Recent advances in supercritical water gasification of biowaste catalyzed by transition metal-based catalysts for hydrogen production. (February 2022)

• Record Type: Journal Article
• Authors: Su, Hongcai; Yan, Mi; Wang, Shurong
• Is Part Of: Renewable & sustainable energy reviews. Volume 154(2022)
• Publication Date: 2022-02
• Subjects: Supercritical water gasification -- Biowaste -- Transition metal -- Catalyst -- Promotion; Renewable energy sources -- Periodicals; Power resources -- Periodicals; Énergies renouvelables -- Périodiques; Ressources énergétiques -- Périodiques; 333.794
• DOI: 10.1016/j.rser.2021.111831
• Languages: English
• ISSNs: 1364-0321

Abstract

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. Graphical abstract: Image 1 Highlights: The recent development of transition metal-based catalyst for SCWG is reviewed. Comparative analysis about the performance of various active components is provided. The effects of synthetic strategies and support materials are deeply discussed. The modification methods of transition metal-based catalysts are summarized. Future perspectives, challenges and application of catalytic SCWG are presented.