Carbon molecular sieves from palm shell: Effect of the benzene deposition times on gas separation properties

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• 作者：W.M.A. Wan Daud ; M.A. Ahmad ; M.K. Aroua
• 关键词：Carbon molecular sieves ; Palm shell ; Activation ; Benzene deposition
• 刊名：Separation and Purification Technology
• 出版年：2007
• 期刊代码：78_13835866
• 类别：ce
• 出版时间：15 October 2007
• 卷：57
• 期：2
• 页码：289-293
• 文件大小：446 K

摘要

In the present work, an effort has been made to develop suitable process conditions for synthesis of carbon molecular sieve (CMS) from a locally available palm shell of Tenera type. The process involves three stages; carbonization, physical activation with steam, and carbon deposition by using benzene cracking technique. The highest micropore volume of activated carbon was obtained at 53.2%burn-off, which is then used as a precursor for CMS production. In order to narrow down the pore mouth size to a required size, benzene was cracked at 800 °C for 15–60 min. The characterization of the samples was assessed by physical adsorption of N₂ at 77 K. The adsorption kinetic of CO₂, CH₄, O₂ and N₂ were measured at room temperature in order to determine the sample behavior as CMS.