The purpose of this research is to determine the effect of the series system on the SCWG of watercoal slurry. This paper has established an innovative series SCWG system and modeled the entire flowsheet. ... Thermodynamic study on the integrated supercritical water gasification with reforming process for hydrogen production: effects of ...
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Coal water slurry (CWS)[6], [7] refers to a suspended dispersion system containing coal, water and a small amount of additives. Because of its fluidity, CWS is easy to transport by pipeline. However, the preparation of CWS need to consume a large quantity of water, which leads to the waste of water resources.
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Hydrogen oxidizes to produce only water and has a high energy density output of 143 MJ/kg, making it a promising energy carrier for future energy systems [1][2][3] [4] [5][6]. Hydrogen gas is ...
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Numerous excellent studies have reported on energysaving through CWS electrolysis. In 1979, Coughlin and Farooque [33] investigated CWS electrolysis, where the operational cell voltage ranged from to V, surpassing the theoretical value of V but still lower than the electrolysis of water at 2021, Chen [34] investigated the influence of coal rank on coalassisted water ...
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utilization: gasification process of BDO tarcoal water slurry Lirui Mao1, Hanxu Li,1*, Yuanchun Zhang2, Chengli Wu1, ... The main production process of BDO is the Reppe method. In the ...
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The normal coal production is guaranteed and less affected by the coal slurry discharge process. Meanwhile, the water pollution problem is much addressed and the damage of coal slurry to the ...
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The liquid phase in coal slurry is mainly water, the density is 998 kg/m 3, and the viscosity is Pa s; the density of the coal slurry mixed solution is 1220 kg/m 3, and the viscosity is Pa s; the density of pulverized coal particles is 1728 kg/m 3, the particle size distribution is between and 2 mm, the particle size is set ...
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Dispersants, serving as an essential raw material in the formulation of coal water slurry, offer an economical and convenient solution for enhancing slurry concentration, thus stimulating significant interest in the development of novel and efficient dispersants. This paper intends to illuminate the evolution of dispersants by examining both the traditional and the newly conceived types and ...
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since 2015, and the 2,000 ton (coal) slurryfeed gasifier pressure is 87 bar resulting in significant operating cost and energy saving for downstream chemical process. An Air Products slurryfeed gasification system has been running on petcoke since 2000, producing ammoniabased fertilizers with all syngas CO 2 recovered and sent to a CO 2
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The opportunity of technological and modified lignosulphonate wastes, process water, oxygenized brown coal with high content huminic acid (to 60 %) with alkali usage as plasticizer agent in the coalwater slurry (CWS) production technological process was checked. The CWS stability scheme in alkali additives interaction was suggested. The ...
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Dispersants are chemical moieties that modify interfacial characteristics by adsorption at the solidliquid interface, and they have been widely used in modern industrial production. This review focuses on the research and perspectives of anionic dispersants for coalwater slurry (CWS). Various common anionic dispersants are briefly summarized, including natural and synthetic species. The ...
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The flow chart of pilot platform for refined coal production Particlesize distribution of JDCS and JDRC used for slurry preparation SEM images of coal particles: (a) JDCS, (b) JDRC and (1) at ...
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A total of eight types of organic wastewater were used in the study. Gas washing water (A), sulfur water (B), carbonized water (C) and slag discharge water (D) were the coal gasification wastewater produced by the entrained bed process; Yima wastewater (F) was coal gasification wastewater produced by the crushed coal fixed bed process (Lurgi furnace); coking wastewater (E) was produced by the ...
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One of the lots was of ultraclean coalwater slurry fuel (UCCSF) for which a twostage caustic and acid leaching procedure was developed to chemically clean the coal. As a part of the contract, AMAX R and D more » developed a conceptual design and preliminary cost estimate for a commercialscale process for UCCSF manufacture.
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It was found that activation energy of conversion is E = 103 kJ/mol and the preexponential factor is A0 = × 10 s 1. It was revealed that coal gasification in SCW without oxidants is the weakly endothermic process. The addition of CO 2 into SCW decreases the conversion rate and increases the CO yield.
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Coalassisted water electrolysis for hydrogen production can effectively reduce electricity consumption and improve the economics of electrolytic hydrogen production technology. However, the influencing factors of this process, especially the mechanism of the electrolyte itself on the coal particles, are not clear.
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A Novel ChemicalElectrochemical Hydrogen Production from Coal Slurry by a TwoStep Process: Oxidation of Coal by Ferric Ions and Electroreduction of Hydrogen Ions. ACS Omega 2022, 7 (9) ... The intensification technologies to water electrolysis for hydrogen production A review. Renewable and Sustainable Energy Reviews 2014, 29, 573588.
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Therefore, there are many methods studied for saving energy and increasing efficiency of hydrogen production [7], [8], [9]. CWS (coal water slurry) electrolysis not only could increase efficiency of hydrogen production (Faraday current efficiency closed to ) from water electrolysis [10], [11], but also could achieve purity of coal, such as ...
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Coalwaterslurry preheating technology offers another opportunity to boost energy efficiency during gasification, ... Aspen Plus is used to model the chemical production process, and GT Pro is used to model the power generation process. In Section 4, the distribution of exergy loss in the system is mapped, and the impacts of different ...
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Abstract. In this paper, based on Fluent software, a fivenozzle gasifier reactor was established to simulate the gasification process of oilbased drill cuttings coalwater slurry. The influence of concentration and oxygen/carbon atomic ratio on the gasification process of oilbased drill cuttings coalwater slurry was investigated.
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A material supplier from Belgium would like to produce limestone powder for his custome...
India is rich in various mineral resources and it is an important mineral processing market
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