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摘要: 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，108h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108h，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。Abstract: The Nibased monolithic catalyst was prepared by impregnation. The performance of the monolithic catalyst for the reforming of biomass fuel gas was studied at 750℃ for 108h. 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 108h reaction. No pressure drop was detected in the reactor, which shows that the catalyst has excellent reforming activity and anticoking performance.
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Key words:
- biomass fuel gas /
- monolithic catalyst /
- tar conversion
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