Sustainable production of acrolein:: Gas-phase dehydration of glycerol over Nb2O5 catalyst

被引：243

作者：

Chai, Song-Hai ^{[1
]}

Wang, Hao-Peng ^{[1
]}

Liang, Yu ^{[1
]}

Xu, Bo-Qing ^{[1
]}

机构：

[1] Tsing Hua Univ, Dept Chem, Key Lab Organ Optoelect & Mol Engn, Innovat Catalysis Program, Beijing 100084, Peoples R China

来源：

JOURNAL OF CATALYSIS | 2007年 / 250卷 / 02期

关键词：

niobium oxide (Nb2O5); solid acid; glycerol (glycerin); acrolein; alcohol dehydration; sustainable technology;

D O I：

10.1016/j.jcat.2007.06.016

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Gas-phase dehydration of glycerol to produce acrolein was investigated at 315 degrees C over Nb2O5 catalysts calcined in the temperature range of 350-700 degrees C. The catalysts were characterized by nitrogen physisorption, TG-DTA, XRD, and n-butylamine titration using Hammett indicators to gain insight into the effect of calcination temperature on catalyst texture, crystal structure, and acidity. Calcination at 350 and 400 degrees C produced amorphous Nb2O5 catalysts that exhibit significantly higher fractions of strong acid sites at -8.2 <= Ho <= -3.0 (Ho being the Hammett acidity function) than the crystallized Nb2O5 samples obtained by calcination at or above 500 degrees C. Glycerol conversion and acrolein selectivity of the Nb2O5 catalysts were dependent of the fraction of strong acid sites (-8.2 <= Ho <= -3.0). The amorphous catalyst prepared by the calcination at 400 degrees C, having the highest fraction of acid sites at -8.2 <= Ho <= -3.0, showed the highest mass specific activity and acrolein selectivity (51 mol%). The other samples, having a higher fraction of either stronger (Ho <= -8.2) or weaker acid sites (-3.0 <= Ho <= 6.8), were less effective for glycerol dehydration and formation of the desired acrolein. (c) 2007 Elsevier Inc. All rights reserved.

引用

页码：342 / 349

页数：8

共 26 条

[11]

Guisnet M., 1997, HDB HETEROGENEOUS CA, V2, P626

[12]

Haas T., 1995, US Pat, Patent No. 5426249

[13] An overview of aqueous-phase catalytic processes for production of hydrogen and alkanes in a biorefinery [J].

Huber, GW ;

Dumesic, JA .

CATALYSIS TODAY, 2006, 111 (1-2) :119-132

[14] ACIDIC AND CATALYTIC PROPERTIES OF NIOBIUM PENTAOXIDE [J].

IIZUKA, T ;

OGASAWARA, K ;

TANABE, K .

BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 1983, 56 (10) :2927-2931

[15]

Klass D.L., 1998, Biomass for Renewable Energy, Fuels, and Chemicals, P1, DOI [10.1016/B978-012410950-6/50003-9, DOI 10.1016/B978-012410950-6/50003-9]

[16] Glycerol conversion in the aqueous solution under hydrogen over Ru/C plus an ion-exchange resin and its reaction mechanism [J].

Miyazawa, Tomohisa ;

Kusunoki, Yohei ;

Kunimori, Kimio ;

Tomishige, Keiichi .

JOURNAL OF CATALYSIS, 2006, 240 (02) :213-221

[17]

Neher A., 1995, US Patent, Patent No. [5,387,720, 5387720, 5 (1995) 387 720]

[18] Catalytic dehydration of glycerol in sub- and supercritical water: a new chemical process for acrolein production [J].

Ott, L ;

Bicker, M ;

Vogel, H .

GREEN CHEMISTRY, 2006, 8 (02) :214-220

[19] ACID-CATALYZED DEHYDRATION OF ALCOHOLS IN SUPERCRITICAL WATER [J].

RAMAYYA, S ;

BRITTAIN, A ;

DEALMEIDA, C ;

MOK, W ;

ANTAL, MJ .

FUEL, 1987, 66 (10) :1364-1371

[20]

SCHWENK E, 1933, Patent No. 1916743

← 1 2 3 →