Recent advances in supercritical water gasification of biowaste catalyzed by transition metal-based catalysts for hydrogen production

Hongcai Su, Mi Yan and Shurong Wang

Renewable and Sustainable Energy Reviews, 2022, vol. 154, issue C

Abstract: Supercritical water gasification (SCWG) is a remarkably efficient technology for converting wet biowaste (such as food waste, paper industrial waste, sewage sludge, agricultural waste, and forestry residue) into energy in the form of hydrogen-rich syngas. Catalysts have been widely used for promoting the hydrogen production rate of SCWG at mild reaction temperatures. In this regard, transition metal-based catalysts have attracted extensive attention from researchers due to their excellent performance and recyclability. Herein, the catalytic effects of transition metal-based catalysts on the SCWG of biowaste are reviewed, including the influence of active components, synthetic methods, and support materials. The modification of transition metal-based catalysts (rare earth oxide-promoted catalysts, noble-metal bimetallic catalysts, noble-metal-free bimetallic catalysts, and alkaline-earth metal-promoted catalysts) is also discussed. Finally, technical challenges and future perspectives for the development of transition metal-based catalysts in the SCWG of biowaste are presented. This review paper aims at providing an important reference for the design of transition metal-based catalysts with excellent catalytic performance and physicochemical properties and their applications in the SCWG of biowaste.

Keywords: Supercritical water gasification; Biowaste; Transition metal; Catalyst; Promotion (search for similar items in EconPapers)
Date: 2022
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Citations: View citations in EconPapers (4)

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DOI: 10.1016/j.rser.2021.111831

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