Dielectric Barrier Discharge Plasma-Assisted Catalytic CO2 Hydrogenation: Synergy of Catalyst and Plasma

Abstract

CO2 hydrogenation is an effective way to convert CO2 to value-added chemicals (e.g., CH4 and CH3OH). As a thermal catalytic process, it suffers from dissatisfactory catalytic performances (low conversion/selectivity and poor stability) and high energy input. By utilizing the dielectric barrier discharge (DBD) technology, the catalyst and plasma could generate a synergy, activating the whole process in a mild condition, and enhancing the conversion efficiency of CO2 and selectivity of targeted product. In this review, a comprehensive summary of the applications of DBD plasma in catalytic CO2 hydrogenation is provided in detail. Moreover, the state-of-the-art design of the reactor and optimization of reaction parameters are discussed. Furthermore, several mechanisms based on simulations and experiments are provided. In the end, the existing challenges of this hybrid system and corresponding solutions are proposed.

Sustainable Hydrogen and Ammonia Technologies with Nonthermal Plasma Catalysis: Mechanistic Insights and Technoeconomic Analysis

“…With the booming economy and rapid industrial development, the consumption of fossil fuels has released excessive exhaust gases (e.g., CO 2 and CH 4 ), which initiates serious environmental issues, such as global warming and ocean acidification . Meanwhile, multiple value-added products can be manufactured from CO 2 and CH 4 via a series of reactions, such as dry reforming of methane (DRM), CO 2 hydrogenation, and methane decomposition. ,− In comparison, DRM has drawn increasing interest in research and industry due to the following reasons: (1) Two greenhouse gases are consumed simultaneously. (2) The syngas product (a mixture of H 2 and CO) can be further transformed into methanol, gasoline, and other useful products.…”

“…With rapid industrial development, excessive CO 2 emissions have resulted in greenhouse gas effects, intensifying global warming and ocean acidification. , Methanol synthesis, a process that simultaneously stores H 2 and transforms CO 2 into value-added products has drawn tremendous attention . Relatively speaking, CO 2 hydrogenation to CH 3 OH is deemed promising since CH 3 OH is a valuable chemical intermediate and fuel .…”

“…An additional advantage is the use of electricity as the energy source, which can take advantage of excess electricity generation and store this spontaneous oversupply as chemical energy (e.g., hydrogen storage, ammonia). Moreover, the simplicity and scalability of NTP operations make them suitable for on-demand setups or to be adopted in a large-scale commercial plant …”

“…Neyts et al examined plausible catalytic mechanisms in different applications of plasma with a focus on carbon nanotubes growth and CO 2 conversions . The synergistic effects of catalytic plasma in ammonia synthesis, − dry reforming of methane, , and CO 2 hydrogenation, reactions which have received significant attention in recent years, have been reviewed.…”

Zeolite-based catalytic membrane reactors for thermo-catalytic conversion of CO2

“…However, the poor conversion rate and product selectivity in photo- and electro-catalysis restrict their large-scale application in the industry ( Sekine et al., 2016 ; Kulandaivalu et al., 2020 ). In comparison, featured with the satisfactory catalytic performances of CO 2 transformations, thermo-catalysis is more competitive, mainly including hydrogenations ( Ashok et al., 2017 , 2020a ; Ashok et al., 2020b ; Bian et al., 2020a ; Dewangan et al., 2020 ; Hongmanorom et al., 2021b , 2021a ; Pati et al., 2020 ; Yu et al., 2018a , 2018b ; Poerjoto et al., 2021 ; Li et al., 2021a ; Wai et al., 2020 ; Gao et al., 2022a , 2022b ), reforming ( Li et al., 2016 , 2020 ; Bian et al., 2017 , 2021 , 2016 , 2021 ; Bian and Kawi, 2017 ; Li and Kawi, 2018 ; Gao et al., 2020b , 2021a , 2021b , 2022a , 2022b ; Kawi et al., 2015 ; Das et al., 2020a , 2020b , 2020b ; Mo et al., 2014 ; Ashok et al., 2018 ; Kathiraser et al., 2013a , 2013b ; Hu et al., 2020 , 2021 , 2020 ) and reversed water-gas shift reaction ( Chen et al., 2020b ; Liu et al., 2020a , 2020b , 2020b ).…”