生物质炭催化裂解焦油的实验研究

EXPERIMENTAL RESEARCH ON TAR CATALYTIC CRACKING OVER BIOMASS CHAR

通过实验方法研究了生物质炭对生物质热解焦油的催化特性。通过分析焦油裂解率在催化剂及其重量、蒸汽加入量和加入方式、氮气流量等条件下的变化可知:在蒸汽条件下,生物质炭对焦油有显著的催化裂解效果,最高焦油转化率可达96.1%。通过对实验条件下裂解产物、裂解气体积分数的分析可知,生物质炭和蒸汽可以促进热解产物里面的可凝结相转化为不可凝结的气体,并且导致气体组分体积分数的变化。裂解气中氢气产量增加较快,最高可达裂解气体积的50.2%。

The catalytic pyrolysis characteristics of biomass char on tar from biomass pyrolysis were studied by experim- ents. Through analyzing the change of tar conversion rate under conditions like catalyst and its weight, amount and add- ing methods of steam, nitrogen flow etc, conclusion can be drawn that biomass char has remarkable effects in tar catalytic cracking under steam conditions. The maximum tar conversion rate can be of 96.1%. Through the studies of pyrolysis yields and volume fraction of pyrolysis gas under experimental conditions, it can be known that biomass char and steam can promote condensable liquid changing into uneondensable gas and lead to volume fraction changes of pyrolysis gas composition. The yield of hydrogen increases rapidly with the maximum output up to 50.2 % of pyrolysis gas volume.