種別 国内論文 No. 6 年度 2006
論文名 Ni/Al2O3触媒上の高温コークス炉ガスの軽質燃料ガスへの変換
Conversion of hot coke oven gas into light fuel gas over Ni/AL2O3 castalyst
著者名 L Liuyun,K.Morishita,T.Takarada
掲載誌名 Journal of Chemical Engineering of Japan Vol.39, No.4, pp.461-468, 2006
 Ni/Al2O3触媒を用いた高温コークス炉ガス(タール状物質を含む)の軽質燃料ガスへの変換を研究した。

 ラボスケールでのテストを大気圧下、二段固定床反応器で行った。

 ニッケル触媒はタール状物質の水素化熱分解反応を促進した。

 高水素濃度のとき、発生した総てのガスとメタンは高い収率であった。

 炭素原子を含むガスの発生量は923Kで最大となった。

 長期間使用したことにより炭素析出物が触媒を失活するが、触媒は800Kの酸素で処置することで再生した。
Conversion of hot coke oven gas (COG, containing tarry material) into light fuel gas over a Ni/Al2O3 catalyst was studied. Laboratory scale tests were carried out in a two-stage fixed-bed reactor at ambient pressure. The nickel catalyst promoted the hydropyrolysis reaction of tarry materials. High yields of total product gas and methane were obtained at high hydrogen concentrations. If the hydrogen supply was adequate for hydropyrolysis of the tarry material, conversion of coal volatiles was high, at more than 95% on carbon balance, even with a gas residence time as short as 0.15 s in the catalyst bed. At 923 K, the maximum conversion of coal volatiles into the light gas was achieved at 95.0% on carbon balance, with methane 86.7vol% of the carbonaceous gas product. Although carbon deposits deactivated the catalyst after a long period of use, the catalyst could be regenerated by treatment with oxygen at 800K, providing high activity in subsequent decomposition of tarry material.