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Catalysis of carbon monoxide methanation by deep sea manganate mineralsThe catalytic activity of deep sea manganese nodule minerals for the methanation of carbon monoxide was measured with a microcatalytic technique between 200 and 460 degrees C. The manganate minerals were activated at 248 degrees 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.
Document ID
20040089999
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Cabrera, A. L.
(University of California San Diego, La Jolla 92093, United States)
Maple, M. B.
Arrhenius, G.
Date Acquired
August 21, 2013
Publication Date
January 1, 1990
Publication Information
Publication: Applied catalysis
Volume: 64
ISSN: 0166-9834
Subject Category
Exobiology
Funding Number(s)
CONTRACT_GRANT: GO2-64024
Distribution Limits
Public
Copyright
Other
Keywords
Non-NASA Center
NASA Discipline Exobiology
NASA Discipline Number 52-20
NASA Program Exobiology

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