Affiliation:
1. Interdisciplinary Research Center for Hydrogen Technologies and Carbon Management (IRC-HTCM) Research Institute King Fahd University of Petroleum & Minerals Dhahran 31261 Saudi Arabia
2. Abdullah Khalil Consultancy Mississauga L5 M 0Y6 Ontario Canada
3. Department of Chemistry College of Science Qassim University Buraydah 52571 Saudi Arabia
Abstract
AbstractActivated carbon is an attractive adsorbent for capturing various environmental pollutants, including CO2. Herein, an optimal synthesis and impressive performance of activated carbon made from Balanites aegyptiaca (Desert date) seed shells is reported, which is an abundant agricultural waste in the Middle East and Africa. The synthesis route involved pretreating the biomass with KOH and heating it under a suitable temperature profile. An optimal KOH‐to‐biomass ratio and multi‐stage carbonization yielded activated carbon with a surface area above 3000 m2/g and an average pore size of nearly 4.1 nm. At 0 °C, this activated carbon exhibited CO2 uptake of 11.3 mmol g−1 that surpassed the uptake capacity of previously reported activated carbons. The selectivity towards CO2 was also found to be significantly higher compared to other gases. Thus, the present approach demonstrates an efficient conversion of agricultural waste to activated carbon for capturing CO2 and other environmental contaminants.