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学者姓名:郭烈锦

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< Page ,Total 126 >
Model-based thermodynamic analysis of supercritical water gasification of oil-containing wastewater EI SCIE
期刊论文 | 2021 , 306 | FUEL
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Abstract :

Supercritical water gasification (SCWG) is a promising technology for oil-containing wastewater treatment. In this work, a non-stoichiometric two-phase (i.e., supercritical and solid phases) model is established for the thermodynamic analysis of SCWG of oil-containing wastewater. Within the model, the compositions of gaseous and solid products are calculated by minimizing the Gibbs free energy of the whole system. Peng-Robinson equation is employed to help predict the chemical potentials of gases accurately. The introduced model is first validated to fit experimental data well. Afterwards, the model is used to investigate the effects of various operating conditions on product compositions. A high temperature and a low oil concentration promote hydrogen production, instead of methane production. Additionally, it is found whether and how much char is formed greatly depends on the temperature and elemental compositions in the input stream. Moreover, the reaction heat duty and high heating value of gaseous products are analyzed. SCWG process is endothermic with a low oil concentration and can be energetically self-sustainable via adding O2 at an expense of lowering the heating value of gaseous products. The obtained results can provide useful insights on designing optimal SCWG process for treating oil-containing wastewater.

Keyword :

Thermodynamic analysis Oil-containing wastewater Supercritical water gasification Two-phase

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GB/T 7714 Xu, Jialing , Peng, Zhiyong , Rong, Siqi et al. Model-based thermodynamic analysis of supercritical water gasification of oil-containing wastewater [J]. | FUEL , 2021 , 306 .
MLA Xu, Jialing et al. "Model-based thermodynamic analysis of supercritical water gasification of oil-containing wastewater" . | FUEL 306 (2021) .
APA Xu, Jialing , Peng, Zhiyong , Rong, Siqi , Jin, Hui , Guo, Liejin , Zhang, Xiang et al. Model-based thermodynamic analysis of supercritical water gasification of oil-containing wastewater . | FUEL , 2021 , 306 .
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Electron transfer via a carbon channel for efficient Z-scheme solar hydrogen production EI SCIE
期刊论文 | 2021 , 46 (55) , 28098-28109 | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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Abstract :

Z-scheme photocatalysis provides a promising solution to photocatalytic solar water splitting, yet restricted by inferior interfacial charge transfer. Here, we demonstrate a Z-scheme composite photocatalyst made of Fe2O3, a carbon layer, and g-C3N4 that can achieve efficient hydrogen generation from solar water decomposition. The success relies on in-situ preparation of core-shell Fe2O3@C structure at the surface of g-C3N4. Carbon as an intermediate layer thus acts as a bridge that significantly accelerates the migration of photogenerated electrons from Fe2O3 conduction band to g-C3N4 valence band. As a result, the highest rate of H-2 generation reaches 5.26 mmol h(-1)g(-1). This activity is approximately 33-time greater than that achieved over pristine g-C3N4 and about 4-time larger than that obtained over a Fe2O3/g-C3N4 heterojunction without internal carbon layer. This work explicates the potential insight of the composite and paves a promising way to engineer the charge transfer behavior. (C) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

Keyword :

Charge transfer Heterojunction H-2 production Photocatalysis Direct Z-scheme photocatalyst

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GB/T 7714 Qasim, Muhammad , Liu, Maochang , Guo, Liejin . Electron transfer via a carbon channel for efficient Z-scheme solar hydrogen production [J]. | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY , 2021 , 46 (55) : 28098-28109 .
MLA Qasim, Muhammad et al. "Electron transfer via a carbon channel for efficient Z-scheme solar hydrogen production" . | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 46 . 55 (2021) : 28098-28109 .
APA Qasim, Muhammad , Liu, Maochang , Guo, Liejin . Electron transfer via a carbon channel for efficient Z-scheme solar hydrogen production . | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY , 2021 , 46 (55) , 28098-28109 .
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Flower-like MoS2 microspheres compounded with irregular CdS pyramid heterojunctions: highly efficient and stable photocatalysts for hydrogen production from water EI SCIE
期刊论文 | 2021 , 11 (37) , 23064-23072 | RSC ADVANCES
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Abstract :

