464988 KOH Activation of Petroleum Coke for CO2 Capture: Effect of Carbonization Temperature

Tuesday, November 15, 2016
Grand Ballroom B (Hilton San Francisco Union Square)
Eunji Jang and Ki Bong Lee, Department of Chemical & Biological Engineering, Korea University, Seoul, Korea, The Republic of

The CO2 concentration in the atmosphere is over 400 ppm currently, which is about 40% higher than in the mid-1800s. Since CO2 is a major greenhouse gas, increasing CO2 concentration has caused global warming and climate change problems such as droughts and floods. To reduce CO2 emissions, many researches have been carried out for developing CO2 capture and storage (CCS) technology. Among CCS stages, CO2 capture accounts for two thirds of the total cost, indicating importance of developing efficient CO2 capture technologies. Adsorption using solid materials is one of promising CO2 capture technologies and it has advantages of low energy consumption and easy regeneration. Among various adsorbents, CO2 adsorption on activated carbons is based on high surface area and it can be obtained by activation of carbon-containing precursors. Petroleum coke, which is a byproduct of heavy oil upgrading processes, contains a high carbon content more than 80%, and therefore it is considered as a promising precursor for low-cost activated carbon. In this study, activated carbons having high surface area were synthesized through KOH activation of petroleum coke for CO2 capture. Prior to KOH activation, carbonization process was carried out and the effect of carbonization temperature on the pore development and CO2 adsorption capacity of the activated carbons was investigated.

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