Pre-combustion mercury removal with co-production of hydrogen via coal electrolysis

Lyu, Xiang; Tao, Runming; Zhang, Tianyu

doi:10.1016/j.jes.2022.09.017

Title: Pre-combustion mercury removal with co-production of hydrogen via coal electrolysis

Journal Article · 20 July 2022 · Journal of Environmental Sciences

DOI: https://doi.org/10.1016/j.jes.2022.09.017 · OSTI ID:1994620

^[1]; Tao, Runming ^[2];

^[3]

The Ohio State Univ., Athens, OH (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Beijing Forestry Univ. (China)

Here, pre-combustion mercury removal via coal electrolysis was performed and investigated on a bench-scale coal electrolytic cell (CEC) systemically, and factorial design was used to determine the effect of different operating conditions (coal particle size, operating temperature, operating cell voltage, and flow rate of slurry) on the percentage of mercury removal, percentage of ash removal, and dry heating value change. The results showed that the operating cell voltage, as well as the interaction between operating cell voltage and coal particle size, are significant factors in the percentage of mercury removal. There is no significant factor in the percentage of ash removal and the dry heating value change, but the coal could be purified while keeping the dry heating value almost constant after electrolysis. A co-product of hydrogen could be produced during coal electrolysis with 50% lower energy consumption compared with water electrolysis. Meanwhile, a mechanism for mercury removal in coal was proposed. The facts indicate that coal electrolysis is a promising method for pre-combustion mercury removal.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1994620

Journal Information:: Journal of Environmental Sciences, Journal Name: Journal of Environmental Sciences Journal Issue: 2 Vol. 136; ISSN 1001-0742

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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54 ENVIRONMENTAL SCIENCES
ash removal
coal electrolysis
dry heating value
hydrogen production
pre-combustion mercury removal

Title: Pre-combustion mercury removal with co-production of hydrogen via coal electrolysis

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References (47)

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