摘要
针对生物质气化气中硫化物少、V(H2/CO)低和V(CO2)高的特点,采用气化炉内铁系高温变换催化剂和 气化炉外钛促进的钴钼耐硫催化剂进行水煤气变换调整H2/CO比,添加部分沼气重整过量CO2,对生物质合成气 化学当量比调整进行了实验研究。结果表明:气化炉内铁系催化剂调整效果不明显;在高温低硫的生物质气化 气中,钛促进的钴钼耐硫催化剂具有较高的变换活性,CO转化率达到80％以上,合成气H2/CO比在1-8范围内 可调;在V(CH4/CO2)=1、常压、750℃和镍基催化剂作用下沼气重整过量CO2,制备出宽V(H2/CO)、V(CO2)和 V(CH4)均低于5％(摩尔百分比)的合成气;通过水煤气变换过程结合沼气重整过程,可依据目的产物合成的要 求,制备合适化学当量比、高碳转化率的生物质合成气。
Biomass air gasification produces syngas with low sulfide, low H2/CO ratio and high CO2 content. The water gas shift （WGS） reaction was adopted to adjust H2/CO ratio by adding iron based catalyst into the gasifier and adding TiO2 modified Co-Mo based catalyst into the fixed bed outside the gasifier. The co-reforming of biogas and biomass syngas was adopted to convert excess CO2 to H2 and CO. The results showed that the iron based catalyst in the gasifier had little effect on H2/CO ratio; TiO2 modified Co-Mo based catalyst had high reaction activity, and CO conversion was above 80% ; A broad range of the H2/CO ratio （1-8） could be adjusted by flowing part of the syngas into the Co-Mo catalyst bed. At the condition of lbar, 750℃ and CH4/CO2 （1：1）, high conversion of CH4 and CO2 was obtained and the content of both in the effluent gas was within 5mol% ; Through WGS and co-reforming reaction, the preferable stoichiometric ratio could be adjusted for synthesis requirement of desired products.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2005年第4期533-537,共5页
Acta Energiae Solaris Sinica
基金
国家863创新性项目(2001AA514020)
