The Coal-Forming Environment Impact on the Pyrolysis Process of Tar-Rich Coal: A Tga and In-Situ Transmission Ftir Study DOI
Qingmin Shi,

Yichen Mi,

Shuangming Wang

et al.

Published: Jan. 1, 2023

Tar-rich coal that yields oil and gas resources is abundant in northwestern China. However, due to variations the coal-forming environment, occurrence of tar-rich its key molecular structures differ across layers regions, which induces pyrolysis process these coals are different. Here, four samples with different tar indicated various facies were investigated by thermogravimetric analysis in-situ transmission FTIR. Based on comprehensive results research, have a significant effect yield controlling structure. Specifically, formed stronger reducing environment higher content aliphatic oxygen-containing functional groups, more Cal-Cal, Cal-H, Cal-O, Cal-N bonds breaking up during pyrolysis, approximately 60% total broken chemical bond content, also corresponds samples. During process, it was further observed FTIR had -CH2-, -CH-, C-O, C=O participated reaction. These showed faster thermal decomposition rate after 400 °C, high -CH2- -CH- affected changes -CH-/-CH2-, -CH-/-CH3, -CH2-/-CH3 values influence structural types groups coal. After degree reduction structure than free-ends -CH3 structures. Coal weaker significantly Additionally, formation gaseous products from closely related evolution residual accumulation increases enhancement condition environment.

Language: Английский

Pyrolysis behavior of tar-rich coal with various coal-forming environments: A TGA and in-situ transmission FTIR study DOI
Qingmin Shi,

Yichen Mi,

Shuangming Wang

et al.

Fuel, Journal Year: 2023, Volume and Issue: 358, P. 130250 - 130250

Published: Nov. 2, 2023

Language: Английский

Citations

33
Enhancing carbon dioxide uptake in biochar derived from husk biomasses: Optimizing biomass particle size and steam activation conditions DOI Creative Commons

A. Villardon,

A. Alcazar-Ruiz, Fernando Dorado

et al.

Journal of environmental chemical engineering, Journal Year: 2024, Volume and Issue: 12(5), P. 113352 - 113352

Published: June 17, 2024

This research focuses on developing activated biochars for CO2 adsorption, evaluating the impact of particle size and steam activation conditions almond shells (AS), pistachio (PS), nut (NS), three crops that are grown worldwide. A literature review was carried out characteristic parameters a biomass must have to produce biochar an acceptable quality capture CO2. Initially, physicochemical characterization selected biomasses conducted, revealing high levels volatiles (78–84 wt%), carbon (41–53 inherent metals (Ca, K, Mg Na). process involved pyrolysis under pre-established conditions, followed by adsorption analysis using thermogravimetry. Interestingly, intermediate-sized (ranging from 2 1.4 mm) exhibited higher uptake. Once optimal determined, were further optimized varying temperature. In this regard, these established at 900 °C 30 min, flow rate 0.15 mL/min pressure 1 bar. study highlighted heterogeneity, resulting in distinct morphologies (microporous PS biochars, mesoporous NS AS biochars) content compared raw materials. However, O/C H/C ratios fell as severity rose. On researching holding times constant temperature °C, similar trends observed, with biochars. Finally, based results, 2.81, 2.12 1.76 mmol/g PS, respectively, shorter (15 min)

Language: Английский

Citations

12
Hydrogen generation mechanism of oil-rich coal oxidation in low temperature DOI
Kai Wang,

Jiayou Ding,

Jun Deng

et al.

Energy, Journal Year: 2024, Volume and Issue: 293, P. 130739 - 130739

Published: Feb. 20, 2024

Language: Английский

Citations

11
Biogasification Efficiency and Molecular Constraints of Tar-Rich Coal after Microwave Radiation DOI

Yiliang Hu,

Yuan Bao, Jiahao Meng

et al.

Korean Journal of Chemical Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 9, 2025

Language: Английский

Citations

1
Biomethane production efficiency and degradation mechanism of tar-rich coal in anaerobic digestion DOI

Yiliang Hu,

Yuan Bao, Jiahao Meng

et al.

