JP5680389B2 - 繊維状炭素の製造方法 - Google Patents
繊維状炭素の製造方法 Download PDFInfo
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- 229910052799 carbon Inorganic materials 0.000 title claims description 74
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims description 71
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- 238000006243 chemical reaction Methods 0.000 claims description 212
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 8
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- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 description 1
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- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 0.000 description 1
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- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
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- Inorganic Fibers (AREA)
- Carbon And Carbon Compounds (AREA)
Description
<反応装置>
図1は、実施形態に係る反応装置10を示す。
次に、この反応装置10を用いた繊維状炭素の製造方法について説明する。
<反応装置>
図3は、実施形態2に係る反応装置10を示す。なお、実施形態1と同一名称の部位は実施形態1と同一符号で示す。
次に、この反応装置10を用いた繊維状炭素の製造方法について説明する。
反応終了後、触媒に堆積した繊維状炭素は走査型電子顕微鏡(日立製作所製FESEM)を用いて繊維状炭素の外観を観察すると共に、得られた写真画像から任意に15箇所の繊維状炭素を選出して繊維径及び繊維長を計測し、その平均値とした。
捕集された気体についてTCD型のガスクロマトグラフ分析装置(VARIAN社マイクロGC、CP4900)にて水素、一酸化炭素、二酸化炭素等のそれぞれのガス成分濃度を定量した。
捕集された気体についてガスクロマトグラフ分析にて一酸化炭素、二酸化炭素、メタン、エタン、エチレン、プロパン、プロピレン等、炭素原子を含むそれぞれのガス成分濃度を定量し、気体捕集量との積からそれぞれのモル数を算出した。また捕集された液体についてガスクロマトグラフ分析にて未反応原料及び反応生成物のそれぞれの定量を行ってモル数を算出した。そして、各成分の分子構造から換算される炭素原子のモル重量を合計し、反応原料の投入量から算出される炭素原子のモル重量から減じた数値を炭素析出量とした。なお、この炭素析出量は、その値が大きいほど触媒表面上に炭素析出が効果的に進行していることを意味する。
図3に示すのと同一構成であって、流体供給ポンプがマイクロフィーダーであり、予熱部が内径1.0mm及び長さ1000mmの円管流路を有するSUS316材製のものであり、反応部が内径7.5mm及び長さ200mmの内壁が平滑面の円管流路を有するニッケル材製のもの(ニッケル純度>99.0%、中心線平均粗さRa0.4μm)であり、冷却部が内径1.8mm及び長さ1000mmの円管流路を有するSUS316材製で空冷方式のものであり、加熱部として輻射伝熱形式で600℃に昇温及び恒温する電気炉を配置した反応装置を構成した。この反応装置では、反応部の内壁が金属触媒を構成する(触媒総表面積0.004731m2)。
図3に示すのと同一構成であって、流体供給ポンプがマイクロフィーダーであり、予熱部が内径1.0mm及び長さ1000mmの円管流路を有するSUS316材製のものであり、反応部が内径7.5mm及び長さ200mmの内壁が平滑面の円管流路を有するニッケル材製のもの(ニッケル純度>99.0%、中心線平均粗さRa0.4μm)であり、冷却部が内径1.8mm及び長さ1000mmの円管流路を有するSUS316材製で空冷方式のものであり、加熱部として輻射伝熱形式で600℃に昇温及び恒温する電気炉を配置した反応装置を構成した。この反応装置では、反応部の内壁が金属触媒を構成する(触媒総表面積0.004731m2)。
図3に示すのと同一構成であって、流体供給ポンプがマイクロフィーダーであり、予熱部が内径1.0mm及び長さ1000mmの円管流路を有するSUS316材製のものであり、反応部が内径1.8mm及び長さ200mmの円管流路を有するSUS316材製のものにNi粉末(純度99.0%以上、粒径150μm以下、触媒総表面積0.000532m2)118mgを充填したものであり、冷却部が内径1.8mm及び長さ1000mmの円管流路を有するSUS316材製で空冷方式のものであり、加熱部として輻射伝熱形式で600℃に昇温及び恒温する電気炉を配置した反応装置を構成した。
図3に示すのと同一構成であって、流体供給ポンプがマイクロフィーダーであり、予熱部が内径1.0mm及び長さ1000mmの円管流路を有するSUS316材製のものであり、反応部が内径1.8mm及び長さ100mmの内壁が平滑面の円管流路を有するニッケル材製のもの(ニッケル純度>99.0%、中心線平均粗さRa0.4μm)であり、冷却部が内径1.8mm及び長さ1000mmの円管流路を有するSUS316材製で空冷方式のものであり、加熱部として輻射伝熱形式で600℃に昇温及び恒温する電気炉を配置した反応装置を構成した。この反応装置では、反応部の内壁が金属触媒を構成する(触媒総表面積0.000559m2)。
表1は、実施例1、2及び比較例1、2それぞれで用いた反応装置の反応部の反応流路等の構成及び試験評価結果を示す。
11 原料流体供給部
12 流体供給ポンプ
13 反応部
13a 反応流路
14 反応場
15 回収部
16 加熱部
17 触媒
18 予熱部
19 冷却部
Claims (6)
- 多価アルコールと水とを含む混合ガスを、反応部に設けられたJIS B 0601で規定している中心線平均粗さRaが5.0μm以下である平滑面を有する触媒に400〜1000℃の加熱雰囲気下で接触させることにより、平均繊維径10〜200nmの繊維状炭素を製造することを特徴とする繊維状炭素の製造方法。
- 多価アルコールと水とを含む混合ガスを、流速0.001〜0.05m/sで連続的に
反応部に供給した後、該反応部に内在する触媒の総表面積に対する多価アルコールの総供給量が0.1〜20kg/m2のときに運転を停止し、該触媒の表面に生長した繊維状炭
素を回収することを特徴とする請求項1記載の繊維状炭素の製造方法。 - 多価アルコールと水とを含む混合ガスの反応部への供給時の温度が500℃以上であることを特徴とする請求項1又は2記載の繊維状炭素の製造方法。
- 反応部に供給する多価アルコールと水とのモル比率を、多価アルコールの炭素原子数に対して水を1〜5モル倍とすることを特徴とする請求項1〜3のいずれかに記載の繊維状炭素の製造方法。
- 触媒がNi又はNiを含む混合物であることを特徴とする請求項1〜4のいずれかに記載の繊維状炭素の製造方法。
- 多価アルコールがグリセリンである請求項1〜5のいずれかに記載の繊維状炭素の製造方法。
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