Recent advances in CO2 hydrogenation to value-added products — Current challenges and future directions

• DOI: 10.1016/j.pecs.2021.100905
• Publication Date: 2021-03-13T23:14:34Z
• Authors: Samrand Saeidi; Sara Najari; Volker Hessel; Karen Wilson; Frerich J. Keil; Patricia Concepción; Steven L. Suib; Alírio E. Rodrigues
• Keywords: 13. Climate action; 7. Clean energy; 01 natural sciences; 0104 chemical sciences

Climate change, global warming, fossil fuel depletion and rising fuel prices have created great incentives to seek alternative fuel production technologies. CO transformation to value-added products using renewable H has proven to be an emerging solution to enable this goal. In this regard, three different promising processes, namely methane, methanol and hydrocarbon synthesis via CO hydrogenation are thoroughly discussed. In addition, the influential factors affecting process efficiencies such as catalyst design and mechanistic insight, operating conditions as well as reactor types are investigated, with key pathways that dictate catalyst activity and selectivity of the most promising materials described. Furthermore, a brief overview of the reactor configuration and its crucial role in the improving process viability is analyzed. Accordingly, fixed-bed, fluidized-bed, annular and spherical reactors along with HO/H perm-selective membrane reactors are disscussed for hydrocarbon production. In addition, different reactor configurations are compared to assess the best one that is adjustable depending on the reaction mechanism. Consequently, a corrugated-wall dual-type membrane reactor is proposed as an emerging alternative for CO hydrogenation to value-added products.<br/>This research has been supported by the NRDI Fund (TKP2020 NC, Grtant No. BME-NCS) based on the charter of bloster issued by the NRDI office under the auspices of the Ministry for Innovation and Technology. SLS acknowledges the support of the US Department of Energy, Office of Basic Energy Sciences, Division of Chemical, Biological and Geological Sciences under grant DE-FG02-86ER13622.A000.<br/>