壳聚糖衍生Cu-N-C催化剂乙炔氢氯化反应性能研究

Cu-N-C catalyst derived from chitosan for acetylene hydrochlorination

本文以壳聚糖为原材料制备了Cu-N-C新型催化剂,考察了Cu-N-C催化剂在乙炔氢氯化反应中的催化性能。Cu-N-C催化剂在180℃和90 h^(-1)的乙炔气体空速(GHSV)下显示出83%的乙炔转化率,Cu-N-C中吡咯氮相对含量的增加可提高催化剂的催化性能,高吡咯氮含量以及铜和氮掺杂的协同作用是催化性能提高的主要原因。Cu-N-C抑制了乙炔氢氯化反应过程中积碳,催化剂可稳定运行80小时。

In this paper,a new type of Cu-N-C catalyst was prepared using chitosan as the raw material,and the catalytic performance of Cu-N-C catalyst in the acetylene hydrochlorination was investigated.At 180℃and when considering a GHSV(C2H2)of 90 h-1,the Cu-N-C catalyst showed an acetylene conversion of 83%.The increase in the relative content of pyrrolic N in Cu-N-C can improve the catalytic performance of the catalyst.The high pyrrolic N content and the synergistic effect of copper and nitrogen doping are the main reasons for the improvement of catalytic performance.Cu-N-C catalyst inhibited the coke deposition during acetylene hydrochlorination.and the catalyst exhibited stable performance during 80 h test.