An irregular CdS pyramid/flower-like MoS2 microsphere composite photocatalyst was successfully synthesized using a simple one-step hydrothermal method. The as-prepared samples were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, ultraviolet visible absorption spectroscopy, fluorescence spectroscopy and photoelectrochemical tests. The composite photocatalysts showed superior photocatalytic activities for hydrogen evolution from water under visible light irradiation (lambda >= 420 nm) with an extremely high apparent quantum yield (AQY = 64.8%) at 420 nm. To our knowledge, this value is the highest reported efficiency value for CdS/MoS2 photocatalysts. Further detailed characterization revealed that the special structure for some CdS pyramid structures dispersed in the MoS2 microsphere structures and surrounded by MoS2 nanosheets led to the photogenerated electrons migrating from the conduction band of different faces of the CdS pyramid to the conduction band of different MoS2 nanosheets while photogenerated holes remained in the CdS pyramid structures, which greatly promoted the separation of photogenerated electrons and holes, improving the photoactivity of the CdS/MoS2 catalyst. The catalyst also exhibited perfect stability, and the photoactivity displayed no significant degradation during continuous hydrogen production over nearly 70 h.

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GB/T 7714 He, Kai , Guo, Liejin . Flower-like MoS2 microspheres compounded with irregular CdS pyramid heterojunctions: highly efficient and stable photocatalysts for hydrogen production from water [J]. | RSC ADVANCES , 2021 , 11 (37) : 23064-23072 .
MLA He, Kai et al. "Flower-like MoS2 microspheres compounded with irregular CdS pyramid heterojunctions: highly efficient and stable photocatalysts for hydrogen production from water" . | RSC ADVANCES 11 . 37 (2021) : 23064-23072 .
APA He, Kai , Guo, Liejin . Flower-like MoS2 microspheres compounded with irregular CdS pyramid heterojunctions: highly efficient and stable photocatalysts for hydrogen production from water . | RSC ADVANCES , 2021 , 11 (37) , 23064-23072 .
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Response surface methodology to optimize the conditions for Enterococcus faecium YA002 producing H2 from xylose EI SCIE
期刊论文 | 2021 , 46 (9) , 6310-6320 | International Journal of Hydrogen Energy
WoS CC Cited Count: 3
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Abstract :

A bacterium was newly isolated from cow dung, and identified as Enterococcus faecium YA002 by 16S rRNA gene sequence analyzing. It showed high H2 production performance in dark fermentation with xylose as substrate, the fermentative conditions including xylose concentration, ratio of nitrogen source to carbon source in mass (N/C ratio), temperature, and initial pH were optimized by response surface methodology (RSM) with a Box-Behnken design (BBD). After regression analyzing, it could be found that H2 production was well fitted by a quadratic polynomial equation, and significantly affected by the four studied factors. The optimal conditions were xylose concentration of 22.69 g/L, N/C ratio of 0.127, temperature of 37.2 °C, and initial pH of 8.0, and the experimental H2 production under the conditions was 2918.91 ± 125.49 mL/L, which was 97.91% of the predicted H2 production. The results indicated that Enterococcus faecium YA002 was an ideal inoculum for dark fermentative H2 production from xylose, and the conditions for the H2 production were successfully optimized by response surface methodology. © 2020 Hydrogen Energy Publications LLC

Keyword :

