Journal ArticleDOI
Hydrogen from low-rank coals: char properties and reactivity of gasification feedstocks
TLDR
In this article, a comprehensive bench-scale study to determine and compare char reactivities and properties of three lignites, a subbituminous coal, and two bituminous coals in uncatalyzed, alkali-catalyzed and demineralized forms was carried out.Abstract:
A comprehensive bench-scale study to determine and compare char reactivities and properties of three lignites, a subbituminous coal, and two bituminous coals in uncatalyzed, alkali-catalyzed, and demineralized forms was carried out. The catalytic effect of laboratory-grade K 2 CO 3 and ferrous ammonium sulfate (FAS) and the natural minerals trona, limestone, and taconite on the reactivities of the chars were studied. Trona, limestone, and taconite improved gasification rates of the chars by 2-10 times over the rates of the uncatalyzed reactions. Reactivities were shown to correlate reasonably well with measured active sitesread more
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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
High-yield hydrogen production by catalytic gasification of coal or biomass
TL;DR: In this article, coal or wood, catalyzed by soluble metallic cations to maximize reaction rates and hydrogen yields, offers a potential for large-scale, economical hydrogen production with near-commercial technology.
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Fluidized bed gasification of lignite char with CO2 and H2O: A kinetic study
TL;DR: In this article, a predictive kinetic model for both CO 2 and H 2 O gasification of the lignite char was developed from the experimental results, that was able to correctly predict the evolution of carbon conversion versus time.
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CFD simulation of fuel reactor for chemical looping combustion of Indian coal
TL;DR: In this paper, the computational fluid dynamics (CFD) studies of the fuel reactor for high ash (Indian) coal are presented and the reactions involving coal devolatilization, gasification and metal oxides reduction are incorporated.