A mechanism investigation of synergy behaviour variations during blended char co-gasification of biomass and different rank coals

Wei, Juntao; Gong, Yan; Guo, Qinghua; Chen, Xueli; Ding, Lu; Yu, Guangsuo

doi:10.1016/j.renene.2018.07.075

Cited by 97 publications

(48 citation statements)

References 38 publications

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“…Gasification is a technique for conversion of carbon feeds to usable fuels such as H2, CO, and CH4, and is of particular interest for feeds where the by-products emitted from combustion are of concern, such as coal [1][2][3][4][5][6] or bio-wastes [7][8][9]. Metallic species in the feed materials, including calcium and potassium, can be used as intrinsic gasification catalysts [10][11][12][13][14]. Calcium can be found in feeds such as biosolids/sewage sludge [15][16][17][18], coal [19][20][21][22], and biomass [10,23,24], while potassium is found in biomass with an order of magnitude higher abundance than typically found in coal [23,25] or biosolids [26,27].…”

Section: Introductionmentioning

confidence: 99%

Effect of calcium and barium on potassium-catalyzed gasification of ash-free carbon black

Arnold

Hill

2019

Fuel

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Gasification of carbon black, an ash-free carbon feed, was performed with K2CO3 and either CaCO3 or BaCO3 as catalysts to examine their interaction. Mixtures were prepared by low-energy ball-milling, and then gasified with CO2 at 750-850 °C in a thermogravimetric analyzer. At temperatures below 800 °C, the presence of calcium had little impact on the potassium-catalyzed gasification of carbon black. At higher temperatures, calcium promoted the activity of potassium up to ~50 % conversion through the formation of a eutectic phase that increased the diffusivity of the potassium. At higher conversions, the tendency of CaCO3 to sinter and limit diffusion of CO2 to the carbon inhibited the reaction. BaCO3 also formed a eutectic phase with K2CO3 confirming that the phase change was beneficial. In contrast to CaCO3, however, BaCO3 does not sinter at 850 °C, such that gasification was promoted to complete conversion.

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Section: Introductionmentioning

confidence: 99%

Effect of calcium and barium on potassium-catalyzed gasification of ash-free carbon black

Arnold

Hill

2019

Fuel

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“…Further, biofuels are superior to fossil fuels as being renewable, non-toxic, biodegradable and producing less greenhouse gases (GHG) emissions. Finally, biomass valorisation into biofuels is projected to play a key role in circular bioeconomy via thermo/biochemical conversion technologies [ [9] , [10] , [11] , [12] ].…”

Section: Introductionmentioning

confidence: 99%

Advanced process integration for supercritical production of biodiesel: Residual waste heat recovery via organic Rankine cycle (ORC)

et al. 2021

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Biodiesel production using supercritical methanolysis has received immense interest over the last few years. It has the ability to convert high acid value feedstock into biodiesel using a single-pot reaction. However, the energy intensive process is the main disadvantage of supercritical biodiesel process. Herein, a conceptual design for the integration of supercritical biodiesel process with organic Rankine cycle (ORC) is presented to recover residual hot streams and to generate electric power. This article provides energy and techno-economic comparative study for three developed scenarios as follows: original process with no energy integration (Scenario 1), energy integrated process (Scenario 2) and advanced energy integrated process with ORC (Scenario 3). The developed integrated biodiesel process with ORC resulted in electric power generation that has not only satisfied the process electric requirement but also provided excess power of 257 kW for 8000 tonnes/annum biodiesel plant. The techno-economic comparative analysis resulted in favouring the third scenario with 36% increase in the process profitability than the second scenario. Sensitivity analysis has shown that biodiesel price variation has significant effect on the process profitability. In summary, integrating supercritical biodiesel production process with ORC appears to be a promising approach for enhancing the process techno-economic profitability and viability.

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“…The results showed that the inorganic compounds in the liquefaction residue had a catalytic effect on the pyrolysis in N 2 atmosphere and the gasification in CO 2 atmosphere. Wei et al 17,18 indicated that the addition of biomass ash had a catalytic effect on the pyrolysis and gasification of coal char. Co-pyrolysis and co-gasification were widely studied to improve the utilization efficiency of carbonaceous resources.…”

Section: Introductionmentioning

confidence: 99%

“…[14][15][16] The ash component usually played a catalytic role in gasification. Wei et al 17,18 indicated that the addition of biomass ash had a catalytic effect on the pyrolysis and gasification of coal char. Moreover, it was found that the reaction characteristics of carbonaceous could be changed after pretreatment, such as liquefaction and torrefaction.…”

Section: Introductionmentioning

confidence: 99%

A study on high‐temperature co‐gasification reactivity characteristics and kinetics analysis of Hami coal and its liquefaction residue

Guo

Huang

Gong

et al. 2019

Asia-Pacific J Chem Eng

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In this study, the rapid pyrolysis chars of Hami bituminous coal and its liquefaction residue were prepared using a high-frequency furnace. A thermogravimetric analyzer was used to investigate the gasification reactivity and determine the mixing ratio of coal and its liquefaction residue. In addition, a scanning electron microscope, a physisorption analyzer, and a laser raman spectrometer were used to characterize the physicochemical properties of samples. Furthermore, kinetics analysis using the isoconversional method was conducted. The results showed that the gasification reactivity was affected by gasification temperature, pore structure, and carbon structure. When the gasification temperature increased to 1300°C, the gasification reactivity of the liquefaction residue char was close to that of coal char. From the gasification reactivity point of view, the liquefaction residue could be utilized as a raw material in entrained-flow gasification. The mixing ratio of the raw coal to the liquefaction residue was preferably 2:1. The research on activation energy showed that the gasification process belonged to pore diffusion control in the range of temperatures investigated. Specifically, there was a synergistic effect between the coal char and the liquefaction residue char in co-gasification, which was beneficial to the gasification reaction. study on high-temperature cogasification reactivity characteristics and kinetics analysis of Hami coal and its liquefaction residue. Asia-Pac J Chem Eng. 2020;15:e2376. https://doi.

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A mechanism investigation of synergy behaviour variations during blended char co-gasification of biomass and different rank coals

Cited by 97 publications

References 38 publications

Effect of calcium and barium on potassium-catalyzed gasification of ash-free carbon black

Effect of calcium and barium on potassium-catalyzed gasification of ash-free carbon black

Advanced process integration for supercritical production of biodiesel: Residual waste heat recovery via organic Rankine cycle (ORC)

A study on high‐temperature co‐gasification reactivity characteristics and kinetics analysis of Hami coal and its liquefaction residue

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