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Adsorption Performance of CO2 on Spherical Activated Carbon

Author: XieFei
Tutor: ZhanLiang
School: East China University of Science and Technology
Course: Chemical processes
Keywords: Spherical activated carbon Adsorption Adsorption selectivity Carbon dioxide
CLC: TB321
Type: Master's thesis
Year: 2011
Downloads: 187
Quote: 0
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Abstract


Experienced all kinds of disaster caused by global warming , a recent scientific community to discuss the important issues about \set of technology development . CO 2 accounted for more than 60% of the total global emissions , coal-fired power plant flue gas apparently 2 < / sub> capture of CO in the flue gas to achieve CO 2 emission reduction is the most effective way . Using the spherical activated carbon of different pore structure (PSAC) as the adsorbent material , and its simulated flue gas CO 2 (15%) of the adsorption performance and the PSAC the hole structure and CO intrinsic relationship between the amount of adsorption dynamics simulations of CO 2 adsorption behavior of the microporous Materials studio software , and in-depth study of PSAC the CO 2 < / sub> adsorption selectivity mechanism . The results show that : 1 ) 25 ° C / atmospheric pressure , the specific surface area of ??1005M 2 / g PSAC CO 2 absorption capacity to 0.91mmol / g loading 5% of melamine , the increased CO 2 absorption capacity to 1.15mmol / g, an increase of 26.3 % . 2 ) The material of CO 2 absorption capacity and BET specific surface area, total pore hole tolerance no direct relation to a linear relationship , but the microporous surface area and pore size of less than 1nm ; 3 ) in N 2 O 2 conditions exist , PSAC CO 2 adsorption selectivity of about 75 to 85% , and the presence of trace moisture and does not affect its CO 2 adsorption properties ; 4 ) Since the CO 2 than N 2 < / sub > O 2 has greater dispersion forces , so when the molecules close to the hole wall , CO 2 is more easy to be attracted ; Further, since the role of dispersion force , making CO 2 of polarized lead to molecular morphology changes from a linear molecule (O = C = O) becomes non-linear molecules , and has a certain ground polarity , be more easily pore surface atomic adsorption , PSAC CO 2 has a high adsorption selectivity .

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CLC: > Industrial Technology > General industrial technology > Materials science and engineering > Non-metallic materials > Non-organic materials
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