Studies on molybdenum carbide supported HZSM-5 (Si/Al=23, 30, 50 and 80) catalysts for aromatization of methane

被引:6
|
作者
Pasupulety, Nagaraju [1 ]
Al-Zahrani, Abdurrahim A. [1 ]
Daous, Mohammad A. [1 ]
Driss, Hafedh [1 ]
Petrov, Lachezar A. [1 ]
机构
[1] King Abdulaziz Univ, Chem & Mat Engn Dept, Fac Engn, POB 80204, Jeddah 21589, Saudi Arabia
关键词
Molybdenum carbide; Metallic molybdenum; Methane; Aromatization; Benzene; HZSM-5; DEHYDROAROMATIZATION; MO/HZSM-5; CONVERSION; BENZENE; ZSM-5; DEHYDROGENATION; AROMATICS; SITES; ACID; MO;
D O I
10.1016/j.arabjc.2020.02.016
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Here in, for the first time we are reporting molybdenum carbide reduction into metallic molybdenum during methane aromatization on HZSM-5 (Si/Al ratio = 23, 30, 50 and 80) at methane space velocity of 1800 mL.g(cat)(-).h(-). Benzene yield was influenced by the surface metallic molybdenum through the non-aromatic carbon deposits formation via linear hydrocarbons degradation on HZSM-5 with fewer acidity (Si/Al ratio = 30, 50 and 80). Our XPS analysis results demonstrated improved surface metallic molybdenum in spent Mo2C/HZSM-5 = 80 (0.71 atom. %) and 50 (0.54 atom. %) samples over Mo2C/HZSM-5 = 30 (0.33 atom. %) and 23 (0.20 atom. %) samples. Furthermore, HR-TEM and FFT analysis images clearly established fine distribution of distorted spherical shaped Mo2C particles with 6-14 nm size in spent Mo2C/HZSM-5 = 23. On the other hand, Mo2C particle size was increased upto 22 nm in Mo2C/HZSM-5 = 80. The ease reduction of Mo2C into metallic molybdenum and aggregation of Mo2C particles in spent higher Si to Al ratio (50 and 80) samples was associated with weak interactions between Mo2C and the HZSM-5 with fewer acidity. At 700 degrees C, the order of benzene yield as follows: Mo2C/HZSM-5 = 80 (2.2%) < Mo2C/HZSM-5 = 50 (3.25%) < Mo2C/HZSM-5 = 30 (5.2%) < Mo2C/HZSM-5 = 23 (8.0%). (C) 2020 Published by Elsevier B.V. on behalf of King Saud University.
引用
收藏
页码:5199 / 5207
页数:9
相关论文
共 50 条
  • [21] Promotional effect of Ru on the dehydrogenation and aromatization of methane in the absence of oxygen over Mo/HZSM-5 catalysts
    Shu, YY
    Xu, YD
    Wong, ST
    Wang, LS
    Guo, XX
    [J]. JOURNAL OF CATALYSIS, 1997, 170 (01) : 11 - 19
  • [22] Promoted effect of zinc-nickel bimetallic oxides supported on HZSM-5 catalysts in aromatization of methanol
    Jia, Yanming
    Wang, Junwen
    Zhang, Kan
    Feng, Wei
    Liu, Shibin
    Ding, Chuanmin
    Liu, Ping
    [J]. JOURNAL OF ENERGY CHEMISTRY, 2017, 26 (03) : 540 - 548
  • [23] Methane dehydrogenation and aromatization in the absence of oxygen on Mo/HZSM-5: A study on the interaction between Mo species and HZSM-5 by using Al-27 and Si-29 MAS NMR
    Liu, W
    Xu, Y
    Wong, ST
    Wang, L
    Qiu, J
    Yang, N
    [J]. JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 1997, 120 (1-3) : 257 - 265
  • [24] Solid state 13C NMR studies of methane dehydroaromatization reaction on Mo/HZSM-5 and W/HZSM-5 catalysts
    Yang, J
    Ma, D
    Deng, F
    Luo, Q
    Zhang, MJ
    Bao, XH
    Ye, CH
    [J]. CHEMICAL COMMUNICATIONS, 2002, (24) : 3046 - 3047
  • [25] Stabilization of intermediate Mo oxidation states by Nb doping enhancing methane aromatization on Mo/HZSM-5 catalysts
    Peters, Stefan
    Bartling, Stephan
    Parlinska-Wojtan, Magdalena
    Wotzka, Alexander
    Buzanich, Ana Guilherme
    Wohlrab, Sebastian
    Abdel-Mageed, Ali M.
    [J]. JOURNAL OF MATERIALS CHEMISTRY A, 2024, 12 (15) : 8869 - 8884
  • [26] Impact of the presence of Mo carbide species prepared ex situ in Mo/HZSM-5 on the catalytic properties in methane aromatization
    Rahman, Mustafizur
    Sridhar, Apoorva
    Khatib, Sheima J.
    [J]. APPLIED CATALYSIS A-GENERAL, 2018, 558 : 67 - 80
  • [27] Hβ/HZSM-5 composite carrier supported catalysts for olefins reduction of FCC gasoline via hydroisomerization and aromatization
    Fan, Y
    Bao, XJ
    Shi, G
    [J]. CATALYSIS LETTERS, 2005, 105 (1-2) : 67 - 75
  • [28] Hβ/HZSM-5 Composite Carrier Supported Catalysts for Olefins Reduction of FCC Gasoline Via Hydroisomerization and Aromatization
    Yu Fan
    Xiaojun Bao
    Gang Shi
    [J]. Catalysis Letters, 2005, 105 : 67 - 75
  • [29] Aromatization of methane by using propane as co-reactant over cobalt and zinc-impregnated HZSM-5 catalysts
    Liu, Jun Feng
    Liu, Yuan
    Peng, Liang Fu
    [J]. JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 2008, 280 (1-2) : 7 - 15
  • [30] Intrinsic kinetics of methane aromatization under non-oxidative conditions over modified Mo/HZSM-5 catalysts
    Yao, Benzhen
    Chen, Jin
    Liu, Dianhua
    Fang, Dingye
    [J]. JOURNAL OF NATURAL GAS CHEMISTRY, 2008, 17 (01): : 64 - 68