RNA Substrates Bacilli Hydrogen production Surface properties Polynomials

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GB/T 7714 Li, Qing , An, Dan , Feng, Jiali et al. Response surface methodology to optimize the conditions for Enterococcus faecium YA002 producing H2 from xylose [J]. | International Journal of Hydrogen Energy , 2021 , 46 (9) : 6310-6320 .
MLA Li, Qing et al. "Response surface methodology to optimize the conditions for Enterococcus faecium YA002 producing H2 from xylose" . | International Journal of Hydrogen Energy 46 . 9 (2021) : 6310-6320 .
APA Li, Qing , An, Dan , Feng, Jiali , Hu, Jun , Cao, Wen , Guo, Liejin . Response surface methodology to optimize the conditions for Enterococcus faecium YA002 producing H2 from xylose . | International Journal of Hydrogen Energy , 2021 , 46 (9) , 6310-6320 .
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Recent progress of energy harvesting and conversion coupled with atmospheric water gathering EI SCIE
期刊论文 | 2021 , 246 | ENERGY CONVERSION AND MANAGEMENT
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With the advantages of environmental protection, energy saving and sustainability, the technology of energy harvesting and conversion coupled with atmospheric water gathering has gradually attracted the attention of researchers under the threat of global water and energy issues. This review paper briefly described the basic working principles of energy harvesting and conversion coupled with atmospheric water gathering technology at first and then comprehensively summarized the representative materials and corresponding devices recently developed for the generation of different kinds of energies (such as electricity and chemical energy, especially hydrogen energy) by energy harvesting and conversion coupled with atmospheric water gathering technology. Electricial energy was generated based on four effects (thermoelectric, electrokinetic, triboelectric and hydrovoltaic effects) and two processes (electrochemical and photoelectric chemical processes), while hydrogen was produced based on photoelectrochemistry, photocatalysis and photovoltaic electrolysis. Based on the above analysis, it was found that the great progress, including new mechanisms and new technical paths, has been achieved on energy harvesting and conversion coupled with atmospheric water gathering technology in the last few years, but there are still many challenges to overcome and directions to explore for further development. At last, this review paper discussed some potential strategies for promoting the output efficiency and performance of energy harvesting and conversion devices. Optimizing the materials and components used in energy harvesting and conversion devices and adding energy storage modules to achieve all-weather energy supply will push this technology into a wider range of applications and better solve the global water and energy crises.

Keyword :

Hydrogen Atmosphere water gathering Electricity Energy harvesting Energy conversion

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GB/T 7714 Chen, Zhihui , Shi, Jinwen , Li, Yueqi et al. Recent progress of energy harvesting and conversion coupled with atmospheric water gathering [J]. | ENERGY CONVERSION AND MANAGEMENT , 2021 , 246 .
MLA Chen, Zhihui et al. "Recent progress of energy harvesting and conversion coupled with atmospheric water gathering" . | ENERGY CONVERSION AND MANAGEMENT 246 (2021) .
APA Chen, Zhihui , Shi, Jinwen , Li, Yueqi , Ma, Benchi , Yan, Xueli , Liu, Maochang et al. Recent progress of energy harvesting and conversion coupled with atmospheric water gathering . | ENERGY CONVERSION AND MANAGEMENT , 2021 , 246 .
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Supercritical water gasification mechanism of polymer-containing oily sludge EI SCIE
期刊论文 | 2021 , 46 (53) , 26834-26847 | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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Abstract :

In the offshore petroleum industry, polymer-containing oily sludge (PCOS) hinders oil extraction and causes tremendous hazards to the marine ecological environment. In this paper, an effective pretreatment method is proposed to break the adhesive structure of PCOS, and the experiments of supercritical water gasification are carried out under the influencing factors including residence time (5-30 min) and temperature (400-750 degrees C) in batch reactors. The increase of time and temperature all show great promoting effects on gas production. Polycyclic aromatic hydrocarbons, including naphthalene and phenanthrene, are considered as the main obstacles for a complete gasification. Carbon gasification efficiency (CE) reaches maximum of 95.82% at 750 degrees C, 23 MPa for 30 min, while naphthalene makes up 70% of the organic compounds in residual liquid products. The highest hydrogen yield of 19.79 (mol H-2/kg of PCOS) is observed in 750 degrees C for 25 min. A simplified reaction pathway is presented to describe the gaseous products (H-2, CO, CO2, CH4). Two intermediates are defined for describing the reaction process bases on the exhaustive study on organic matters in residual liquid products. The results show that the calculated data and the experimental data have a high degree of fit and tar formation reaction is finished within 10 min. (C) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

Keyword :

Kinetics Polymer-containing oily sludge Products distribution Supercritical water gasification

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GB/T 7714 Peng, Pai , Guo, Shenghui , Li, Linhu et al. Supercritical water gasification mechanism of polymer-containing oily sludge [J]. | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY , 2021 , 46 (53) : 26834-26847 .
MLA Peng, Pai et al. "Supercritical water gasification mechanism of polymer-containing oily sludge" . | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 46 . 53 (2021) : 26834-26847 .
APA Peng, Pai , Guo, Shenghui , Li, Linhu , Jin, Hui , Ge, Zhiwei , Guo, Liejin . Supercritical water gasification mechanism of polymer-containing oily sludge . | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY , 2021 , 46 (53) , 26834-26847 .
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K2CO3-catalytic supercritical water gasification of coal with NaAlO2 addition to inhibit ash agglomeration and decrease the volatility of alkali metals EI SCIE
期刊论文 | 2021 , 303 | FUEL
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Abstract :

