯ2 〕を用いて例１と同様の方法で触媒
を調製し、各担体あたりＮｉＳＯ4 を１０ｗｔ％担持し
て１ｍｍφに整粒したペレット触媒を各々触媒２、３、
４、５、６とした。(Example 2) Instead of γ-alumina powder of catalyst 1, titania powder (MC-50, manufactured by Ishihara Sangyo), zirconia (manufactured by JGC Chemicals), silica (manufactured by Fuji Divison),
Silicalite and metallosilicate [Composition formula: H 2 O
(0.2Fe 2 O 3 · 0.8Al 2 O 3 · 0.25Ca
O) .25SiO 2 ] to prepare a catalyst in the same manner as in Example 1, and pelletized catalysts having 10 wt% of NiSO 4 per support and sized to 1 mmφ were used as catalysts 2, 3, and 2, respectively.
4, 5, and 6.
【００１６】（例３）触媒１の硫酸ニッケル（ＮｉＳＯ
4 ・６Ｈ2 Ｏ）水溶液の代わりに硫酸鉄（ＦｅＳＯ4 ・
７Ｈ2 Ｏ）、硫酸コバルト（ＣｏＳＯ4 ・７Ｈ2 Ｏ）、
硫酸マンガン（ＭｎＳＯ4 ・７Ｈ2 Ｏ）、硫酸亜鉛（Ｚ
ｎＳＯ4 ・７Ｈ2 Ｏ）の各水溶液を用いて例１と同様の
方法でγ−アルミナ担体に、各金属硫酸塩を１０ｗｔ％
担持した。１ｍｍφに整粒たペレット触媒を各々触媒
７、８、９、１０とした。(Example 3) Nickel sulfate (NiSO
4 · 6H 2 O) aqueous solution of iron sulfate in place of (FeSO 4 ·
7H 2 O), cobalt sulfate (CoSO 4 .7H 2 O),
Manganese sulfate (MnSO 4 · 7H 2 O) , zinc sulfate (Z
nSO 4 .7H 2 O) and 10 wt% of each metal sulfate on a γ-alumina support in the same manner as in Example 1.
Carried. The pellet catalysts sized to 1 mmφ were designated as catalysts 7, 8, 9, and 10, respectively.
【００１７】例１〜３にて調製した触媒１〜１０を用い
て脱硝評価活性試験を行った。活性評価条件は表１のと
おり。Using the catalysts 1 to 10 prepared in Examples 1 to 3, a denitration evaluation activity test was performed. The activity evaluation conditions are as shown in Table 1.
【００１８】[0018]
【表１】 [Table 1]
【００１９】ガス供給１０時間後、５０時間後の脱硝率
を表２に示す。なお、脱硝率の定義は下記式にて表わさ
れる。Table 2 shows the denitration rates after 10 hours and 50 hours of gas supply. The denitration rate is defined by the following equation.
【００２０】[0020]
【数１】 (Equation 1)
【００２１】[0021]
【表２】 [Table 2]
【００２２】（比較例１）従来の脱硝触媒として検討さ
れている酸化物系触媒として、チタニア担体にＣｒ2 Ｏ
3 を担持した触媒を触媒１１（比較触媒１）とし、ま
た、２００℃以上の中高温用脱硝触媒として適用されて
いるチタニア担体にＶ2 Ｏ5 を担持した触媒を触媒１２
（比較触媒２）も例１と同様に１ｍｍφに整粒し、表１
に示す活性評価条件にて脱硝試験を行った。結果を表２
に併記した。(Comparative Example 1) As an oxide-based catalyst which has been studied as a conventional denitration catalyst, Cr 2 O was added to a titania carrier.
The catalyst carrying 3 was designated as catalyst 11 (comparative catalyst 1), and the catalyst carrying V 2 O 5 on a titania carrier used as a denitration catalyst for medium to high temperatures of 200 ° C. or higher was designated as catalyst 12.
(Comparative catalyst 2) was also sized to 1 mmφ in the same manner as in Example 1;
A denitration test was performed under the activity evaluation conditions shown in Table 1. Table 2 shows the results
It was also described in.
