不同结构烷烃催化裂解反应的研究  

Study on catalytic cracking reaction of alkanes with different structures

作　　者：陆雯雯[1] 程党国[1] 陈丰秋[1] 詹晓力[1] 

机构地区：[1]浙江大学化学工程与生物工程学系,浙江杭州310027

出　　处：《工业催化》2012年第1期44-48,共5页Industrial Catalysis

基　　金：国家自然科学基金委员会与中国石油化工股份有限公司联合基金(20736011)资助项目

摘　　要：在固定床反应器上,分别以正庚烷、2-甲基戊烷和环己烷为模型化合物,研究了其在中国石化上海石油化工研究院提供的1#和2#催化剂上的裂解反应,分析不同温度下不同结构烷烃原料对催化裂解反应及机理的影响。结果表明,不同结构模型化合物在催化剂上产生不同量的主产物乙烯、丙烯,2#催化剂反应活性高于1#催化剂,裂化机理比率随温度的升高而增大,1#催化剂裂化机理比率大于2#催化剂,相同条件下裂化机理比率最大的是环己烷,最易发生单分子裂解,2-甲基戊烷裂化机理比率最小,表明有相对较多的双分子反应发生。Abstract： Catalytic cracking of n-heptane ,2-methylpentane and cyclohexane were studied on a fixed-bedreactor over catalysts 1# and 2#,which were supplied by Sinopec Shanghai Research Institute of Petro-chemical Technology. The effects of different temperature on the catalytic cracking reaction and mecha- nisms were investigated. The results showed that the activity of the catalyst 2# was superior to that of cata-lyst l#. And the structure of alkane influenced the products distribution obviously. The cracking mecha- nism ratio increased with the enhancement of reaction temperature. The cracking mechanism ratio of cata- lyst 1 # was higher than that of catalyst 2#. Cyclohexane had the highest value of cracking mechanism ratio among the three raw materials, and the single-molecule cracking route for cyclohexane easily occurred; 2-methylpentane had the lowest value of cracking mechanism ratio and the double-molecule cracking reac- tion for relatively more 2-methylpentane occured.

关 键 词：催化剂裂化 裂解反应 中国石化上海石油化工研究院 结构 烷烃 模型化合物 固定床反应器 甲基戊烷 

分 类 号：TE624.41[石油与天然气工程—油气加工工程] O643.1[理学—物理化学]