Partial oxidation of methane to formaldehyde over W/HZSM-5 catalysts

被引：59
|
作者：
de Lucas, A [1 ]
Valverde, JL [1 ]
Canizares, P [1 ]
Rodriguez, L [1 ]
机构：
[1] Univ Castilla La Mancha, Fac Chem, Dept Chem Engn, Ciudad Real 13004, Spain
来源：
APPLIED CATALYSIS A-GENERAL | 1998年 / 172卷 / 01期
关键词：
oxidation of methane (partial); formaldehyde; W/HZSM-5; catalyst; supported tungsten species;
D O I：
10.1016/S0926-860X(98)00114-8
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：
The partial oxidation of methane to formaldehyde using molecular oxygen as oxidant was studied over W/HZSM-5 catalysts with tungsten loading varying from 0.3% to 11.9%. The catalysts were characterized by means of XRD, UV diffuse reflectance spectroscopy, BET, TPR and TPD of ammonia. Three different types of supported species were detected: tetrahedral monomeric species, octahedral polymeric species, octahedral polymeric species and WO3 crystallites. The relative amount of each one varies significantly with the tungsten loading. At high contents, a decrease in BET areas due to the partial blocking up of the channels of the zeolite and a lessening of the number of acid sites were observed. It was found that supported tungsten oxide phase possesses active sites to partial oxidation of methane to formaldehyde. HCOH selectivity seems to be dependent on the dispersion and the nature of the tungsten oxide species in the catalyst. (C) 1998 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：165 / 176
页数：12
相关论文
共 50 条
  • [1] Partial oxidation of methane to formaldehyde over Mo/HZSM-5 catalysts
    de Lucas, A
    Valverde, JL
    Rodriguez, L
    Sanchez, P
    Garcia, MT
    [J]. APPLIED CATALYSIS A-GENERAL, 2000, 203 (01) : 81 - 90
  • [2] Activation and aromatization of methane and ethane over Mo(VI)/HZSM-5 and W(VI)/HZSM-5 zeolites catalysts
    Wang, LS
    Xu, YD
    Xie, MS
    Liu, ST
    Tao, LX
    Xu, GF
    [J]. CATALYSIS BY MICROPOROUS MATERIALS, 1995, 94 : 495 - 500
  • [3] Improved Performance of W/HZSM-5 Catalysts for Dehydroaromatization of Methane
    Nor Aishah Saidina Amin
    Kusmiyati
    [J]. Journal of Energy Chemistry, 2004, (03) : 148 - 159
  • [4] Partial oxidation of methane to formaldehyde over W/SiO2 catalysts
    de Lucas, A
    Valverde, JL
    Cañizares, P
    Rodriguez, L
    [J]. APPLIED CATALYSIS A-GENERAL, 1999, 184 (01) : 143 - 152
  • [5] THE DIRECT PARTIAL OXIDATION OF METHANE TO LIQUID HYDROCARBONS OVER HZSM-5 ZEOLITE CATALYST
    HAN, S
    MARTENAK, DJ
    PALERMO, RE
    PEARSON, JA
    WALSH, DE
    [J]. JOURNAL OF CATALYSIS, 1992, 136 (02) : 578 - 583
  • [6] Promotional effect of HZSM-5 on the catalytic oxidation of toluene over MnOx/HZSM-5 catalysts
    Huang, He
    Zhang, Chuanhui
    Wang, Lei
    Li, Genqin
    Song, Liang
    Li, Guangci
    Tang, Sifu
    Li, Xuebing
    [J]. CATALYSIS SCIENCE & TECHNOLOGY, 2016, 6 (12) : 4260 - 4270
  • [7] Methane dehydroaromatization over Mo/HZSM-5 catalysts in the absence of oxygen: effects of silanation in HZSM-5 zeolite
    Liu, HM
    Li, Y
    Shen, WJ
    Bao, XH
    Xu, YD
    [J]. CATALYSIS TODAY, 2004, 93-5 : 65 - 73
  • [8] Propane aromatization over HZSM-5 and Ga/HZSM-5 catalysts
    Bhan, Aditya
    Delgass, W. Nicholas
    [J]. CATALYSIS REVIEWS-SCIENCE AND ENGINEERING, 2008, 50 (01): : 19 - 151
  • [9] Methane Aromatization over Cobalt and Gallium -Impregnated HZSM-5 Catalysts
    Jun-Feng Liu
    Ling Jin
    Yuan Liu
    Yun-Shi QI
    [J]. Catalysis Letters, 2008, 125 : 352 - 358
  • [10] In situ DRIFTS investigation for the oxidation of toluene by ozone over Mn/HZSM-5, Ag/HZSM-5 and Mn-Ag/HZSM-5 catalysts
    Li, Jiao
    Na, Hongbo
    Zeng, Xiaolan
    Zhu, Tianle
    Liu, Zhiming
    [J]. APPLIED SURFACE SCIENCE, 2014, 311 : 690 - 696
12345