减压蜡油缓和加氢裂化催化剂酸性研究  

INVESTIGATION ON THE ACIDITY OF ZEOLITE BASED MILD HYDROCRACKING CATALYSTS

作　　者：杜崇敬[1] 黄志渊[1] 

机构地区：[1]北京石油化工科学研究院

出　　处：《燃料化学学报》1994年第3期308-314,共7页Journal of Fuel Chemistry and Technology

摘　　要：用热重原位氨吸附－程序升温脱附及氨吸附－差热法考察了含分子筛缓和加氢裂化催化剂的载体、活性金属组分及催化剂本身的酸性。发现载体的总酸量是其分子筛含量的线性函数。载体担载上Ｎｉ、Ｗ活性组分后，可不同程度的引起催化剂的酸性变化。催化剂中分子筛含量增加除提高其加氢裂化活性外，还可增加它的ＶＧＯ加氢脱氮及加氢脱芳烃的活性，但会引起中馏份选择性的下降。催化剂的酸性可通过载体的分子筛含量、类型及分子筛改性加以调节。The acidity of zeolite based MHC catalyst and their carriers as well as the pureactive components are determined by TG-in situ NH_3 adsorption-TPD method and NH_3 ad-sorption-DTA method developed in this institute. It has been found that the aciditv of zeo-lite based MHC catalysts may be regulated by changing the zeolite content in carriers and thetype of zeolite used and by the modification of the zeolites. The total number of acid centerson the carrier is a linear function of the zeolite content in carrier.Deposition of Ni、W and Ni-W on the carriers may change the acidity of the later. The hydrocracking and hydrodearo-matization activity of the catalyst for the mild hydrocracking of VGO will be enhanced byhigher zeolite content,while the middle distillate selectivity will be decreased to some ex-tent.

关 键 词：酸性 催化剂 分子筛 加氢裂化 蜡油 

分 类 号：TQ426.95[化学工程]