Biomass hydrogen donor assisted microwave pyrolysis of low-rank pulverized coal: Optimization, product upgrade and synergistic mechanism

Waste Management, Journal Year: 2022, Volume and Issue: 143, P. 177 - 185

Published: March 7, 2022

Language: Английский

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The Catalytic Effect from Alkaline Elements on the Tar-Rich Coal Pyrolysis

Catalysts, Journal Year: 2022, Volume and Issue: 12(4), P. 376 - 376

Published: March 27, 2022

Tar-rich coal has been widely concerned because of its high tar yield. Two kinds tar-rich coals were studied by Thermogravimetric-Mass spectrometer-Fourier transform infrared (TG-MS-FTIR) to obtain the pyrolysis characteristics. TG-MS-FTIR was used study mass loss, gaseous compounds evolution, and functional group information during pyrolysis. Mass loss is mainly caused water release macromolecular decomposition. The results showed that there two stages in process. In addition, gas signal detected spectrometry consistent with FTIR. main products include H2, H2O, CO, CO2, CH4. effect ash content on oil-rich catalytic internal minerals are also discussed, thermal characteristics coke-rich oil put forward. provide a new idea for coal.

Language: Английский

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Purification of Quinoline Insolubles in Heavy Coal Tar and Preparation of Meso-Carbon Microbeads by Catalytic Polycondensation

Materials, Journal Year: 2023, Volume and Issue: 17(1), P. 143 - 143

Published: Dec. 27, 2023

The quinoline-insoluble (QI) matter in coal tar and pitch is an important factor affecting the properties of subsequent carbon materials. In this paper, catalytic polycondensation was used to remove QI from heavy tar, meso-carbon microbeads could be formed during purification process. results showed that AlCl3 had superior performance CuCl2, content components, including pitch, lower after polycondensation. Under condition (AlCl3 0.9 g, temperature 200 °C, time 9 h), reduce tar. small particles filtered removed, good materials obtained under 260 3 h).

Language: Английский

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Variation of molecular structures affecting tar yield: A comprehensive analysis on coal ranks and depositional environments

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

Published: Dec. 14, 2022

Language: Английский

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Experimental study on reactor scale-up for microwave-assisted pyrolysis of methyl ricinoleate

Chemical Engineering and Processing - Process Intensification, Journal Year: 2023, Volume and Issue: 184, P. 109293 - 109293

Published: Jan. 23, 2023

Language: Английский

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Experimental Study on the Damage Characteristics and Acoustic Properties of Red Sandstone with Different Water Contents under Microwave Radiation

Materials, Journal Year: 2023, Volume and Issue: 16(3), P. 979 - 979

Published: Jan. 20, 2023

Rock breaking is one of the most basic issues in deep underground engineering. Water plays an important role rock response under microwave radiation. Consequently, radiation experiments using red sandstone with different water contents were conducted. The damage characteristics and ultrasonic properties after primarily investigated, representative conclusions drawn as follows: With increase content, time complete formation rupture surface sample gradually decreased, decreasing range increased. When fracture completely formed, samples a higher content have more powdery cuttings less roughness. degree does not significantly when radiated at same time. As increased, will significantly. Through velocity test, it can be suggested that exhibits obvious zonal action microwave. Generally speaking, very effective means improving attenuation by increasing mass.

Language: Английский

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Experimental study on mechanical damage characteristics of water-bearing tar-rich coal under microwave radiation

Geomechanics and Geophysics for Geo-Energy and Geo-Resources, Journal Year: 2024, Volume and Issue: 10(1)

Published: Jan. 2, 2024

Abstract As a recognized special resource, tar-rich coal can extract the country's scarce oil and gas resources generate semi-coke that replace anthracite coking coal. The in northern Shaanxi is prominent, but due to dense structure high strength of coal, it easy cause frequent dynamic disasters mining. Therefore, realization pressure relief disaster reduction has become primary problem mining There are many shortcomings conventional methods, so new method microwave-weakening proposed. Through different water saturation treatments samples, longitudinal wave velocity degradation trend surface crack expansion law water-bearing after microwave irradiation were analyzed, softening characterization energy evolution relationship under combined action studied. Fractal dimension its internal correlation based on equivalent side length-mass sample fragments. experimental results show that: (1) Under same radiation condition, with increase saturation, deterioration physical mechanical parameters such as peak obvious. (2) After radiation, uniaxial compression damaged by load, there still residual strength, ratio elastic dissipation decreases, possibility rockburst decreases. degree specimen highest, followed water. (3) fractal inversely proportional moisture content intensity, significant positive intensity velocity. damage revealed, which aims solve weakening reducing impact hard on-site certain extent, ensure safety working face, improve efficiency It provides basic theoretical support for microwave-assisted hydraulic fracturing technology effective measures roof treatment.

Language: Английский

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Study on characterization of tri-phase products and microstructure evolution during in-situ pyrolysis of tar-rich coal at different temperatures

Fuel, Journal Year: 2025, Volume and Issue: 388, P. 134562 - 134562

Published: Feb. 3, 2025

Language: Английский

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Green Carbon for Clean Energy: Biomass‐Derived Hierarchical Structures in Energy Storage

Wiley Interdisciplinary Reviews Energy and Environment, Journal Year: 2025, Volume and Issue: 14(2)

Published: April 14, 2025

ABSTRACT The rapidly growing population is continuously putting pressure on available resources and production processes, raising two significant global challenges viz. energy crisis solid‐waste management. Both issues are responsible for the major challenge of environmental deterioration. Different categories solid waste, especially derived from agricultural industrial contribute to a large amount waste which not only contaminating environment, but its improper management threat flora fauna, including human civilization. It an essential goal circular economy ensure sustainable development by designing strategies biomass conversion into functional carbon materials, component modern nanotechnology‐based applications. This review article highlights current trends in different synthetic strategies. application biochar‐based materials high‐performance supercapacitors, rechargeable lithium‐ion batteries, air serves as catalyst improve sorption kinetics chemical solid‐state hydrogen storage ORR/OER/HER electrocatalysts several Finally, regarding actualization hierarchical technology mentioned. These should be addressed researchers well policymakers commercialize biomass‐derived material

Language: Английский

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Products distribution and heavy metals migration during catalytic pyrolysis of refinery oily sludge

Energy Reports, Journal Year: 2023, Volume and Issue: 9, P. 109 - 117

Published: April 20, 2023

The reclamation disposal of oily sludge, which is a hazardous waste from the extraction, transportation, storage, and refining crude oil, paramount challenge for environmental protection resource recycle. Herein, catalytic pyrolysis approach with participation CaO was adopted oil recovery. results show that optimal temperature recovering 500 °C, in yield 44.37%. could act as catalyst during process, thus promoting formation light components oil. increased 5.08% to 16.67% CaO. Meanwhile, addition immobilized As, Cr, Pb Zn into slag, decreasing their migration gas. Ni displayed different trend, part entered BCR continuous extraction experiments display highly biological-activity heavy metals (i.e., F1, F2 F3 form) transformed more stable state F4 form). These demonstrate not only improve quality but also reduce emission mobility metals.

Language: Английский

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