Study of <scp> CO ₂ </scp> mitigation in a <scp>CI</scp> engine exhaust using a potential adsorbent: An experimental investigation

Abstract The atmospheric carbon dioxide (CO 2 ) concentration has reached its elevated peak, a severe threat to the world. Post‐combustion CO 2 capture is the most crucial method to mitigate CO 2 emissions. Recently, the biomass‐based adsorbent used in the adsorption technique has grabbed the great attention of the scientific communities. The adsorbent‐packed post‐combustion carbon capture unit can easily integrate with the existing working system without affecting efficiency. In the present research study, an experimental investigation has been conducted on biomass‐derived adsorbent to explore the feasibility of CO 2 adsorption performance from the exhaust of a compression ignition (CI) engine. As a first step, rice husk is chosen as a suitable raw material to produce activated carbon using simultaneous carbonization and activation. As a second step, the prepared activated carbon material is subjected to distinctive characterization and analytical approaches to determine its surface aspects and physical and chemical characteristics. As a third step, the sample is loaded in‐built of the capture unit and connected to the system. The main findings of the experimental test results are compared using the adsorbent capture efficacy with two distinct test fuels employed in the CI engine. The experimental outcomes show that the maximum CO 2 adsorption is achieved by about 24% and 28% for D2 quality diesel and Jatropha methyl ester biodiesel fuel operations, respectively, at normal operating conditions.