K2CO3 catalyzed CO2 gasification of ash-free coal. Interactions of the catalyst with carbon in N2 and CO2 atmosphere

Kopyscinski, Jan; Rahman, Mukhlesur; Gupta, Rajender; Mims, Charles A.; Hill, Josephine M.

doi:10.1016/j.fuel.2013.07.030

Cited by 157 publications

(157 citation statements)

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“…Some natural minerals such as olivine [23], calcite [24], and dolomite [25] were also found to be suitable for the gasification. Alkali and alkaline earth metal (AAEM) species have been extensively applied for the coal gasification due to their high catalytic activity and low cost [26][27][28][29][30][31]. Mitsuoka et al [26] investigated the catalytic effect of K and Ca on the CO 2 gasification of Japanese cypress char and the result confirmed that the additions of K and Ca effectively enhanced the reactivity of char.…”

Section: Introductionmentioning

confidence: 99%

Promoting effect of various biomass ashes on the steam gasification of low-rank coal

et al. 2014

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Section: Introductionmentioning

confidence: 99%

Promoting effect of various biomass ashes on the steam gasification of low-rank coal

et al. 2014

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“…Besides the type of the catalyst, an important factor determining its effect on the reaction is a method of adding catalytically active material to the feedstock. This occurs generally in two ways: by wet impregnation and the physical mixing [17]. The most important advantage of the first method is the ability to ensure good contact between coal and catalyst [18].…”

Section: Introductionmentioning

confidence: 99%

The influence of catalytic additives on kinetics of coal gasification process

2017

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Abstract. Catalytic coal gasification is a process that has the potential to become one of the efficient industrial technology of energy production. For this reason, the subject of this study was to analyze the kinetics of catalytic gasification of 'Janina' coal with steam. Isothermal measurements were performed at 800 °C, 900 °C, 950 °C and 1000 °C at a pressure of 1 MPa using cations of sodium, potassium and calcium as catalysts. During examination the thermovolumetric method was used. This method allows to determine the formation rates of a gaseous product such as carbon monoxide, hydrogen, methane and carbon dioxide as well as their contribution to the resulting gas. Moreover, the influence of catalysts on the kinetics of CO and H2 formation at various temperatures was determined and the kinetics parameters were calculated with the use of isoconversional model, Random Pore Model and Grain Model. The obtained results confirmed the positive effect of catalysts on the coal gasification process. The catalytic measurements were characterized by higher reaction rate and shorter duration of the process, and the calculated values of the kinetic parameters were lower than for the gasification process without the addition of catalysts.

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“…Alkali metals and alkaline earth metals catalyze the char gasification reaction of carbonaceous material [1][2][3][4][5][6][7]. The char is catalyzed by the metals through a redox mechanism during CO 2 gasification [8][9][10]. Several mechanisms have been suggested for the metals [11].…”

Section: Introductionmentioning

confidence: 99%