CO<sub>2</sub> Acceptor Gasification Process

Curran, G.P.; Fink, C.E.; Gorin, E.

doi:10.1021/ba-1967-0069.ch010

Cited by 180 publications

(93 citation statements)

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“…DuMotay and Marechal used lime to enhance the gasification of carbon with steam [13]. Curran et al showed CO2 acceptor process for the gasification of lignite coal to produce H2 rich gas [14]. The synthesis of calcium cyanamide was also carried out by using the reaction between CaO and CO2 [14].…”

Section: Introductionmentioning

confidence: 99%

High temperature CO2 sorption using Ca(OH)2 in pilot scale packed column

et al. 2016

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Section: Introductionmentioning

confidence: 99%

High temperature CO2 sorption using Ca(OH)2 in pilot scale packed column

et al. 2016

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“…It should be noted that the theoretical CuO/CaCO 3 molar ratio used for the combined Ca-Cu chemical looping process should be determined taking into account the type of reducing gas used, calcination temperature (reaction enthalpies), and the equilibrium pressure of CO 2 for the decomposition of CaCO 3 . When CH 4 was used as reducing agent for the reduction of CuO, temperature of 1148 K and a CuO/CaCO 3 molar ratio of 3.2 were determined to be the theoretical condition for the simultaneous decomposition of CaCO 3 and reduction of CuO.…”

Section: Mathematical Modellingmentioning

confidence: 99%

“…The major barrier for the implementation of CCS is that the CO 2 capture process is very expensive, which accounts for over 75% of the overall CCS costs [1]. Therefore, extensive studies have been conducted on the development of cost-effective and efficient CO 2 capture technologies, and calcium looping process is one of the most promising methods that could potentially achieve near zero CO 2 emission with a low cost [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Matching of kinetics of CaCO3 decomposition and CuO reduction with CH4 in Ca–Cu chemical looping

Qin

Feng

Yin

et al. 2015

Chemical Engineering Journal

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Ca-Cu chemical looping (CaL-CLC) based on calcium looping is a novel and promising process for CO 2 capture. The concept utilizes the heat released from the exothermic reduction of CuO to support the endothermic regeneration of CaO-based sorbents. Therefore, it is important for the two major reactions to have matching kinetics. This work assesses kinetics of the two reactions in a calciner under the conditions of interest for CaL-CLC. The reaction rates of the decomposition of CaCO 3 and reduction of CuO-based material with CH 4 were measured in a TGA by varying the temperature and gas atmosphere, and two gas-solid reaction models were utilized for the determination of the kinetic parameters. On the basis of these results, a dynamic model was developed to investigate the simultaneous reduction of CuO and decomposition of CaCO 3 in an adiabatic fixed-bed reactor operating at 1 atm. The simulation resultsshowed that the reduction of CuO completed extremely fast under all test conditions, and it could lead to hot spots in the calciner. It was found that addition of steam into the reducing gas could enhance the reaction rate of CaCO 3 decomposition and help it match the fast rate of CuO reduction, then reduce the formation of hot spots. Also, steam could be used to control the movement of reaction front. Although CO 2 could be used to control the reaction front as well, the higher CO 2 partial pressure in CH 4 was found to slow down the decomposition of CaCO 3 leading to incomplete reaction.

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“…The three main advantages of such a process are the shifting of the reaction coordinate of the water-gas shift reaction to the hydrogen side and therefore an increased hydrogen yield, the integration of the heat of adsorption and the heat of the water-gas shift reaction (both are exothermic), and the possibility for in-situ CO 2 capture [64][65][66][67]. The process of CO 2 adsorption by CaO is of course not new [68], and although this application is very promising the fact that this process requires relatively mild gasification conditions (temperature of approximately 700…”

Section: Other Indirect Gasification Processesmentioning

confidence: 99%

Fluidized Bed Gasification as a Mature And Reliable Technology for the Production of Bio-Syngas and Applied in the Production of Liquid Transportation Fuels—A Review

2011

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Biomass is one of the renewable and potentially sustainable energy sources and has many possible applications varying from heat generation to the production of advanced secondary energy carriers. The latter option would allow mobile services like the transportation sector to reduce its dependency on the fossil fuel supply. This article reviews the state-of-the-art of the fluidization technology applied for the gasification of biomass aimed at the production of gas for subsequent synthesis of the liquid energy carriers via, e.g., the Fischer-Tropsch process. It discusses the advantages of the gasification technology over combustion, considers the size of the conversion plant in view of the local biomass availability, assesses the pros and cons of different gasifier types in view of the application of the product gas. Subsequently the article focuses on the fluidized bed technology to discuss the main process parameters and their influence on the product composition and the operability of the gasifier. Finally a synthesis process (FT) is introduced shortly to illustrate the necessary gas cleaning steps in view of the purity requirements for the FT feed gas.

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CO₂ Acceptor Gasification Process

Cited by 180 publications

References 0 publications

High temperature CO2 sorption using Ca(OH)2 in pilot scale packed column

High temperature CO2 sorption using Ca(OH)2 in pilot scale packed column

Matching of kinetics of CaCO3 decomposition and CuO reduction with CH4 in Ca–Cu chemical looping

Fluidized Bed Gasification as a Mature And Reliable Technology for the Production of Bio-Syngas and Applied in the Production of Liquid Transportation Fuels—A Review

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CO2 Acceptor Gasification Process

Cited by 180 publications

References 0 publications

High temperature CO2 sorption using Ca(OH)2 in pilot scale packed column

High temperature CO2 sorption using Ca(OH)2 in pilot scale packed column

Matching of kinetics of CaCO3 decomposition and CuO reduction with CH4 in Ca–Cu chemical looping

Fluidized Bed Gasification as a Mature And Reliable Technology for the Production of Bio-Syngas and Applied in the Production of Liquid Transportation Fuels—A Review

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CO₂ Acceptor Gasification Process