Journal ArticleDOI
Low temperature gasification of brown coals catalysed by nickel
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Nickel catalyst exhibited an extremely high activity in the gasification of some low rank coals at a temperature as low as 750 K as discussed by the authors, and approximately 85% of Yallourn coal was converted within 30 min in steam at 773 K. But hydrogen sulphide was strongly adsorbed on the nickel catalyst and retarded this reaction.About:
This article is published in Fuel.The article was published on 1983-02-01. It has received 66 citations till now. The article focuses on the topics: Coal & Nickel.read more
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Gasification of a South Australian low-rank coal with carbon dioxide and steam: kinetics and reactivity studies
TL;DR: In this article, an experimental gasification study of Bowmans coal with steam and with carbon dioxide in a single-particle reactor operating at atmospheric pressure and at temperatures between 714 and 892°C was conducted.
Journal ArticleDOI
The Mechanism of the Catalytic Gasification of Coal Char: A Critical Review
Bernard Wood,Kenneth M. Sancier +1 more
TL;DR: In this article, the authors present an overview of the available information on the mechanism of catalytic catalytic gasification catalyst action, and discuss the need to collate, summarize, and interpret this information.
Journal ArticleDOI
Catalytic effects observed during the co-gasification of coal and switchgrass
TL;DR: In this article, a series of CO2-char gasification tests were performed in a thermogravimetric analyzer (TGA) to evaluate the catalytic activity of alkali-rich biomass-derived materials.
Journal ArticleDOI
Calcium catalysed steam gasification of Yallourn brown coal
Yasuo Ohtsuka,Akira Tomita +1 more
TL;DR: In this paper, a steam gasification of calcium-loaded Yallourn coal has been carried out with a thermobalance, and it was shown that the interconversion between calcium carbonate and oxide takes place readily in the gasification temperature region.
Journal ArticleDOI
Highly active catalysts from inexpensive raw materials for coal gasification
Yasuo Ohtsuka,Kenji Asami +1 more
TL;DR: In this article, the authors focus on novel methods of converting inexpensive raw materials to active catalysts for low-temperature coal gasification, which can produce clean fuels and valuable feedstock with high thermal efficiency.
References
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Journal ArticleDOI
Hydrogenation of carbons catalyzed by transition metals
Akira Tomita,Yasukatsu Tamai +1 more
TL;DR: In this article, the catalytic activities of transition-metal catalysts in methane formation from carbons were investigated at temperatures up to 1050 °C under atmospheric pressure of hydrogen, and it was shown that methane was produced in several stages and the temperature of maximal rate varied from one metal catalyst to another.
Journal ArticleDOI
Enhancement of lignite char reactivity to steam by cation addition
TL;DR: In this article, a raw lignite has been treated with HCl and HF to demineralize it and to increase its carboxyl content prior to exchanging selected cations with the hydrogen on the Carboxyl groups.
Journal ArticleDOI
Hydrogenation of carbons catalyzed by nickel, platinum and rhodium
TL;DR: In this paper, the activation energy for a nickel-catalyzed reaction at 540°C was estimated as 25 kcal/mole, and the reaction occurred in two stages as observed thermogravimetrically.
Journal ArticleDOI
Letter to the editorLow-temperature gasification of Yallourn coal catalysed by nickel
Akira Tomita,Yasukatsu Tamai +1 more
Journal ArticleDOI
Extracting metals from ammoniacal solution with low rank coals
TL;DR: In this paper, the amount of metals adsorbed from ammoniacal solutions of the metal sulfates and carbonates was determined from analysis of the solutions before and after contacting, and it was found that metal loadings increase with increases in contact time, liquid to solid ratio and with metal concentration at short contact times, but loadings decrease with increasing coal particle size, ammonium ion concentration and with metals concentration at long contact times.