Analysis of carbon dioxide chemical looping absorption system from flue gas emissions of internal combustion engines

Abstract Transportation sector remains to be one of the major contributors to the consistent increase of global carbon dioxide emissions. The study demonstrates a novel amine based solvent Carbon capture Chemical Looping Absorption (CCLA) system tested to flue gas emissions of petrol and diesel internal combustion engines (ICE). Chemical absorption offers a promising solution for efficient carbon dioxide capture. Soda lime chemical compound was utilized in the study which is composed mainly of calcium hydroxide, water, sodium hydroxide and small amount of potassium hydroxide. The said compound is housed in a chamber designed to have unobstructed flow of flue gas emissions. Data gathering on the effectivity of carbon dioxide absorption were undertaken at different engine speeds using a five-gas analyzer. Results obtained from gasoline engine showed that the carbon dioxide mass percentage decreased to 7.12% at low engine speed, which is more than half of its original value of 15.12%. For the diesel engine, results showed no significant changes but demonstrates absorption of carbon soot and other particulate matters as evident to the color change of the compound used. The study demonstrates promising potential on carbon dioxide capture and was able to provide substantial information on the effectiveness of the CCLA for ICE. The findings are of great contribution in the development of alternative strategies for reducing carbon dioxide emissions from the transport sector.