甲烷在蜂窝状堇青石基催化剂表面的催化燃烧及氢气辅助催化

Methane Catalytic Combustion and Hydrogen Assisted Catalysis on Cordierite-Based Honeycomb Catalyst

为实现超低热值燃料的有效利用、改善贵金属催化剂高温稳定性差及价格昂贵等缺陷,对添加了助剂的催化剂进行了实验研究.搭建了催化燃烧室中试实验平台,采用了4种负载催化剂Pb和不同助剂的蜂窝状堇青石基整体式反应器,分析了超低热值燃料的反应特性,并对氢气对超低热值燃料的辅助催化作用进行了研究.结果表明,添加了不同助剂的催化剂表现出不同的反应特性,但其反应活性稍差于贵金属催化剂;氢气在低温下反应放出热量,提高了催化剂的温度,从而降低了对燃烧室入口温度的要求,氢气的加入确保了超低热值燃料的点火.

The characteristics of catalytic ignition and reaction of ultra low heat value fuel on catalyst with different promoters are investigated experimentally for the development of more efficient technology and the improvement of precious metal catalyst. This paper mainly presents the experimental results of ultra low heat value fuel and H2 assisted catalytic combustion performance of four cordierite-based honeycomb catalysts. The experimental results show that the catalysts with different promoters show different reaction activities, but the reaction activities are poorer than those of precious metal catalyst; that the needed combustor inlet temperature can be lower as catalyst temperature can be increased by heat release due to catalytic hydrogen oxidation at lower temperature, and hydrogen addition ensures the light-off of ultra low heat value fuel.