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Catalytic Decomposition of Pyridine with Goethite-Rich Limonite in the Coexistence of Fuel Gas or Coke Oven Gas Components

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Title: Catalytic Decomposition of Pyridine with Goethite-Rich Limonite in the Coexistence of Fuel Gas or Coke Oven Gas Components
Authors: Ogawa, Ayumu Browse this author
Mochizuki, Yuuki Browse this author →KAKEN DB
Tsubouchi, Naoto Browse this author →KAKEN DB
Keywords: hot gas cleanup
pyridine decomposition
N2 formation
fuel gas
coke oven gas
Issue Date: 15-Jul-2016
Publisher: Iron and Steel Institute of Japan
Journal Title: ISIJ International
Volume: 56
Issue: 7
Start Page: 1132
End Page: 1137
Publisher DOI: 10.2355/isijinternational.ISIJINT-2016-052
Abstract: Catalytic performance of limonite in the decomposition of 100 ppmv pyridine (C5H5N) in the coexistence of fuel gas or coke oven gas (COG) components has been studied mainly with a cylindrical quartz reactor at 750–850°C under a high space velocity of 51000 h−1 to develop a novel hot gas cleanup method of removing the nitrogen in tar as N2. The limonite catalyst achieves the almost complete decomposition of C5H5N in He at 500–850°C and gives a high N2 yield of more than 85 N% at 500°C. When the decomposition run is performed in the presence of fuel gas or COG components, the coexistence of 20% CO/10% H2 at 750°C or 50% H2/30% CH4/5% CO at 850°C deactivates the limonite with remarkable formation of deposited carbon. On the other hand, the addition of a small amount of H2O or CO2 to these atmospheres can improve the catalytic activity without carbon deposition. When 3% H2O or 10% CO2 is added to 20% CO/10% H2, C5H5N conversion and N2 yield at 750°C become 80–95% and 65–80 N%, respectively, and the extent of the improvement is larger with the CO2 than with the H2O. The addition of 5% CO2 to 50% H2/30% CH4/5% CO also restores the conversion or the yield at 850°C to the high level of about 90% or 60–70 N%, respectively, and both values at 950°C are comparable to those at 500°C in inert gas
Rights: 著作権は日本鉄鋼協会にある
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 坪内 直人

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