Mercury (II) ion adsorption performance of Cl-loaded carbonaceous material prepared by chlorination of pyrolyzed rice husk char
Mercury (II) ion adsorption performance of Cl-loaded carbonaceous material prepared by chlorination of pyrolyzed rice husk char
复制标题
DOI：
10.1016/j.jclepro.2021.127176
复制
发表时间：
2021-04
影响因子：
11.1
通讯作者：
Y. Mochizuki;Javzandolgor Bud;Jiaqiang Liu;Miki Takahashi;N. Tsubouchi
中科院分区：
文献类型：
--
作者：
Y. Mochizuki;Javzandolgor Bud;Jiaqiang Liu;Miki Takahashi;N. Tsubouchi
本研究的目的是详细阐明的Cl-负载后得到的稻壳焦（RC）的炭吸附汞的性能。首先，研究了所制备的载氯炭的氯含量/形貌/孔隙率。随后，对负载Cl的活性炭的汞吸附性能进行了测试。通过比较由RC和脱矿RC（DRC）制备的Cl负载炭的吸附性能，研究了Cl对Hg吸附的影响。RC和DRC的Cl含量在600 °C时达到最大值，1000 °C时下降。随着氯化温度的升高，RC氯化残渣的孔特性增大。RC氯化残渣对汞的吸附性能随氯化温度的升高而增强。RC氯化残渣在1000 °C，10 min时对Hg的最大吸附容量达到620 mg/g; DRC在1000 °C，10 min时对Hg的吸附容量大于DRC在600 °C氯化时对Hg的吸附容量。吸附动力学和吸附等温线分别符合准一级动力学方程和Langmuir方程。在1000 °C，10 min条件下，对DRC和RC氯化残渣的孔隙率和汞吸附量进行了比较，结果表明，RC氯化过程中吸附在活性炭上的Cl-可能也参与了汞的吸附。
The objective of this study was to elucidate in detail the Hg adsorption performance of Cl-loaded carbons obtained after chlorination of rice husk char (RC). Firstly, chlorine content/morphology/porosity of Cl-loaded carbons prepared were investigated. Subsequently, Hg adsorption performance of Cl-loaded carbon was tested. The effect of Cl on Hg adsorption was then investigated by comparing the adsorption performance of Cl-loaded carbons prepared from RC and demineralized RC (DRC). Cl content of RC and DRC reached a maximum value at 600 °C, and then decreased by 1000 °C. The pore properties of RC chlorinated residue increased with increasing chlorination temperature. The Hg adsorption performance of the RC chlorinated residues increased with increasing chlorination temperature. The maximum Hg adsorption capacity of RC chlorinated residue obtained at 1000 °C, 10min reached 620 mg/g; the capacity of chlorinated residue treated with DRC at 1000 °C, 10min was larger than that of DRC chlorinated at 600 °C, which is largest Cl content. The adsorption kinetics and isotherm could be expressed by pseudo-first-order and Langmuir equations, respectively. The comparison of the porosity and Hg adsorption of DRC and RC chlorinated residue obtained at 1000 °C, 10min indicated that Cl-adsorbed on the carbon in RC during chlorination may also be involved in Hg adsorption.