MoO3/Al-SBA-15改性催化剂及其在煤焦油加氢裂化中的应用  

MoO3/Al-SBA-15 modified catalyst and its application in coal tar hydrocracking

作　　者：黄澎 刘敏 常秋连 HUANG Peng;LIU Min;CHANG Qiu-lian(Beijing Coal Chemistry Research Institute,China Coal Research Institute,Beijing 100013,China;State Key Laboratory of Coal Mining and Clean Utilization,Beijing 100013,China;Key Laboratory of National Energy Coal Utilization and Energy Conservation and Emissions Reduction Technology,Beijing 100013,China)

机构地区：[1]煤炭科学技术研究院有限公司煤化工分院,北京100013 [2]煤炭资源开采与洁净利用国家重点实验室,北京100013 [3]国家能源煤炭高效利用与节能减排技术装备重点实验室,北京100013

出　　处：《燃料化学学报》2020年第9期1079-1086,I0005,共9页Journal of Fuel Chemistry and Technology

基　　金：国家重点研发计划(2017YFB0602803);北京市自然科学基金(2182090)资助。

摘　　要：利用蒸发诱导法制备了HCl改性的MoO3/Al-SBA-15系列催化剂,采用XRD、BET、TEM、NH3-TPD进行了表征。结果表明,改性后的催化剂保留着SBA-15的六角结构,孔道结构保持有序状态,改性后样品的孔径8nm左右,壁厚4nm左右,属于典型的介孔分子筛,活性组分在载体中分布良好。以预加氢后的中低温煤焦油为原料,采用固定床加氢裂化对催化剂进行了评价,结果表明,经过预硫化之后,负载了MoO3的Al-SBA-15具有良好的加氢裂化活性,MoO3负载量14.9%的情况下,65-145℃石脑油和145-280℃航煤馏分两种较轻组分合计收率为79.21%,其中,石脑油具备很高的芳潜值,最高可达72.4,是优良的重整制取芳烃的原料,裂化后的尾油BMCI值过高,不适宜作为裂化乙烯的原料。A series MoO 3/Al-SBA-15 catalysts modified by HCl were prepared by evaporation induction method.The catalysts were characterized by XRD,BET,TEM and NH 3-TPD.The results showed that the modification of the catalyst retained the hexagonal structure of SBA-15 with ordered pore structure.The pore size of the modified samples was about 8 nm with wall thickness of about 4 nm.The catalysts were typical mesoporous molecular sieves over which the active components were well distributed.The Al-SBA-15 loaded with MoO 3 had good hydrocracking activity after prevulcanization.Under the condition of 14.9%MoO 3 loading,the total yield of naphtha and aviation kerosene fraction was 79.21%.The naphtha had the highest aromatic potential of 72.4,which was an excellent feedstock for reforming to produce aromatics.The high BMCI value of the cracked tail oil was not suitable for ethylene production by cracking.

关 键 词：煤焦油 SBA-15 加氢裂化 芳潜 

分 类 号：TQ536[化学工程—煤化学工程]