采用分步浸渍法制备了以Ni为活性组分的整体式催化剂,以萘为生物质焦油的模型化合物,考察了整体式催化剂催化重整生物质粗燃气的性能,通过元素分析、热重分析等方法对催化剂的表面积炭进行了研究。结果表明,在整体式催化剂作用下,108 h的连续反应中,CH4的平均转化率达到92%,最高达到93.8%。合成气H2/CO的摩尔比保持0.95左右,最高达到1.15,适合液体燃料合成。CO2的平均转化率为80%,最高达到88%。实验中添加萘模拟生物质焦油的成分,经检测焦油全部转化为H2、CO及微量轻质组分。反应连续进行108 h,未发现反应器压降变化和CH4与焦油转化率的下降,表明整体式催化剂具有较好的活性和抗积炭性能。
The Ni-based monolithic catalyst was prepared by impregnation.The performance of the monolithic catalyst for the reforming of biomass fuel gas was studied at 750 ℃ for 108 h.The results show that over the monolithic catalyst,the average CH4 conversion reaches 92%.The maximum conversion of CH4 is 93.8%.The average H2/CO mol ratio is 0.95 and the maximum H2/CO mol ratio is 1.15.The conversion of CO2 reaches up to 88%.Naphthalene was added as the tar model compound.It is found that the tar is completely converted to H2,CO and trace lighter hydrocarbon compounds.The catalyst kept its activity during the 108 h reaction.No pressure drop was detected in the reactor,which shows that the catalyst has excellent reforming activity and anti-coking performance.