CATALYSIS OF CARBON-MONOXIDE METHANATION BY DEEP-SEA MANGANATE MINERALS

被引:14
作者
CABRERA, AL [1 ]
MAPLE, MB [1 ]
ARRHENIUS, G [1 ]
机构
[1] UNIV CALIF SAN DIEGO, SCRIPPS INST OCEANOG, INST PURE & APPL PHYS SCI, LA JOLLA, CA 92093 USA
来源
APPLIED CATALYSIS | 1990年 / 64卷 / 1-2期
关键词
carbon monoxide methanation; catalyst characterization (active and BET surface area); hydrogen desorption; manganese nodules; sea minerals; syngas conversion;
D O I
10.1016/S0166-9834(00)81568-7
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 catalytic activity of deep sea manganese nodule minerals for the methanation of carbon monoxide was measured with a microcatalytic technique between 200 and 460°C. The manganate minerals were activated at 248°C by immersion into a stream of hydrogen in which pulses of carbon monoxide were injected. Activation energies for the methanation reaction and hydrogen desorption from the manganate minerals were obtained and compared with those of pure nickel. Similar energy values indicate that the activity of the nodule materials for the reaction appears to be related to the amount of reducible transition metals present in the samples (ca. 11 wt.-%). Since the activity of the nodule minerals per gram is comparable to that of pure nickel, most of the transition metal ions located between manganese oxide layers appear to be exposed and available to catalyze the reaction. © 1990.
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页码:309 / 320
页数:12
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