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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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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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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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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Chu et al. [21] studied the mechanism of modified sludgecoal water slurry (MSCWS) and significantly improved the fluidity and stability of the slurry. Zhang et al. [22] used a coal chemical sludge as raw material and mixed it with lignite, coking coal and lean coal to prepare SCWS; it was shown that the addition of appropriate proportion of ...
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In the production process, noncompliant wastewater was treated and reused in industrial production, which can greatly reduce the consumption of fresh water and lessen pollutant emissions [4], [5]. Coal water slurry (CWS) [6], [7] refers to a suspended dispersion system containing coal, water and a small amount of additives.
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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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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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Of the different additives, the viscosity reduction effect of Tween 80 in the waste oilcoalwater slurry was best. Further, the comprehensive performance of the waste oilcoalwater slurry, including slurry ability, stability and fluidity, was found to be best at a water content of 10% and a Tween 80 content of 5%.
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To improve the efficiency of the gasification or combustion process of coal water slurry (CWS), it is significant to optimize the rheological properties and increase the solid concentration of CWS. Particularly, preparing CWS from low quality coal remains a peculiarly intriguing subject due to the large reserve and low price of low quality ...
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Coalwater slurry fuel is a fuel that is domestic, in large supply, can be handled like a liquid, burns like coal, costs like coal, and has the potential as a near term alternative to No. 6 fuel oil. Unlike the coal gasification and liquefication processes, the capital investment required is modest. While those synthetic fuel processes cost in ...
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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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Coal water slurry (CWS) It is used as fuel and considered as forefather of coal . In the ladder the next step is lignite which has a calorific value of BTU per pound and moisture content is of 2535%. It is used for electricity generation. : The next grade is subbituminous which contains heating value of 8300 to 13,000 BTU/pound ...
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Coalwater slurry or coalwater mixture (CWS or CWM) is a complex solidliquid dispersion. Several research works have been done concerning the production and use of CWSs being developed worldwide in several different governmental, industrial and academic facilities. In the present paper, studies on the developments achieved in the past three decades with regard to the field mentioned ...
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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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Simplified block diagram of gasification process for syngas production. Coal slurry is first prepared by crushing the coal to a size of mm particle diameter along with water addition. The coal slurry is the pumped to the gasifier where the reactions take place in the controlled amount of oxygen.
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Abstract. Coalassisted water electrolysis can reduce the electricity consumption of traditional water electrolysis by 4060%, but the rate of hydrogen production in this process is very slow. Some coal gasification wastewater can promote the electrical oxidation of coal, the addition of which can achieve resource utilization of wastewater ...
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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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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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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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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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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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The EGas process uses a coalwater slurry feed into an upflow, entrained flow gasifier ... This chapter presents studies on oxidized coal for the production of coalwater slurry. In a study described in the chapter, about 10 g of a lowrank bituminous coal was refluxed with 200 ml of 3(N)HNO 3 for 5 h. The treated coal was cooled ...
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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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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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Coal water slurry product was more competitive or cheaper than MFO in terms of fuel cost in power plants. Fuel cost of coal water slurry product was USD million/year, and MFO was USD million/year. Based on the result of the study above, the coal water slurry process is feasible to be implemented with adequate infrastructure support
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During the coal boom of the 1970s, slurry pipelines were proposed as an alternative to rail transport. Coal would be crushed, then mixed with water to create a slurry and sent via pipeline to its destination, where the mixture was dried, then burned. When in the pipeline, the slurry moved along at a leisurely four miles an hour.
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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 (CWS) is an important cleancoalbased liquid fuel with the characteristics of highefficiency and lowpollution. This paper aims to implement the principles of clean production and prepare CWS by coblending coal particles and polyethylene terephthalate (PET) microplastics.
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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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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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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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