Effect of high-temperature and microwave expanding modification on reactivity of coal char for char-NO interaction

Hao, Leng; Feng, Dongdong; Gao, Jianmin; Zhao, Yijun; Du, Qian; Chang, Guozhang; Guo, Qi; Wang, Xin; Sun, Shaozeng

doi:10.1016/j.scitotenv.2020.144028

Cited by 13 publications

(2 citation statements)

References 33 publications

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“…As a major climate forcing factor, CO 2 mainly generated from fossil fuel combustion and coal-fired power stations are the largest source of CO 2 emissions (Cui et al 2021;Leng et al 2021;Liu et al 2021). At present, controlling the emission of CO 2 is a key challenge for China to achieve the peak carbon in 2030.…”

Section: Introductionmentioning

confidence: 99%

Effect of demineralization on pyrolysis characteristics of LPS coal based on its chemical structure

Lin

Xue

Tao

et al. 2023

Int J Coal Sci Technol

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The critical issue in developing mature Oxy-Coal Combustion Steam System technology could be the reactivity of demineralized coal which, is closely related to its chemical structure. The chemical structures of Liupanshui raw coal (LPS-R) and Liupanshui demineralized coal (LPS-D) were analyzed by FTIR and solid-state 13C-NMR. The pyrolysis experiments were carried out by TG, and the pyrolysis kinetics was analyzed by three iso-conversional methods. FTIR and 13C-NMR results suggested that the carbon structure of LPS coal was not altered greatly, while demineralization promoted the maturity of coal and the condensation degree of the aromatic ring, making the chemical structure of coal more stable. The oxygen-containing functional groups with low bond energy were reduced, and the ratio of aromatic carbon with high bond energy was increased, decreasing the pyrolysis reactivity. DTG curve-fitting results revealed that the thermal weight loss of LPS coal mainly came from the cleavage of aliphatic covalent bonds. By pyrolysis kinetics analysis of LPS-R and LPS-D, the apparent activation energies were 76 ± 4 to 463 ± 5 kJ/mol and 84 ± 2 to 758 ± 12 kJ/mol, respectively, under different conversion rates. The reactivity of the demineralized coal was inhibited to some extent, as the apparent activation energy of pyrolysis for LPS-D increased by acid treatment.

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Section: Introductionmentioning

confidence: 99%

Effect of demineralization on pyrolysis characteristics of LPS coal based on its chemical structure

Lin

Xue

Tao

et al. 2023

Int J Coal Sci Technol

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“…Many gasification operational parameters have a great influence on the transformation to syngas, such as the type of reactor [28], [29], [30], operating temperature, equivalence ratio (ER) [31], [32], [33], and steam/biomass ratio (S/B) [34], [35], [36]. The gasification operating temperature has a direct effect on the efficiency of the process [37], [38], [39], [40], [41].…”

Section: Introductionmentioning

confidence: 99%

Design of Gasifier with Microwave-Based Technology with Steam and CO2 As Gas Agent To Produce Syngas

Rosyadi

Ula²,

Rivaldi³

et al. 2022

r.e.m

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This research is motivated by the increasing gas emissions produced by industrial, automotive and household activities which mostly use fossil energy as an energy source. CO2 capture is introduced to the use of gasification technology in an effort to reduce CO2 emissions which are one of the causes of the greenhouse effect. The role of microwave is also introduced as an effort to increase thermal efficiency and increase production and quality of syngas and its role in reducing tar which is known to be high in biomass gasification. The utilization of water vapor is also clearly disclosed and its effect on syngas products, especially hydrogen gas. The role of the parameters that affect the gasification process is analyzed to see which variant has the best role in improving the quality and quantity of syngas. Research development opportunities are presented by looking at research gaps and future prospects

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Microscopic mechanism and kinetics of NO heterogeneous reduction on char surface: A density functional theory study

Chen

Liu

et al. 2022

Energy

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Effect of high-temperature and microwave expanding modification on reactivity of coal char for char-NO interaction

Cited by 13 publications

References 33 publications

Effect of demineralization on pyrolysis characteristics of LPS coal based on its chemical structure

Effect of demineralization on pyrolysis characteristics of LPS coal based on its chemical structure

Design of Gasifier with Microwave-Based Technology with Steam and CO2 As Gas Agent To Produce Syngas

Microscopic mechanism and kinetics of NO heterogeneous reduction on char surface: A density functional theory study

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