La-MCM-41催化正庚烷异构化反应.pdf

石油学报(石油加
2015年8月
ACTA PETROLEI SINICA(PETROLEUM PROCESSING SECTION)
第31卷第4期
文章编号:1001-8719(2015)04-0875-08
HPMo-Ni/La-MCM-41催化正庚烷异构化反应
所艳华,王娟2,汪颖军1,陈彦广1,陈刚3
(1.东北石油大学化学化工学院,黑龙江大庆163318;2.大灰石化工程有限公司,器龙江大庆163714;
3.哈尔滨工业大学化学系,黑龙江哈尔滨150001;)
摘要:采用浸渍法制备了以 LA-MCV-41为载体的HPMo-Ni/La-MCM-41系列催化剂。采用XRD、N2吸附-脱附、
FT-IR、SEM、Py-IR、NH3-TPD等手段表征所制备催化剂,并考察了它们在正庚烷异构化反应中的催化性能。结
果表明,与MCM-41相比,La-MCM-41表面具有弱酸性,HPMo在La-MCM-41表面负载更有利于保持其
Bronsted酸酸性和酸强度。在反应温度280℃,还原温度370℃,还原时间4h, MHSV=3.52h1,n(H2)/
n(CnH1s)=12的条件下,20%HPMo-5%Ni/La-MCM-41催化剂催化正庚烷异构化反应的转化率为22.7%,异庚
烷的选择性为63.5%。反应产物中多支链异庚烷比例较高,表明所制备的 HIPMO-NI/La-MCM-41催化剂在长链烷
烃异构反应中具有很好应用潜力。
关键词:MCM-41;La;杂多酸;正庚烷;异构化
中图分类号:O643,32文献标识码:Adoi:10.3969/.issn.1001-8719.2015.04.007
HPMO-NI/LA-MCM-4I Catalyst for n-heptane Hydroisomerization
SUO Yanhua,, WANG Juan, WANG Yingjun, CHEN Yanguang, CHEN Gang
(1. Chemistry and Chemical Engineering School of Northeast Petroleum University, Daging 163318, China
2. Daqing Petrochemical Engineering Co., Ltd, Daging 163714, China
3. Department of Chemistry, Harbin Institute of Technology, Harbin 150001, China
Abstract: A series of HPMO-NI/LA-MCM-41 catalysts were prepared by the impregnation method
and characterized by means of XRD, N2 adsorption-desorption, FT-IR, SEM, PY-IR, NH-TPD
The catalytic performance of the HPMO-NI/LA-MCM-41 samples for the n-heptane isomerization
under different conditions was studied. The results showed that the surface of LA-MCM-41 had
weak acid compared with MCM-41. HPMO was supported on the surface of LA-MCM-41, which was
beneficial to keep the Bronsted acid sites and the acid strength of HPMO. Under the conditions o
n(H)/n(n-c, H6)=12, MHSV=3.32 h reaction temperature of 300C, reduction temperature
of 370, reduction time of 4 h, and with the 20% HPMO-5% Ni/LA-MCM-41 as catalyst, the
conversion of n-heptane hydroisomerization and the selectivity to i-heptane could reach 22.7% and
63.5%, respectively. The proportion of multi-branched isoheptane in reaction products was high
indicating that the HPMO-NI/LA-MCM-41 catalyst had good application potential for long chain
alkane Isomerization
Key words: MCM-41; La; heteropolyacid; n-heptane; isomerization
收稿日期:2014-04-11
甚金项目:国家自然科学基金(51204057)和黑龙江省教育斤科技项目(12521063)资助
第一作者:所艳华,女,讲师,博士研究生,从事稀土改性材料及工业催化的研究;E-mail:suoyanhuatougao@163.com
通讯联系人:汪颖军,男,教授,博士,从事工业催化方面的研究;E-mail; wangying-jun@163,com;陈刚,男,教授,博士,从事能源转
换材料化学的研究;E-mail:chen@hit.edu.cn