Desulfurization of coal by an electrochemical-reduction flotation technique

Zhao, Wei; Xu, Weibing; Zhong, S.; Zong, Zhi‐Min

doi:10.1016/s1006-1266(08)60296-5

Cited by 32 publications

(24 citation statements)

References 9 publications

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“…Electrochemical desulfurization (ECDS) technology has been explored to remove sulfur by electrochemical oxidation or the reduction of sulfur compounds in fossil fuels. [60][61][62][63][64][65] This technology is able to remove sulfur at relatively low temperatures and pressures, which potentially makes the process much less energy intensive and more economical than conventional technologies. In ECDS, there is also a degree of freedom to control products by adjusting the applied potential.…”

Section: Electrochemical Reductionmentioning

confidence: 99%

“…[72][73][74][75][76][77] The electrochemical cathodic reduction of organic sulfur compounds (expressed as R-SH) leads to the formation of H 2 S, as shown in eqn. (7):…”

Section: Common Electroreductionmentioning

confidence: 99%

“…Physical processes such as froth flotation and magnetic force separation can only remove a portion of pyritic sulfur but cannot reduce organic sulfur. [5][6][7][8] Besides, some physical processes are not cost effective methods. 9 Microbial desulfurization of coal is usually carried out with chemolithoautotrophic bacteria such as T. thiooxidans and T. ferrooxidans.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Recent advances of sodium borohydride reduction in coal water slurry desulfurization: integration of chemical and electrochemical reduction

et al. 2012

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Clean fuel technologies have been widely developed in current society because fuel combustion can directly bring about the emission of hazardous gasses, i.e. SO 2 , sulfate particulate matter (SPM), resulting in environmental pollution and other related problems that endanger public heath and community property; as well as reducing the life of the engine due to corrosion. The research efforts for developing conventional hydrodesulfurization (HDS) and alternative desulfurization methods such as selective adsorption, biodesulfurization, oxidation/extraction (oxidative desulfurization), etc. for removing these refractory sulfur compounds from liquid fuel products are on the rise. The reductive desulfurization method under ambient conditions has rarely been researched. This paper reviews the current status of various desulphurization techniques being studied worldwide. It presents an overview of novel emerging technologies of chemical and electrochemical reduction (CECR) for deep desulfurization of coal water slurry (CWS) so as to provide a new way of thinking about ultraclean fuel technology.

show abstract

Section: Electrochemical Reductionmentioning

confidence: 99%

“…[72][73][74][75][76][77] The electrochemical cathodic reduction of organic sulfur compounds (expressed as R-SH) leads to the formation of H 2 S, as shown in eqn. (7):…”

Section: Common Electroreductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Recent advances of sodium borohydride reduction in coal water slurry desulfurization: integration of chemical and electrochemical reduction

et al. 2012

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“…Physical desulfurization methods can only remove inorganic sulfur and are economical and practical in nature. 14,15 High-gradient magnetic separation technology is an effective method for physical desulfurization, which can be used to deal with fine particles of paramagnetic minerals and is applied to the desulfurization of fine coal (mainly pyrite). 16,17 The magnetic properties of pyrite can be improved by heating treatment.…”

Section: Introductionmentioning

confidence: 99%

Clean Desulphurization of High-Sulfur Coal Based on Synergy Effect between Microwave Pretreatment and Magnetic Separation

Zhu

Zhang

et al. 2018

ACS Omega

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Coal is the world’s second largest energy resource and the primary energy resource in China. Coal-fired power generation is the dominant source for obtaining power both in China and the world. This situation is considered to remain unchanged for the coming few decades. The paper is to study the mechanism of microwave absorption capacity of the magnetic medium. A mechanism for the microwave energy absorption of fine coal is proposed by obtaining the parameters of dielectric properties of the magnetic medium. The prediction model of electromagnetic parameters during the process of microwave dielectric enhancement of fine coal is established by using the neural network method. The content of magnetic medium, by increasing the electromagnetic parameters to improve the energy utilization rate and reduce energy loss, can effectively improve the absorption and broaden bandwidth of the coal sample, improving the frequency adaptive design of coal by the microwave pretreatment process. A neural network model for the prediction of the electromagnetic parameters of fine coal is established by using the neural network method. The desulfurization rates were 23.99 and 45.78% for Weinan and Lu’an coals, respectively.

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“…Electrochemical desulfurization (ECDS) technology has been explored to remove sulfur by the electrochemical oxidation or reduction of sulfur compounds in fossil fuels [5][6][7]. This technology is able to remove sulfur at relatively low temperatures and pressures, which potentially makes the process much less energy intensive and more economical than conventional technologies.…”

Section: Introductionmentioning

confidence: 99%

A review of electrochemical desulfurization technologies for fossil fuels

Lam

Song

et al. 2012

Fuel Processing Technology

104

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Desulfurization is an important process for crude oil upgrading. Electrochemical desulfurization technologies have advantages over conventional hydrodesulfurization technologies in terms of low temperature and pressure operation with high product selectivity and therefore less energy consumption. In this paper the authors reviewed the research done in the past decades on electrochemical desulfurization for fossil fuels. The principles, electrochemical methods, electrochemical reactors, catalysts and electrolytes employed in the electrochemical desulfurization process were discussed; and future research work is recommended.Crown

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Desulfurization of coal by an electrochemical-reduction flotation technique

Cited by 32 publications

References 9 publications

Recent advances of sodium borohydride reduction in coal water slurry desulfurization: integration of chemical and electrochemical reduction

Recent advances of sodium borohydride reduction in coal water slurry desulfurization: integration of chemical and electrochemical reduction

Clean Desulphurization of High-Sulfur Coal Based on Synergy Effect between Microwave Pretreatment and Magnetic Separation

A review of electrochemical desulfurization technologies for fossil fuels

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