Evaluation of Activated Carbon Adsorbents for CO2 Capture in Gasification

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• 作者：Trevor C. Drage ; James M. Blackman ; Cova Pevida ; Colin E. Snape
• 刊名：Energy & Fuels
• 出版年：2009
• 出版时间：May 21, 2009
• 年：2009
• 卷：23
• 期：5
• 页码：2790-2796
• 全文大小：171K
• 年卷期：v.23,no.5(May 21, 2009)
• ISSN：1520-5029

文摘

Activated carbon adsorbents have been evaluated at high pressure, up to 4 MPa, to determine their applicability for the removal of CO₂ from syngas generated from gasification. The CO₂ adsorption capacity and diffusion mechanism were demonstrated to be dependent upon the adsorbent outgas conditions. Activated carbons have been demonstrated to have higher adsorption capacities than existing absorption systems up to 12 mmol g⁻¹ at 4 MPa, under strong outgas conditions. Adsorption capacities on a weight basis have been demonstrated to be correlated with the surface area and micropore volume of the materials. However, performance on a volumetric basis is less well-defined and is controlled by the form and bulk density of the adsorbent. Complete cyclic regeneration of the adsorbents has been demonstrated by pressure swing regeneration cycles.