Trends and advances in the development of coal fly ash-based materials for application in hydrogen-rich gas production:A review  

作　　者：Kang Gao Maria C.Iliuta 

机构地区：[1]Department of Chemical Engineering,Laval University,Québec,QC G1V 0A6,Canada

出　　处：《Journal of Energy Chemistry》2022年第10期485-512,I0013,共29页能源化学（英文版）

基　　金：supported by the Natural Sciences and Engineering Research Council of Canada(NSERC);the China Scholarship Council(CSC,201708130079)。

摘　　要：Coal fly ash(FA),a valuable industrial solid residue generated from coal combustion,is composed of various metal oxides and has a high thermal stability.Given that the coal-based energy will continue to account for a significant portion of global electricity generation in the coming years,the lack of effective management strategies exacerbates the threat of FA wastes to the surrounding environment and human health.For a sustainable development,green and renewable hydrogen economy and CO_(2)capture efforts provide appealing opportunities to valorize FA as catalysts and/or sorbents due to their appealing physicochemical properties.Hydrogen applications along with carbon neutrality are potential strategies to mitigate climate change crisis,but high processing costs(catalysts/sorbents)are challenging to realize this purpose.In this context,the utilization of FA not only enhances industrial competitiveness(by reducing manufacturing costs),but also provides ecologically friendly approaches to minimizing this solid waste.This state-of-the-art review highlights a wide-ranging outlook on the valorization of FA as catalysts and sorbents for hydrogen-rich gas production via conventional/intensified processes(CO_(2)/H_(2)O reforming,ammonia decomposition,hydride hydrolysis).The fundamental physicochemical characterizations and hazards/utilization of FA,which significantly affect the FA's utilization in various fields,are first introduced.The influence of several factors(like FA types and catalysis/sorption operation conditions)on the activity performance of FA-based materials is then discussed in detail.This critical review aims to open the window to further innovative ideas regarding the application of different FA residues in other catalytic and sorption processes.

关 键 词：Coal fly ash Catalyst/support High temperature CO_(2)sorbent Bifunctional material Hydrogen production Conventional/intensified process 

分 类 号：TQ536.4[化学工程—煤化学工程] O643.36[理学—物理化学] O647.33[理学—化学]