Journal ArticleDOI
Effect of lignite pyrolysis conditions on calcium oxide dispersion and subsequent char reactivity
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TLDR
In this article, a demineralized North Dakota lignite was loaded with 2.9 wt% Ca by ion exchange and X-ray diffraction analysis was carried out to obtain information on the state and dispersion of the Ca species on the various chars.About:
This article is published in Fuel.The article was published on 1983-02-01. It has received 107 citations till now. The article focuses on the topics: Char & Pyrolysis.read more
Citations
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A Kinetic Model of Carbon Burnout in Pulverized Coal Combustion
TL;DR: The Carbon Burnout Kinetic Model (CBK) as mentioned in this paper is a coal-general kinetics package that is specifically designed to predict the total extent of carbon burnout and ultimate fly ash carbon content for prescribed temperature/oxygen histories typical of pulverized coal combustion systems.
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Factors affecting the reactivity of coal chars during gasification, and indices representing reactivity
TL;DR: In this paper, the authors reviewed literature data for the rate of gasification of coal chars with oxygen, CO2 and steam and clarified the factors controlling this process. But, they did not consider the effect of the number of active sites in the coal matrix.
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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.
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Structural and compositional transformations of biomass chars during combustion
TL;DR: In this paper, the physical and chemical transformations of biomass chars during combustion were investigated in a laminar flow reactor at 1600 K in order to obtain time-resolved data on structural and compositional transformations of the biomass chars.
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A review of catalysts for the gasification of biomass char, with some reference to coal
TL;DR: The most prevalent metal naturally in biomass char is potassium, which is not only inherently active, but volatilises to become finely distributed throughout the char mass as discussed by the authors, and the formation of an active carbon/potassium complex is frequently proposed.
References
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Journal ArticleDOI
Reactivity of heat-treated coals in air at 500 °C
TL;DR: In this paper, the reactivity of lignite coal was measured by a gravimetric method and the results showed that lower-rank coal chars are more reactive than those prepared from high-rank coals.
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Reactivity of heat-treated coals in carbon dioxide at 900 °C
Edwin J. Hippo,Philip L. Walker +1 more
TL;DR: In this article, the reactivity of sixteen 40 × 100 mesh U.S. coals charred to 1000 °C were measured in carbon dioxide at 900 °C and showed that magnesium and calcium are important to char reactivity.
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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.
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Reactivity of heat-treated coals in steam
TL;DR: In this article, the authors measured the reactivity of seventeen 40 × 100 mesh (U.S.) coals charred to 1000 °C in 0.1 MPa of a N2H2O mixture containing water vapour at a partial pressure of 2.27 kPa.