Oxidative coupling of methane catalyzed by Li, Na and Mg doped BaSrTiO3

被引:38
作者
Fakhroueian, Z. [1 ]
Farzaneh, F. [1 ]
Afrookhteh, N. [1 ]
机构
[1] Univ Alzahra, Dept Chem, Tehran, Iran
关键词
BaSrTiO3; oxidative coupling of methane; doping; perovskite;
D O I
10.1016/j.fuel.2008.02.010
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
The XBaSrTiO3 (X = Li, Na, Mg) with perovskite structure was prepared by impregnation of LiCl, NaCl or MgCl2 solution on BaSrTiO3 (BST) surface. The products were characterized with XRD, SEM, UV, FT-IR and Raman spectroscopy. Determination of band gap, conduction and basicity of the prepared catalysts revealed that NaBST exhibits the lowest band gap and the most conduction and basicity. The catalytic performances of XBSTs for the oxidative coupling of methane (OCM) in a tubular continuous flow reactor were evaluated. The NaBST showed the maximum catalytic effect on methane conversion (47%), C2+ selectivity (51%) and ethylene yield (24%) at the temperature of 800 degrees C. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码:2512 / 2516
页数:5
相关论文
共 29 条
[1]   The study of composition of novel high temperature catalysts for oxidative conversion of methane [J].
Anshits, AG ;
Voskresenskaya, EN ;
Kondratenko, EV ;
Fomenko, EV ;
Sokol, EV .
CATALYSIS TODAY, 1998, 42 (03) :197-203
[2]  
Baerns M., 1989, CATAL TODAY, V4, P471
[3]   OXIDATIVE COUPLING OF METHANE OVER CHLORIDE CATALYSTS [J].
BALDWIN, TR ;
BURCH, R ;
CRABB, EM ;
SQUIRE, GD ;
TSANG, SC .
APPLIED CATALYSIS, 1989, 56 (02) :219-229
[4]   Specific defect sites creation by doping MgO with lithium and titanium [J].
Balint, I ;
Aika, K .
APPLIED SURFACE SCIENCE, 2001, 173 (3-4) :296-306
[5]  
CHAO W, 2002, CATAL TODAY, V74, P207
[6]   Factors influencing activity/selectivity of La-promoted MgO catalyst prepared from La- and Mg- acetates for oxidative coupling of methane [J].
Choudhary, VR ;
Rane, VH ;
Chaudhari, ST .
FUEL, 2000, 79 (12) :1487-1491
[7]   Oxidative coupling of methane catalyzed unexpected synergistic effect of the by rare earth oxides oxide mixtures [J].
Dedov, AG ;
Loktev, AS ;
Moiseev, II ;
Aboukais, A ;
Lamonier, JF ;
Filimonov, IN .
APPLIED CATALYSIS A-GENERAL, 2003, 245 (02) :209-220
[8]   Metal citrate polymerized complex thermal decomposition leading to the synthesis of BaTiO3:: effects of the precursor structure on the BaTiO3 formation mechanism [J].
Durán, P ;
Capel, F ;
Gutierrez, D ;
Tartaj, J ;
Bañares, MA ;
Moure, C .
JOURNAL OF MATERIALS CHEMISTRY, 2001, 11 (07) :1828-1836
[9]  
ELSHOF JE, 1995, CATAL TODAY, V25, P397
[10]   Influence of solvents on the microstructure and dielectric properties of Ba0.5Sr0.5TiO3 thin films prepared by a diol-based sol-gel process [J].
González, MB ;
Wu, AY ;
Vilarinho, PM .
CHEMISTRY OF MATERIALS, 2006, 18 (07) :1737-1744