Aromatization of Methane Over Mo-Fe/ZSM-5 Catalysts

被引：53

作者：

Masiero, Sara S. ^{[1
]}

Marcilio, Nilson R. ^{[1
]}

Perez-Lopez, Oscar W. ^{[1
]}

机构：

[1] Univ Fed Rio Grande do Sul, Dept Chem Engn, BR-90040040 Porto Alegre, RS, Brazil

来源：

CATALYSIS LETTERS | 2009年 / 131卷 / 1-2期

关键词：

Methane conversion; Aromatization; Benzene; Mo/ZSM-5; Fe-Mo mixed oxides; SINGLE-PASS CONVERSION; BRONSTED ACID SITES; ION ZSM-5 ZEOLITES; MO-BASED CATALYSTS; DEHYDRO-AROMATIZATION; MO/HZSM-5; CATALYSTS; W/HZSM-5-BASED CATALYSTS; NONOXIDATIVE CONDITIONS; INDUCTION PERIOD; HZSM-5; ZEOLITE;

D O I：

10.1007/s10562-009-0032-x

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：

Two groups of samples were studied for the aromatization of methane over Mo-Fe/ZSM-5 catalysts. The first group contains fixed loading (5 wt%) and variable Mo/Fe ratio. The second group was prepared with fixed Mo/Fe ratio and variable loading. The samples were characterized by TGA, S (BET), XRD, NH3-TPD and TPO analysis. NH3-TPD results indicate that the strength of strong acid sites increases when Mo/Fe ratio decreases for samples with fixed loading. The amount of strong sites decreases and new intermediate acid sites appear on samples containing both Mo and Fe. XRD results show the presence of iron molybdate for samples impregnated with both Mo and Fe. The catalytic properties of these samples were related not only to the amount and strength of acid sites but also to the iron molybdate phase.

引用

页码：194 / 202

页数：9

共 40 条

[1] Effect of Pd or Ir on the catalytic performance of Mo/H-ZSM-5 during the non-oxidative conversion of natural gas to petrochemicals [J].

Aboul-Gheit, Ahmed K. ;

Awadallah, Ahmed E. ;

El-Kossy, Salah M. ;

Mahmoud, Abdel-Lateef H. .

JOURNAL OF NATURAL GAS CHEMISTRY, 2008, 17 (04) :337-343

[2]

ARAUJO GC, 2002, QUIM NOVA, V25, P181

[3] The effect of dopants on the activity Of MoO3/ZSM-5 catalysts for the dehydroaromatisation of methane [J].

Burns, S. ;

Hargreaves, J. S. J. ;

Pal, P. ;

Parida, K. M. ;

Parija, S. .

CATALYSIS TODAY, 2006, 114 (04) :383-387

[4]

Chen L., 2001, Catal. Commun, V2, P201

[5]

Espindola JS, 2007, STUD SURF SCI CATAL, V167, P31

[6] Highly active, selective and stable Mo/Ru-HZSM-5 catalysts for oxygen-free methane aromatization [J].

Hassan, A ;

Sayari, A .

APPLIED CATALYSIS A-GENERAL, 2006, 297 (02) :159-164

[7] Study on the induction period of methane aromatization over Mo/HZSM-5: partial reduction of Mo species and formation of carbonaceous deposit [J].

Jiang, H ;

Wang, LS ;

Cui, W ;

Xu, YD .

CATALYSIS LETTERS, 1999, 57 (03) :95-102

[8] Structure and acidity of Mo/ZSM-5 synthesized by solid state reaction for methane dehydrogenation and aromatization [J].

Li, B ;

Li, SJ ;

Li, N ;

Chen, HY ;

Zhang, WJ ;

Bao, XH ;

Lin, BX .

MICROPOROUS AND MESOPOROUS MATERIALS, 2006, 88 (1-3) :244-253

[9] Combined single-pass conversion of methane via oxidative coupling and dehydro-aromatization [J].

Li, YG ;

Wu, TH ;

Shen, WJ ;

Bao, XH ;

Xu, YD .

CATALYSIS LETTERS, 2005, 105 (1-2) :77-82

[10] Combined single-pass conversion of methane via oxidative coupling and dehydroaromatization [J].

Li, YG ;

Su, LL ;

Wang, HX ;

Liu, HM ;

Shen, WJ ;

Bao, XH ;

Xu, YD .

CATALYSIS LETTERS, 2003, 89 (3-4) :275-279

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