ABSTRACT Oilfield wastewater was used to prepare coal slurry, which is called coaloilfield wastewaterslurry. The gasification properties of coaloilfield wastewaterslurry and coal water slurry were studied by using the thermogravimetry method, and the promoting effect of oilfield wastewater on gasification was also determined at the micro level. Results showed that coaloilfield ...
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This phenomenon is not conducive to the stable operation of the actual industrial production process. Thus, we first selected appropriate additives through experiments to ensure that the two highconcentration organic waste liquids can form a uniformly dispersed liquid. ... Coalwater slurry is a costeffective new technology to treat organic ...
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A numerical simulation analysis of the effects of O/C ratio and coal concentration in coal water slurry (CWS) on the flow and temperature fields of gasifier, gas composition, and carbon conversion ...
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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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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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Coal water slurry production process (equipment) to the clean, high efficiency and low energy with our country the atmosphere exceeds bid badly, leads toincreased haze weather, the coal water slurry production must be present, the domestic existing
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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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article{osti_324767, title = {Coalwater slurry fuel production: Its evolution and current status in the United States}, author = {Morrison, J L and Miller, B G and Scaroni, A W}, abstractNote = {Interest in the US in utilizing bituminous coal in a slurry form has evolved substantially over the last two decades. In the mid1970`s, technologies to utilize coaloil mixtures (COMs) as potential ...
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The prepared coalwater slurry consisted of 23% to 50% Lochiel coal and 40% Bowman's coal. The authors found that the solid concentration a ff ected the nature of the slurry, with 23% Newtonian
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Coal gasification is a key process in the production of synthetic ammonia, and the coal water slurry (CWS) pressurized gasification technology is commonly used, which adopts CWS feed and pressurized gasification in an entrained bed, and CWS reacts with oxygen at high temperature and pressure to produce syngas [3].
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During the coal mining process, underground water is generated from the longwall face. In the meantime, the coal cutting process would produce coal particles. Coal slurry is generated in the underground working site, especially for water abundant coal mines. The generated coal slurry is treated to prevent water pollution. Due to the extensively existing of the suspended solid, the traditional ...
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Results showed that coaloilfield wastewaterslurry and coal water slurry both exhibited a similar gasification process. However, compared with coal water slurry, all the gasification ...
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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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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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produced during coalassisted water,33 The process can be summarized by the following two reactions at the anode 4Fe 4Fe 4e23++−→+ (4) 4Fe C 2H O 4Fe CO (g) 4H3++++ → + ++ 2 2 2 (5) Even with the increase in the hydrogen production capacity of the coal slurry electrolysis through the improvements in the
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The temperature in the reactor was varied in the range of °C. An analysis of the composition of the gas obtained during the gasification of three fuels showed that the coalwaterslurry (40 wt% coal, 60 wt% water) was characterized by the maximum yield of H 2 ( vol%) and the minimum share of CO 2 ( vol%). The largest ...
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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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The average size of fuel droplets in the jet decreases by 512% in comparison with twocomponent coalwater fuel. Ignition delay time of a single droplet of slurry at oxidizer temperature 1273 K increases by 23% in comparison with twocomponent coalwater fuel when 10% of coal is replaced by liquid pyrolysis products.
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In terms of energy consumption, the electrolysis of coal is preferred to water electrolysis; this is because kcal of electrical energy and a reversible potential of V are required to produce 1 mol of hydrogen in water electrolysis, whereas coal electrolysis only requires kcal and V, respectively. 16,17 This is achieved because the oxygen evolution reaction, which has high ...
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The headloss characteristics of the fine (<53 μm) particulate coal water slurry are presented in Fig. 13. The headloss characteristics of the fine particulate coal water slurry is also compared with those of normal tap water. The headloss of the water is found to increase with increase in the flow velocity from to m/s.
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The three technology categories are considered as the "pulping", "pumping" and "endprocessing". The "pulping" category addresses technologies related to the production process of coalwater slurry. The "pumping" category addresses technologies related to the transport of coal slurry along a pipeline to its destination.
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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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