Supercritical water gasification (SCWG) technology is one of the most promising ways to realize efficient and clean utilization of coal because of the special physical and chemical properties of supercritical water. K2CO3 is the most preferable catalyst to improve gasification efficiency. However, K2CO3 leads to ash agglomeration and massive volatility of alkali metals. The accumulation of agglomerated ash prevents the continuous operation of the system, and the volatility of alkali metals weakens the coupling of high-grade H-2/CO2/H2O mixture with downstream process. In this study, K2CO3-catalytic SCWG of coal with NaAlO2 loading was firstly investigated in a laboratory-scale continuous reaction system to check whether NaAlO2 can inhibit ash agglomeration and lower the volatility of alkali metals without decreasing the gasification efficiency. The concentration of coal slurry was 20 wt%-35 wt% and the loading content of NaAlO2 was 0 wt%-7.5 wt% of dry coal. By doing GC, PSD, XRD, SEM and ICP-OES analysis for three-phase products collecting from the experiment, it was found that, when NaAlO2 loading increased from 0 wt% to 7.5 wt%, the carbon gasification efficiency of 20 wt%, 30 wt% and 35 wt% coal slurry improved from 90.7% to 93.9%, from 83.8% to 88.6% and from 72.6% to 80.5%, the percentage of H-2 increased and the percentage of CO2, CH4 and CO decreased. The addition of NaAlO2 transformed K and Si of coal into K(Na,K)(3)Al4Si4O16 instead of K2Si2O5, which contributes to the distribution of ash particles into smaller size. 5 wt% NaAlO2 loading decreased the total volatility of alkali metals, and 7.5 wt% NaAlO2 loading will increase the total volatility of alkali metals.

Keyword :

Volatility NaAlO2 loading Ash particle size Supercritical water gasification

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GB/T 7714 Zhang, Deming , Lu, Libo , Ren, Yifei et al. K2CO3-catalytic supercritical water gasification of coal with NaAlO2 addition to inhibit ash agglomeration and decrease the volatility of alkali metals [J]. | FUEL , 2021 , 303 .
MLA Zhang, Deming et al. "K2CO3-catalytic supercritical water gasification of coal with NaAlO2 addition to inhibit ash agglomeration and decrease the volatility of alkali metals" . | FUEL 303 (2021) .
APA Zhang, Deming , Lu, Libo , Ren, Yifei , Jin, Hui , Wei, Wenwen , Cheng, Zening et al. K2CO3-catalytic supercritical water gasification of coal with NaAlO2 addition to inhibit ash agglomeration and decrease the volatility of alkali metals . | FUEL , 2021 , 303 .
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Development of high performance anion exchange membranes for diffusion dialysis process SCIE
期刊论文 | 2021 , 221 , 281-290 | DESALINATION AND WATER TREATMENT
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In this article, the development of a series of low-cost anion exchange membranes (AEMs) for the diffusion dialysis process was carried out via the solution casting method. The synthesis of AEMs was confirmed by using Fourier transform infrared spectroscopy. The prepared membranes exhibited a dense structure. They showed an ion exchange capacity of 1.41-1.90 mmol/g, water uptake (W-R) of 15%-36%, and linear swelling ratio of 3.60%-21% at ambient temperature. They represented excellent thermal, mechanical, and chemical stability. The acid recovery performance of the prepared membranes was evaluated via diffusion dialysis process by employing a simulated mixture of HCl and FeCl2 as model feed. At 25 degrees C, the acid diffusion dialysis coefficient (U-H(+)) was found in the range of 4.5-28 (10(-3 )m/h). Moreover, the separation factor (S) was in the range of 178-305. It showed higher diffusion dialysis performance of the prepared AEMs compared to commercial membranes DF-120 (U-H(+) = 0.004 m/h, S = 24.3) under the same experimental conditions. The influence of temperature on diffusion dialysis performance of the prepared AEMs was also revealed. Therefore, the synthesized AEMs could be employed as a good candidate for acid recovery.

