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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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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In this work, the pyrolysis behavior of coalwater slurry and coaloilwater slurry at various temperatures of °C in a fixed bed reactor was studied. For the pyrolysis of coalwater slurry and coaloilwater slurry, the increase of pyrolysis temperature and water content promoted an increase in gas production but resulted in a ...
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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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Municipal sewage sludge always includes considerable amount of water, noxious substances, and varying chemical compositions; therefore, sludge utilization is imposed. Coalsludge slurry (CSS), which is made by blending sewage sludge with coal, water, and additives, is being identified as a new and effective sludge utilization technology. The main objectives of the present investigation are ...
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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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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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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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This study investigated the process and mechanism of synergistically assisted hydrogen production from tailings and coal slurry. We have identified the optimal tailings as leadzinc tailings through experimentation with different tailings mixed with pulverized, we have analyzed the electrochemical properties of Fe 2+ and Fe 3+ at different concentration gradients in a ...
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(b) In the industrial application process, the active component of the syngas produced from the gasification of the coal mixed wastewater slurry can reach % and has a higher H2 content than ...
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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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Coal is one of the most important fossil fuels in the world. In recent years, the demand for fossil fuel energy has increased. Coal water slurry (CWS) is composed of approximately 6075% coal, 2540% water, and 1% additives; it is environmentally friendly At present, the anionic additives used in industrial applications include naphthalenesulfonates, aliphatic sulfonates, lignin sulfonates ...
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The production process and physical picture of BDO tar. Depending on BDO's largescale production capacity, BDO tar should increase. ... Preparing coal water slurry from BDO tar to achieve resource utilization: combustion process of BDO tarcoal water slurry. Energy Fuels, 33 (2019), pp. .
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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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Methanol is an important feedstock of chemical engineering and energy source, and it is mainly produced by coal route in China. The coaltomethanol suffers from serious CO 2 emissions and carbon resource waste since water gas shift is involved in this process to increase hydrogen content of syngas for meeting methanol novel coaltomethanol process integrated with cokeoven gas ...
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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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Coal water slurry (CWS), a highlyloaded suspension of coal in water, is regarded as one of the most important alternatives for fuel oil. Generally, additives are required for the preparation of CWS, of which polycarboxylate (PC) is the most promising and applicable one. ... Coal plays a vital role in maintaining the economic growth process ...
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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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1. Introduction. Coal has long been used as a fossil fuel to meet a significant proportion of the world's electricity needs (Blissett and Rowson, 2012; Cao et al., 2016).Despite its wide range of applications, the efficiency of converting coal into electricity is often less than 40%, and its extensive use raises a number of environmental concerns (Jewell et al., 2019; Liu et al., 2005).
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Municipal sludge (MS) is used to prepare coal water slurry (CWS). This practice is beneficial for resource utilization and reduces treatment costs and environmental pollution. In this study, alkalimodified municipal sludge (AMS) was prepared with Ca(OH)2 as modifier and mixed with coal to produce AMSCWS. The effect and mechanism of MS and AMS on slurry ability, stability, and combustion ...
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