Microfluidics is of great importance in investigating the various physicochemical processes of carbon dioxide

the latter of which plays a fundamental role in the carbon capture

utilization

and storage (CCUS) process

as well as in achieving the goals of carbon peaking and neutralization. Here

the current status of carbon dioxide microfluidic technology

that is

the CO2-on-a-chip technology

is reviewed. CCUS technology and some basic aspects of microfluidics are briefly introduced. In particular

the advantages and impacts of microfluidic technology in advancing CO2-related studies are discussed. Examples of applications and research progress of microfluidics in screening solvents for CO2 capture

supercritical CO2-based extraction

enhanced oil recovery by CO2

biochemical conversion of CO2

and CO2 storage are specifically introduced. Finally

the success of applying microfluidics to CO2 is summarized

and the future development of this area is envisioned.