Fuel, Journal Year: 2024, Volume and Issue: 375, P. 132560 - 132560

Published: July 23, 2024

Language: Английский

Citations

7
Variation of molecular structures affecting tar yield: A comprehensive analysis on coal ranks and depositional environments DOI
Qingmin Shi, Chunhao Li,

Shuangming Wang

et al.

Fuel, Journal Year: 2022, Volume and Issue: 335, P. 127050 - 127050

Published: Dec. 14, 2022

Language: Английский

Citations

21
Characterization quality and chemical surface of Indonesian coal-based activated carbon produced in the continuity process DOI

Ika Monika,

Retno Wulan Damayanti,

Suganal

et al.

AIP conference proceedings, Journal Year: 2025, Volume and Issue: 3248, P. 020011 - 020011

Published: Jan. 1, 2025

Language: Английский

Citations

0
High-temperature treated oil-rich bedded rock layer and deterioration mechanism of heat transfer performance DOI
Yanjun Shen, Ziyi Li, Peng Cheng

et al.

Bulletin of Engineering Geology and the Environment, Journal Year: 2025, Volume and Issue: 84(3)

Published: Feb. 26, 2025

Language: Английский

Citations

0
Characteristics of Pyrolysis Products of Tar-Rich Coal Under Cryogenic Pretreatment with Liquid Nitrogen DOI Open Access
Tao Xu, Lingyun Chen, Jie Chen

et al.

Processes, Journal Year: 2025, Volume and Issue: 13(4), P. 1064 - 1064

Published: April 2, 2025

The conventional pyrolysis of tar-rich coals faces limitations in maximizing tar yield and optimizing composition, often resulting inefficient resource utilization elevated emissions CO2. This study investigates a novel cryogenic pretreatment method using liquid nitrogen to enhance efficiency, aiming improve transform quality for sustainable coal utilization. Three underwent at varying temperatures (0 −90 °C) via nitrogen, followed by pyrolysis. product distribution (tar, gas) were analyzed compared the Gray–King assay. increased 25.8–44.6% methods, achieving maximum 7.8–16.0 wt% °C. CO2 decreased 12.7–27.4%, while CH4 H2 proportions rose 15.1–60.2%, enhancing gas energy content. reduced benzene compounds 4.4–13.9 aromatic derivatives 13.9–20.5 wt%, indicating shift toward higher-value chemicals. approach demonstrates dual benefits boosting productivity reducing carbon emissions, offering promising path cleaner more efficient

Language: Английский

Citations

0
Evolution mechanism of organic macromolecular structure during lignite pyrolysis DOI Creative Commons
Ying Shi, Yanming Zhu, Zhenjiang You

et al.

Journal of Analytical and Applied Pyrolysis, Journal Year: 2024, Volume and Issue: 181, P. 106643 - 106643

Published: July 22, 2024

Understanding the mechanisms governing coal pyrolysis reactions, particularly in relation to macromolecular structure, is crucial for improving energy efficiency and facilitating transition of into a clean source. This study employs cutting-edge techniques, such as High-Resolution Transmission Electron Microscopy (HRTEM) Thermogravimetric Analysis coupled with Fourier Transform Infrared Spectroscopy Mass Spectrometry (TG–FTIR–MS), analyze lignite its residual solid samples subjected across range temperatures from 300 °C 1100 °C. The variational characteristics structure during are examined. Utilizing molecular dynamics simulations, we evolution mechanism carbon organic matter process. results show that can be divided three distinct phases: activation (30–300 °C), (300–650 condensation (650–1200 °C). During these phases, undergoes complex transformations, including folding, twisting, shedding small side chains, breaking ultimately leading directional arrangement structural fragments. units initially undergo decomposition, followed by growth alignment certain direction. spatial distribution aromatic evolves local ordering complete disordering, culminating larger-scale, three-dimensional ordering. order bond within is: oxygen-containing functional groups (such C–O COOH) > aliphatic (N–C C–C) (CC). By uncovering reaction intermediates pathways involved pyrolysis, this research provides comprehensive quantitative description These insights offer invaluable theoretical support industrial-scale coal, paving way more efficient sustainable utilization resource.

Language: Английский

Citations

2