当前位置: 中文主页 >> 研究成果 >> 论文成果
论文成果

Enhanced performance of HY zeolites by acid wash for glycerol etherification with isobutene

发表时间:2019-03-09
点击次数:
论文类型:
期刊论文
第一作者:
Xiao, Ling
通讯作者:
Zhou, JX (reprint author), Dalian Univ, Coll Environm & Chem Engn, Dalian 116622, Peoples R China.
合写作者:
Mao, Jingbo,Zhou, Jinxia,Guo, Xinwen,Zhang, Shuguang
发表时间:
2011-02-15
发表刊物:
APPLIED CATALYSIS A-GENERAL
收录刊物:
SCIE、EI
文献类型:
J
卷号:
393
期号:
1-2
页面范围:
88-95
ISSN号:
0926-860X
关键字:
Glycerol; Isobutene; Etherification; Zeolite; Acid treatment; Mesopore
摘要:
The etherification of glycerol with isobutene to synthesize di-tert-butyl glycerol ethers (DTBG) and tri-tert-butyl glycerol ether (TTBG) was studied on acid-treated HY zeolites. Compared to the parent commercial HY, both activity and selectivities to the desired ethers were doubled after optimal acid treatments. At 70 degrees C with 1 wt% catalyst loading, the glycerol conversion and the selectivities to DTBG and TTBG after 7 h were 85% and 58%, respectively on a citric acid washed HY. The catalyst showed higher selectivity than an acidic resin (SAC-13) and was reusable. Similar performance was also achieved using nitric acid solutions. Although the acid wash resulted in fewer acid sites due to dealumination, the zeolite crystalinity was retained. Besides increased acid strength, enlarged surface area and pore volume from the generation of mesopores were observed, which were likely to be the key factors for the improved catalytic performance by facilitating mass transfer. (C) 2010 Elsevier B.V. All rights reserved.
是否译文:

辽ICP备05001357号  地址:中国·辽宁省大连市甘井子区凌工路2号 邮编:116024 版权所有:大连理工大学


访问量:    最后更新时间:..