纳米ZSM-5沸石上丁烯的芳构化反应  

Aromatization of butylenes over nano-sized ZSM-5 zeolite

作　　者：叶娜[1] 孙琳[1] 王刃[2] 陈黎行[1] 郭洪臣[1] 王祥生[1] 

机构地区：[1]大连理工大学化工学院催化化学与工程系精细化工国家重点实验室,辽宁大连116023 [2]大连理工大学化工学院化学系,辽宁大连116023

出　　处：《化工学报》2007年第4期913-918,共6页CIESC Journal

基　　金：中国石油天然气股份有限公司资助项目(040508-02-2);辽宁省优秀青年科技人才培养基金项目(3050004)~~

摘　　要：用小型固定床加压反应器研究了液化石油气(C4LPG)中的丁烯在纳米ZSM-5型催化剂DLG-1上的低温芳构化反应,重点考察了原料中二烯烃和碱性氮杂质,以及反应温度、压力和C4LPG进料重量空速(WHSVLPG)条件对催化剂芳构化反应活性及稳定性的影响。结果表明:原料中的二烯烃和碱性氮杂质都能加速催化剂失活,其中碱性氮的失活作用比二烯烃大。反应温度、压力和进料重量空速都对催化剂性能有显著影响,最佳反应条件为450℃、2.0MPa和WHSVLPG=0.83h-1。反应温度、压力和进料空速过高都会导致催化剂积炭失活速度加快。The aromatization of the butylenes in C4 liquefied petroleum gas （LPG） over a nan 5 zeolite catalyst, denoted DLG-1, was studied at a of feed impurities and reaction conditions, such as velocity of LPG （WHSVLPG） on the activity and sta that, both d stability of compoun of infl diene. ue WHS mild temperature. Emphasis was given to reaction temperature, pressure, weight o-sized ZSM- the influence hourly space bility of the aromatization catalyst. The results showed iene and alkaline nitrogen-containing compounds had negative influence on the aromatization the catalyst. Comparatively, the negative influence of the alkaline ds （main On the ly in the manner of strong chemisorption on the acid sites） was much nitrogen-containing stronger than that other hand, reaction temperature, pressure and WHSVLPG also showed significant nce on the performance of the catalyst. The optimum reaction conditions were 450℃, 2.0 MPa and WHSVLPG 0. 83 h 1. A high coking rate of the catalyst was observed when higher temperature, higher pressure and higher WHSVLPG were used.

关 键 词：纳米ZSM-5沸石 丁烯 芳构化 杂质和反应条件 失活 

分 类 号：O643.3[理学—物理化学] TQ241.1[理学—化学]