【００２３】表２に示す結果より触媒１〜１０に示す硫
酸塩含有触媒を用いることにより、９０℃の低温で高い
脱硝率を安定に有することを確認した。一方、比較触媒
１は１０時間後までの活性は高いが５０時間後には大き
く活性が低下し、さらに、比較触媒２は初期活性におい
ても触媒１〜１０より大きく下廻ることがわかった。From the results shown in Table 2, it was confirmed that the use of the sulfate-containing catalysts shown in Catalysts 1 to 10 stably provided a high denitration ratio at a low temperature of 90 ° C. On the other hand, it was found that the activity of Comparative Catalyst 1 was high up to 10 hours later, but the activity was significantly reduced after 50 hours, and that Comparative Catalyst 2 was much lower in initial activity than Catalysts 1 to 10.
【００２４】（例５）触媒１を用いて表１に示す活性評
価条件を基準に各反応条件変化試験を実施した。表１の
条件をベースに各パラメータとして、反応温度、ＮＨ3
濃度、ＳＯ2濃度、Ｏ2 濃度の影響として温度：７０
℃、１３０℃、ガス組成としてＮＨ3 ：１０００ｐｐ
ｍ、ＳＯ2 ：４００ｐｐｍ、１２００ｐｐｍ、Ｏ2 ：２
％で活性評を行い他の条件に固定した場合の活性価結果
（ガス供給１０時間後）を表３に示す。(Example 5) Using the catalyst 1, a test for changing each reaction condition was carried out based on the activity evaluation conditions shown in Table 1. Based on the conditions in Table 1, the reaction temperature, NH 3
Temperature: 70 as the effect of concentration, SO 2 concentration and O 2 concentration
° C, 130 ° C, NH 3 : 1000 pp as gas composition
m, SO 2 : 400 ppm, 1200 ppm, O 2 : 2
Table 3 shows the activity value results (after 10 hours of gas supply) when the activity was evaluated in% and fixed under other conditions.
【００２５】[0025]
【表３】 上記結果より、広範囲な低温排ガス条件において高い脱
硝率を有することを確認した。[Table 3] From the above results, it was confirmed that the denitration ratio was high under a wide range of low-temperature exhaust gas conditions.
【００２６】[0026]
【発明の効果】実施例にて示したように硫酸塩を活性金
属として各種担体上に担持した触媒を使用する本発明方
法は９０℃付近の低温域で高い脱硝率を有し、さらに広
範囲の排ガス条件で安定な活性を有することがわかっ
た。As shown in the examples, the method of the present invention using a catalyst in which a sulfate is supported as an active metal on various supports has a high denitration rate in a low temperature range around 90 ° C. It was found to have stable activity under exhaust gas conditions.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｂ０１Ｊ 32/00 Ｂ０１Ｄ 53/36 ＺＡＢ １０２Ｈ (72)発明者 三輪 勝 愛知県名古屋市緑区大高町字北関山20番地 の１ 中部電力株式会社技術開発本部電気 利用技術研究所内 (72)発明者 野島 繁 広島県広島市西区観音新町四丁目６番22号 三菱重工業株式会社広島研究所内 (72)発明者 鈴村 洋 広島県広島市西区観音新町四丁目６番22号 三菱重工業株式会社広島研究所内 (72)発明者 田中 裕士 広島県広島市西区観音新町四丁目６番22号 三菱重工業株式会社広島研究所内──────────────────────────────────────────────────の Continuation of the front page (51) Int.Cl. 6 Identification code Agency reference number FI Technical display location B01J 32/00 B01D 53/36 ZAB 102H (72) Inventor Masaru Miwa Odaka, Midori-ku, Nagoya-shi, Aichi Prefecture 20-1, Kita-Sanzan, town character Chubu Electric Power Co., Inc., Electricity Utilization Research Laboratory (72) Inventor Shigeru Nojima 4--22 Kanonshinmachi, Nishi-ku, Hiroshima-shi, Hiroshima Hiroshima Research Laboratory Mitsubishi Heavy Industries, Ltd. (72) Inventor Hiroshi Suzumura 4-6-22 Kannon Shinmachi, Nishi-ku, Hiroshima City, Hiroshima Prefecture Inside the Hiroshima Research Laboratory, Mitsubishi Heavy Industries, Ltd. Inside
Claims (2)
ル、硫酸鉄、硫酸コバルト、硫酸マンガン及び硫酸亜鉛
よりなる群から選ばれた少なくとも１種の活性物質を担
持してなる触媒の存在下で、窒素酸化物を含有する排ガ
スとアンモニアを接触反応させることを特徴とする低温
排ガスの脱硝方法。1. The method according to claim 1, wherein a catalyst carrying at least one active substance selected from the group consisting of nickel sulfate, iron sulfate, cobalt sulfate, manganese sulfate and zinc sulfate in a temperature range of 10 to 200 ° C. A method for denitrifying low-temperature exhaust gas, comprising contacting an exhaust gas containing nitrogen oxides with ammonia.
