Kinetics of petroleum coke/biomass blends during co-gasification

Zhang, Jianliang; Guo, Jian; Wang, Guangwei; Xu, Tao; Chai, Yifan; Zheng, Chang-le; Xu, Runsheng

doi:10.1007/s12613-016-1317-x

Cited by 41 publications

(5 citation statements)

References 21 publications

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“…Gasification of biomass generally contains in two stages: 1) pyrolysis of the feedstock to produce volatiles and biochar, and 2) secondary cracking of volatile matters and gasification of biochar to produce syngas. The biochar gasification is the committed step, which is due to its low conversion rate and higher activation energy compared to the raw material pyrolysis stage [21]. The reaction kinetics are critical in process development, as they provide important parameters for reactor design and process modelling [22].…”

Section: Introductionmentioning

confidence: 99%

Kinetic study on the CO2 gasification of biochar derived from Miscanthus at different processing conditions

Tian

Wang

et al. 2021

Energy

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CO 2 gasification is an emerging process that can improve the quality of syngas and enhance the CO 2 circular utilisation. This paper presents an analysis on the CO 2 gasification of Miscanthus-derived biochar produced at various processing conditions. The gasification behaviour, kinetics and biochar reactivity were investigated and the correlations to the biochar preparation condition and their microstructure were developed. Results showed that the preparation and gasification reaction conditions had major impact on the biochar reactivity.The order of significance that affected the biochar reactivity was gasification temperature, biochar preparation temperature and processing atmosphere. Increasing heating rate could enhance the biochar reactivity, while increasing preparation temperature could reduce the reactivity in N 2 and He atmosphere. At 600 and 1000 °C, He atmosphere produced the most activity biochar, followed by N 2 and CO 2 . At 800 °C, CO 2 atmosphere gave the highest reactivity, followed by He and N 2 . The Activation Energy (E) of gasification reaction calculated by the Hybrid Model was mainly in the range of 78.09-212.46 kJ mol -1 . The E decreased with the increase of carbon conversion rate. A great kinetic compensation effect between E and A was identified during the CO 2 gasification process.

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Section: Introductionmentioning

confidence: 99%

Kinetic study on the CO2 gasification of biochar derived from Miscanthus at different processing conditions

Tian

Wang

et al. 2021

Energy

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“…At present, most studies have been focused on gas and liquid products characteristics from the thermal conversion of Miscanthus, but there is limited research on the characteristics of Miscanthus char particularly in the view of application as fuel in terms of further thermal conversion. Zhang et al [8] reported that biomass gasification process occurred in two stages: pyrolysis and char gasification, and the activation energy in the pyrolysis stage was less than that in the char gasification stage. Tong et al [9] revealed that the gasification of biomass is contained the stage of water evaporation, pyrolysis and char gasification.…”

Section: Introductionmentioning

confidence: 99%

Steam gasification of Miscanthus derived char: the reaction kinetics and reactivity with correlation to the material composition and microstructure

Tian

Wang

et al. 2020

Energy Conversion and Management

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This work presents a comprehensive study on the steam gasification kinetics and reactivity of Miscanthus chars (MC) prepared at different temperatures (600 °C, 800 °C and 1000 °C) with the correlations to their composition and microstructure. The results showed that the order of gasification reactivity was MC600 > MC800 > MC1000, and the microcrystalline structure and the content of inherent alkali and alkaline earth metals in the MC were the main factors affecting their reactivity under steam gasification. The reactivity also increased with the increase of gasification temperature, and the effect of gasification temperature on the reactivity of MC was far greater than that of the char production temperature. High heating rate could also effectively promote the gasification reactivity of MC. The kinetics of the steam gasification process were analyzed by different modelling methods. The Random pore model (RPM), among the three methods compared, was the most suitable one to describe the kinetics of isothermal gasification process, of which, the activation energies were in the range of 176-203 kJ/mol with a good kinetic compensation effect between activation energy and pre-exponential factor. The master-plots method proved that the F 2 mechanism was suitable for describing the early stage (X<50%) of the MC gasification reaction, and the D 1 mechanism was suitable to the late stage (X >50%) of the MC gasification process.

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“…Using coconut shells as a reducing agent, the process can solve environmental problems by replacing the use of coal and reducing the burden of dumping agricultural waste and iron ore cover. Zhang, J.L et al [51] used biochar to rapidly reduce iron ore. It was found that the reduction temperature was 106 • C lower than that of pulverized coal and 208 • C lower than that of coke powder.…”

Section: Application Of Biochar In Iron Ore Reductionmentioning

confidence: 99%

Review on the Application and Development of Biochar in Ironmaking Production

Wang,

Chai,

Wang

et al. 2023

Metals

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In recent years, the concept of green, low-carbon and clean energy consumption has been deeply rooted in the hearts of the people, and countries have actively advocated the use of new energy. In the face of problems such as resource shortage and environmental pollution, we began to explore the use of new fuels instead of coal for production. Biomass resources have the characteristics of being renewable and carbon neutral and having large output. As an energy utilization, it is helpful to promote the transformation of the energy structure in various countries. Applying it to ironmaking production is not only conducive to energy conservation and emission reduction in the ironmaking process but also can achieve efficient utilization of crop waste. By introducing the source and main preparation methods of biochar, this paper expounds the main links and advantages of biochar in the ironmaking process and puts forward the direction of biochar in ironmaking in the future.

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Kinetics of petroleum coke/biomass blends during co-gasification

Cited by 41 publications

References 21 publications

Kinetic study on the CO2 gasification of biochar derived from Miscanthus at different processing conditions

Kinetic study on the CO2 gasification of biochar derived from Miscanthus at different processing conditions

Steam gasification of Miscanthus derived char: the reaction kinetics and reactivity with correlation to the material composition and microstructure

Review on the Application and Development of Biochar in Ironmaking Production

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