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Alternative source of energy such as biomass gasification can be used to generate power and electricity. Producer gas produced from biomass gasification consists of carbon monoxide (CO), hydrogen (H2), methane (CH4), carbon dioxide (CO2) and nitrogen (N2). It has low calorific value (LCV) around 4-6 MJ/Nm3 because of CO2 content is about 10-20 % by volume. Calcium oxide, CaO can be used to absorb carbon dioxide (CO2) of the producer gas to increase its low calorific value. In this paper, an investigation of the 1000-micron CaO ability to absorb CO2 has been made and studied. The absorption-desorption process of CaO was studied with the thermogravimetric analyzer (TGA) over 1, 4 and a muticycle. Three different temperature (500, 600 and 700°C) were set a variable. The reaction rate of CaO was obtained. Results show that for number 1 cycle the CO2 absorption reaction rate was fast at first stage and then followed with slower reaction rate. About 0.337 and 0.065 mg/min CO2 reaction rate were obtained in rapid and slow absorption regime respectively. It is also observed that the CO2 absorption reaction rates decreases when number of cycle’s desorption-absorption process was increased.

Investigate the Ability of 1000 Micron CaO to Absorb CO2 Gas through Absorption - Desorption Process for Biomass Producer Gas in Malaysia