カ、ジルコニア、シリカライト及びメタロシリケートよ
りなる群から選ばれた少なくとも１種の物質であること
を特徴とする請求項１記載の低温排ガスの脱硝方法。2. The method according to claim 1, wherein the carrier is at least one substance selected from the group consisting of titania, alumina, silica, zirconia, silicalite and metallosilicate. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8233735A JPH1076142A (en) | 1996-09-04 | 1996-09-04 | Method for denitrating low temperature waste gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8233735A JPH1076142A (en) | 1996-09-04 | 1996-09-04 | Method for denitrating low temperature waste gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1076142A true JPH1076142A (en) | 1998-03-24 |
Family
ID=16959761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8233735A Withdrawn JPH1076142A (en) | 1996-09-04 | 1996-09-04 | Method for denitrating low temperature waste gas |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1076142A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008104914A (en) * | 2006-10-24 | 2008-05-08 | Tosoh Corp | Nitrogen oxide purification catalyst and method |
| JP2014176808A (en) * | 2013-03-14 | 2014-09-25 | Mitsubishi Heavy Ind Ltd | Nitrous oxide treatment catalyst and purification method of exhaust gas using the nitrous oxide treatment catalyst |
| CN105642308A (en) * | 2016-01-01 | 2016-06-08 | 重庆大学 | Supported cobalt manganese oxide catalyst for low-temperature flue gas denitration and preparation method thereof |
| CN108579408A (en) * | 2018-04-04 | 2018-09-28 | 江苏华本环境科技有限公司 | A kind of low-temperature catalyzed denitration method for flue gas |
| CN112844423A (en) * | 2021-01-12 | 2021-05-28 | 上海大学 | High-sulfur-resistance metal sulfate denitration catalyst and preparation method thereof |
| CN116272334A (en) * | 2022-12-26 | 2023-06-23 | 杭州尚善若水环保科技有限公司 | Coupling desulfurization and denitrification medicament, preparation method and use method thereof |
-
1996
- 1996-09-04 JP JP8233735A patent/JPH1076142A/en not_active Withdrawn
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008104914A (en) * | 2006-10-24 | 2008-05-08 | Tosoh Corp | Nitrogen oxide purification catalyst and method |
| JP2014176808A (en) * | 2013-03-14 | 2014-09-25 | Mitsubishi Heavy Ind Ltd | Nitrous oxide treatment catalyst and purification method of exhaust gas using the nitrous oxide treatment catalyst |
| CN105642308A (en) * | 2016-01-01 | 2016-06-08 | 重庆大学 | Supported cobalt manganese oxide catalyst for low-temperature flue gas denitration and preparation method thereof |
| CN108579408A (en) * | 2018-04-04 | 2018-09-28 | 江苏华本环境科技有限公司 | A kind of low-temperature catalyzed denitration method for flue gas |
| CN112844423A (en) * | 2021-01-12 | 2021-05-28 | 上海大学 | High-sulfur-resistance metal sulfate denitration catalyst and preparation method thereof |
| CN116272334A (en) * | 2022-12-26 | 2023-06-23 | 杭州尚善若水环保科技有限公司 | Coupling desulfurization and denitrification medicament, preparation method and use method thereof |
| CN116272334B (en) * | 2022-12-26 | 2023-08-15 | 杭州尚善若水环保科技有限公司 | Coupling desulfurization and denitrification medicament, preparation method and use method thereof |
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Legal Events
| Date | Code | Title | Description |
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| A300 | Withdrawal of application because of no request for examination |
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