Development of stable and active PVA-PSSA/SA-PVA catalytic composite membrane for esterification enhancement

被引：13

作者：

Han, Shang ^{[1
]}

Li, Yuewen ^{[1
]}

Bai, Shutong ^{[1
]}

Zhang, Li ^{[1
]}

Li, Weixing ^{[1
]}

Xing, Weihong ^{[1
]}

机构：

[1] Nanjing Tech Univ, Coll Chem & Chem Engn, State Key Lab Mat Oriented Chem Engn, Nanjing 210000, Jiangsu, Peoples R China

来源：

JOURNAL OF APPLIED POLYMER SCIENCE | 2018年 / 135卷 / 30期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

catalysts; crosslinking; membranes; separation techniques; PERVAPORATION-ASSISTED ESTERIFICATION; MIXED MATRIX MEMBRANES; ACETIC-ACID; SODIUM ALGINATE; ZEOLITE MEMBRANE; REACTOR; ETHANOL; DEHYDRATION; PERFORMANCE; SEPARATION;

D O I：

10.1002/app.46514

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

An active and stable catalytic composite membrane (CCM), poly(vinyl alcohol)-poly(styrene sulfonic acid)/sodium alginate-poly(vinyl alcohol) (PVA-PSSA/SA-PVA), was prepared to enhance the esterification of ethanol and propionic acid. The morphologies and crystal structures of the CCMs were investigated by Fourier transform infrared spectroscopy, scanning electron microscopy, and X-ray diffraction. The effects of catalytic layer thickness, mass ratio of PVA to PSSA, concentration of catalytic layer solution, ratio of reaction volume to membrane area, and molar ratio of propionic acid to ethanol were discussed. The pervaporation results showed that the flux of CCM increased from 118 to 320g m(-2) h(-1) compared with the SA-PVA membrane because of the close affinity and low resistance of PSSA to water. After crosslinking with 3-aminopropylmethyldiethoxysilane, the CCMs had good catalytic activities. The acid conversion reached 92.8% at 75 degrees C in 12h, and the stabilization of the CCM was greatly improved. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46514.

引用

页数：9

共 33 条

[1] Pervaporation-Aided Dehydration and Esterification of Acetic Acid with Ethanol Using 4A Zeolite-Filled Cross-linked Sodium Alginate-Mixed Matrix Membranes [J].