Research progress in hydrogen production from electrolytic coal slurry:Effects of coal rank and minerals,and the evolution of coal structure
Coal slurry electrolysis for hydrogen production(CSE)is a novel technology that enables electrochemical hydrogen production and the low-carbon clean utilization of coal under mild conditions.The theoretical decomposition voltage of hydrogen production from electrolyzed coal slurry is only 0.21V,and the actual energy consumption is about 1/3-1/2 of that of hydrogen production from electrolyzed water.This method has the advantages of low energy consumption,minimal pollution,and being integrated with the process of separating coal macerals and preparing coal-based fine chemicals.However,the challenges of low coal conversion rate and unclear mechanism of coal slurry electrolysis remain extremely daunting.This review discussed the current status of research on CSE mechanism,outlined the influence of coal rank and minerals on the electrooxidizing activity of CSE,summarized the changing rules of coal surface elements,functional group structure,and coal carbon skeleton structure during CSE in the anode zone,and expound the effects of electrochemical reduction in the cathode zone on the coal surface properties such as coal surface wettability and Zeta potential,as well as hydrogen production by electroreduction with the addition of coal slurry in the cathode zone and its coupling technology.The aim was to provide theoretical support for CSE in hydrogen production and low-carbon clean utilization of coal.In addition,this review also anticipated the future development direction of CSE and suggested that achieving a breakthrough in this technology relied on the development of high-performance electrode catalytic materials for CSE and the investigation of the regulation mechanism behind coal oxidation-reduction reactions.
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维普
