工艺条件对HZSM-5催化剂噻吩烷基化反应性能的影响  

Effect of reaction conditions on desulfurization performance of HZSM-5 zeolites

作　　者：代英杰 陈文文 毛艳红[1] 刘冬梅[1] 魏民[1] 

机构地区：[1]辽宁石油化工大学化学化工与环境学部,辽宁抚顺113001

出　　处：《石化技术与应用》2018年第1期5-9,13,共6页Petrochemical Technology & Application

基　　金：辽宁省自然基金(项目编号:2014-525-000-0079)

摘　　要：采用碱和柠檬酸依次处理HZSM-5分子筛,制备出具有微孔-介孔多级孔HZSM-5催化剂,记为HZ(AC-0.5),通过X射线衍射(XRD)、比表面积(BET)、氨气程序升温脱附(NH3-TPD)等方法对改性前后的催化剂进行表征,并在小型固定床反应器上,考察了工艺条件对催化剂噻吩烷基化反应的影响。结果表明:在反应温度为120℃,反应压力为1.0 MPa,体积空速为1.0 h-1的条件下,HZ(AC-0.5)催化剂的噻吩烷基化转化率最高可达95.6%;催化剂反应重复进行5次后,噻吩的转化率明显下降,说明催化剂已经失活;对失活的催化剂进行高温处理再生后,其噻吩转化率为91.3%,说明高温处理后的再生催化剂依然具有较强活性。The microporous- mesoporous hierar- chical pore HZSM -5 molecular sieve, after treating by alkall and citric acid successively,was prepared, denoted by HZ （ AC - 0.5 ） , and the raw and modi- fied catalyst was characterizd by X - ray diffraction （XRD） , specific surface area（BET） , NH3 tempera- ture programmed desorption （ NH3 - TPD） and the effect of process conditions on catalyst thiophene al- kylation reaction was investigated in a small fixed bed reactor. The results showed that under the con- ditions of reaction temperature 120 ℃ ,reaction pres-sure 1.0 MPa, volume velocity 1. 0 h-I, the thio- phene alky｜ation conversion of HZ （ AC - 0.5 ） cata- lyst reached the highest 95. 6%; after repeating 5 times, the thiophene conversion decreased obvious- ly, indicating that the catalyst was deactivated ;it was processed and regenerated by high temperature,thio- furan conversion of HZSM - 5 catalyst was 91.3% , showing that the regenerated catalyst treated by high -temperature still had strong activity.

关 键 词：HZSM-5分子筛 脱硫 噻吩烷基化 工艺 

分 类 号：TQ426.95[化学工程]