Hydrogenation of carbon dioxide (CO₂) to fuels in microreactors: a review of set-ups and value-added chemicals production

Abstract

A review of CO2 hydrogenation to fuels and value-added chemicals in microreactors.

CO2 to dimethyl ether (DME): structural and functional insights of hybrid catalysts

“…191 Recent deployments of laboratory-scale microreactors have attracted much attention due to their ability to avoid mass and heat transfer limitations (due to high surface/volume ratio), reduce pressure drop, reduce residence time to control secondary reactions and improve CO 2 conversion and DME selectivity. 192 It is also possible to attach heat exchange units and hydrophilic membranes in the microreactors. 193,194 Koybasi et al modeled a membrane microchannel reactor with rectangular permeate and catalyst-coated (wash-coated Cu-ZnO/Al 2 O 3 + H-ZSM-5) reaction channels separated by a sodalite membrane layer that allows H 2 O and H 2 transport.…”

Optimizing CO2 methanation: effect of surface basicity and active phase reducibility on Ni-based catalysts

“…3 Alternatively, side reactions (eqn (5) to (9)) can also occur, resulting in solid carbon deposits that may accumulate on the catalyst surface, ultimately triggering catalyst deactivation. CO 2(g) + 4H 2(g) = CH 4(g) + 2H 2 O (g) (1) CO 2(g) + H 2(g) = CO (g) + H 2 O (g) (2) CO 2(g) + CH 4(g) = 2CO (g) + 2H 2(g) ( 3)…”

“…1 Furthermore, it offers a transition from the carbon capture and storage (CCS) strategy to a more pragmatic and favorable carbon capture and utilization (CCU) approach. 2 Depending on the specific operational conditions, this reaction may be accompanied by concurrent side reactions, as illustrated in eqn (2) to (4). These side reactions can potentially yield undesired byproducts like carbon monoxide (CO) or consume methane, consequently leading to diminished product yield and selectivity.…”

Low-temperature conversion of CaO-captured CO2 to CH4 over a greenly prepared Ni/CaO/Al2O3 composite under static pressure conditions

“…Developing various methods and materials to achieve carbon neutrality has attracted wide attention. [1][2][3] CO 2 capture and utilization (CCU) is an effective strategy for reducing CO 2 emissions. [4][5][6] The current CCU technology mainly includes several steps, such as CO 2 capture, adsorbent regeneration, and conversion of the captured CO 2 .…”