摘要
以半纤维素为添加剂对HZSM-5分子筛进行改性,采用XRD、SEM、N2物理吸附-脱附、NH_3-TPD及Py-FTIR手段对其形貌、织构、酸性进行研究。并以丁烯齐聚为探针反应,考察半纤维素改性HZSM-5分子筛对低碳烯烃齐聚的催化能力。结果表明,当半纤维素质量分数为1.6%时,改性分子筛的比表面积、介孔体积最大,酸性最强,催化丁烯齐聚反应表现出了明显的优势,反应140 h转化率仍维持在80%左右,且三聚、四聚产物最多,柴油组分选择性最高。
The HZSM-5 synthesized with modifying by different contents of hemicellulose.The morphology,texture and acidity were characterized with XRD,SEM,N2 adsorption-desorption,NH3-TPD and Py-FTIR.Butene oligomerization over the modified HZSM-5 was tested.The results indicate that the HZSM-5 with the 1.6% hemicellulose exhibits the best activity and stability on the butene oligomerization reaction,the conversion can maintain about 80% after 140 h on stream,with the highest selectivities of the trimer,tetramer and diesel component in the products.These may be related with its high BET surface and mesoporous volume,and the strongest acidity.
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
2017年第9期1088-1094,共7页
Journal of Fuel Chemistry and Technology
基金
中国科学院战略先导专项(XDA07070302)
青岛应用基础研究项目(Grant No.15-9-1-72-jch)
省部共建煤炭高效利用与绿色化工国家重点实验室开放课题(No.2016-11)资助~~