Keyword :

Anion exchange membranes Ion exchange capacity Diffusion dialysis Bromo-methylated poly(phenylene oxide) 4-(dimethylamino)butyraldehyde diethyl acetal

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GB/T 7714 Khan, Muhammad Imran , Su, Jinzhan , Guo, Liejin . Development of high performance anion exchange membranes for diffusion dialysis process [J]. | DESALINATION AND WATER TREATMENT , 2021 , 221 : 281-290 .
MLA Khan, Muhammad Imran et al. "Development of high performance anion exchange membranes for diffusion dialysis process" . | DESALINATION AND WATER TREATMENT 221 (2021) : 281-290 .
APA Khan, Muhammad Imran , Su, Jinzhan , Guo, Liejin . Development of high performance anion exchange membranes for diffusion dialysis process . | DESALINATION AND WATER TREATMENT , 2021 , 221 , 281-290 .
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Investigation on laminar pipe flow of a non-Newtonian Carreau-Extended fluid EI SCIE
期刊论文 | 2021 , 205 | JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
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Many fluids used in petroleum and chemical industries are generally described as complex systems that exhibit time-independent non-Newtonian behavior. To adequately represent the rheological behavior of an oil-tolerant and salt-resistant aqueous foam system, a Carreau-Extended (Carreau-E) rheological model, which includes a yield stress, a shear-thinning parameter and a time constant, has been established based on Carreau and Herschel-Bulkley models. In the present study, generalized Reynolds number definitions are proposed for laminar and fully developed pipe flow of non-Newtonian fluids (Carreau-E, Carreau, Herschel-Bulkley and Bingham fluids). Perturbation solutions for pipe flow of a Carreau-E fluid are obtained and their ranges of validity in the problem parameter space are identified. The quantitative effects of rheological parameters (e.g., yield stress, time constant, shear-thinning parameter) and flow parameters, (e.g., pressure gradient, pipe radius) on the velocity profile and flow rate in pipe flow of a Carreau-E fluid are explored. The results obtained for the flow characteristics can be applied or extended for other types of non-Newtonian fluid flow encountered in practical applications.

Keyword :

Non-Newtonian fluid Laminar pipe flow Yield stress Flow characteristics Carreau-extended fluid

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GB/T 7714 Sun, Jie , Guo, Liejin , Jing, Jiaqiang et al. Investigation on laminar pipe flow of a non-Newtonian Carreau-Extended fluid [J]. | JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING , 2021 , 205 .
MLA Sun, Jie et al. "Investigation on laminar pipe flow of a non-Newtonian Carreau-Extended fluid" . | JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING 205 (2021) .
APA Sun, Jie , Guo, Liejin , Jing, Jiaqiang , Tang, Chao , Lu, Yingda , Fu, Jiqiang et al. Investigation on laminar pipe flow of a non-Newtonian Carreau-Extended fluid . | JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING , 2021 , 205 .
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Experimental investigation on carbon microstructure for coal gasification in supercritical water EI SCIE
期刊论文 | 2021 , 306 | FUEL
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Supercritical water gasification of coal (SCWGC) has great potential for converting coal into CO2 and H-2 effectively and environmentally. For a better technological competitiveness, the conversion mechanism of carbon structure needs to be investigated in depth to achieve 100% carbon conversion for SCWGC under mild conditions. Ningxia anthracite (NX), Hongliulin bituminous coal (HLL) and Zhundong lignite (ZD) were selected as feedstock to investigate the carbon microstructure evolution for different ranks of coal gasification in super-critical water (SCW). Raman and XRD spectra were employed to investigate the carbon microstructure information of solid residues. The experimental results illustrated that coal rank had slight effect on the evolution law of carbon microstructure in coal. The process of SCWGC included three stages depending on the characteristic reactions. Inhibiting the condensation of aromatic rings under 550-750 degrees C in the third stage was the key to effectively control the ordered conversion and achieve complete conversion of carbon in the coal. Besides, the Raman and XRD spectral parameters had close relationship with carbon gasification efficiency, respectively.

Keyword :

Carbon microcrystalline structure Carbon stacking structure Gasification Supercritical water Coal

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GB/T 7714 Sun, Jingli , Feng, Huifang , Kou, Jiajing et al. Experimental investigation on carbon microstructure for coal gasification in supercritical water [J]. | FUEL , 2021 , 306 .
MLA Sun, Jingli et al. "Experimental investigation on carbon microstructure for coal gasification in supercritical water" . | FUEL 306 (2021) .
APA Sun, Jingli , Feng, Huifang , Kou, Jiajing , Jin, Hui , Chen, Yunan , Guo, Liejin . Experimental investigation on carbon microstructure for coal gasification in supercritical water . | FUEL , 2021 , 306 .
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