Wu Feng-Chin, Tseng Ru-Ling
Department of Chemical Engineering, National United University, Miao-Li 360, Taiwan.
J Hazard Mater. 2008 Jul 15;155(3):449-58. doi: 10.1016/j.jhazmat.2007.11.086. Epub 2007 Nov 29.
Mass balance and the Langmuir equation were used to deduct the countercurrent multi-stage adsorption process. The relationships between the Langmuir parameter (K(L)y(i)) and the required amounts of adsorbent in countercurrent two-, three- and infinite-stage processes were obtained to find the optimum number of stages as well as the reduction in the adsorbent consumption of the countercurrent multi-stage process of an adsorption system. Pistachio shell activated carbons with BET surface areas of 1013, 1398, and 1919m(2)/g were obtained by KOH activation with CO(2) gasification at gasification times of 0, 10, and 30min. The isotherm adsorption of four adsorbates were investigated and analyzed with the Langmuir equation. The activated carbons studied in this work show compared with other published literatures, the K(L)y(i) and q(mon) values in this work showed excellent adsorption performance. The amount of activated carbon for a countercurrent two- and single stage adsorption operation was calculated, a saving of 66-87% adsorbent was obtained. A simple countercurrent two-stage adsorption system was designed for use in engineering applications.
利用质量平衡和朗缪尔方程推导逆流多级吸附过程。得到了朗缪尔参数（K(L)y(i)）与逆流二级、三级和无限级过程中吸附剂需求量之间的关系，以确定最佳级数以及吸附系统逆流多级过程中吸附剂消耗的减少量。通过在0、10和30分钟的气化时间下用KOH活化并进行CO(2)气化，获得了BET表面积分别为1013、1398和1919m(2)/g的开心果壳活性炭。用朗缪尔方程对四种吸附质的等温吸附进行了研究和分析。与其他已发表文献相比，本研究中的活性炭显示出，本工作中的K(L)y(i)和q(mon)值具有优异的吸附性能。计算了逆流二级和单级吸附操作的活性炭用量，吸附剂节省了66 - 87%。设计了一种简单的逆流二级吸附系统用于工程应用。
