PRETREATMENT EFFECTS ON THE ACTIVE-SITE FOR METHANE ACTIVATION IN THE OXIDATIVE COUPLING OF METHANE OVER MGO AND LI/M-GO

被引：7

作者：

COULTER, K ^{[1
]}

SZANYI, J ^{[1
]}

GOODMAN, DW ^{[1
]}

机构：

[1] TEXAS A&M UNIV,DEPT CHEM,COLLEGE STN,TX 77843

来源：

CATALYSIS LETTERS | 1995年 / 35卷 / 1-2期

关键词：

OXIDATIVE METHANE COUPLING; METHANE ACTIVATION; MGO; LI/MGO;

D O I：

10.1007/BF00807000

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 effects of high temperature pretreatments on the activity of MgO and Li/MgO catalysts for the oxidative coupling of methane have been studied. The MgO powder catalyst exhibited a turnover frequency of 3.0 x 10(-3) molecules/site s, at 990 K, whereas the Li/MgO catalyst showed a turnover frequency of 7.0 x 10(-2) molecules/site s, under the same reaction conditions. The initial C-2 formation rate was observed to increase with pretreatment temperature over the MgO catalyst, supporting our previous proposal that F-type defects are responsible for methane activation.

引用

页码：23 / 32

页数：10

共 14 条

[1] BEARNS M, 1992, PERSPECTIVES CATALYS
[2] HIGH-TEMPERATURE AND IONIZATION-INDUCED EFFECTS IN LITHIUM-DOPED MGO SINGLE-CRYSTALS
CHEN, Y
TOHVER, HT
NARAYAN, J
ABRAHAM, MM
[J]. PHYSICAL REVIEW B, 1977, 16 (12): : 5535 - 5542
[3] THE ROLE OF CARBON-DIOXIDE IN THE OXIDATIVE DIMERIZATION OF METHANE OVER LI/MGO
COULTER, K
GOODMAN, DW
[J]. CATALYSIS LETTERS, 1993, 20 (3-4) : 169 - 178
[4] COULTER K, 1992, CATAL LETT, V6, P191
[5] RADIATION DAMAGE IN MAGNESIUM OXIDE .1. DOSE DEPENDENCE OF REACTOR DAMAGE
HENDERSON, B
BOWEN, DH
[J]. JOURNAL OF PHYSICS PART C SOLID STATE PHYSICS, 1971, 4 (12): : 1487 - +
[6] OXIDATIVE DIMERIZATION OF METHANE OVER A LITHIUM-PROMOTED MAGNESIUM-OXIDE CATALYST
ITO, T
WANG, JX
LIN, CH
LUNSFORD, JH
[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1985, 107 (18) : 5062 - 5068
[7] SYNTHESIS OF ETHYLENE VIA OXIDATIVE COUPLING OF METHANE .1. DETERMINATION OF ACTIVE CATALYSTS
KELLER, GE
BHASIN, MM
[J]. JOURNAL OF CATALYSIS, 1982, 73 (01) : 9 - 19
[8] OXIDATION AND REDUCTION OF LITHIUM-CONTAINING MGO AT HIGH-TEMPERATURES
LACY, JB
ABRAHAM, MM
BOLDU, JL
CHEN, Y
NARAYAN, J
TOHVER, HT
[J]. PHYSICAL REVIEW B, 1978, 18 (08): : 4136 - 4142
[9] Lunsford J.H., 1990, CATAL TODAY, V6, P235
[10] CHARACTERIZATION OF [LI+O-] CENTERS IN LITHIUM-DOPED MGO CATALYSTS
WANG, JX
LUNSFORD, JH
[J]. JOURNAL OF PHYSICAL CHEMISTRY, 1986, 90 (22) : 5883 - 5887

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