In-situ activated ultramicroporous carbon materials derived from waste biomass for CO2 capture and benzene adsorption
In-situ activated ultramicroporous carbon materials derived from waste biomass for CO2 capture and benzene adsorption
复制标题
来自废弃生物质的原位活化超微孔碳材料用于二氧化碳捕获和苯吸附
DOI：
10.1016/j.biombioe.2022.106353
复制
发表时间：
2022-03
影响因子：
6
通讯作者：
Liqing Li
中科院分区：
文献类型：
--
作者：
Xiancheng Ma;Yi Wu;Muaoer Fang;Baogen Liu;Ruofei Chen;Rui Shi;Qingding Wu;Zheng Zeng;Liqing Li
随着经济的发展和环保意识的提高，燃煤燃气中的二氧化碳、苯等污染物需要控制。本文提出了一种基于烟杆的原位活性多孔炭的制备方法。烟梗中的C-OH基和C-OH基可以通过水热过程与锌离子配位形成水合锌。锌水合物中锌的存在提供了额外的144%的超微孔体积，有助于在0℃和25℃下分别在1bar下分别获得209g和146g−的二氧化碳吸收能力。在1bar和25℃下，MPC对CO2/N2的选择性为16.4-26.6%。基于实验数据和分子模拟，我们发现随着孔宽的增加，MPC对CO2的吸附和分离能力降低。氧和氮原子可以增加碳骨架的电负性，提供更多的CO2活性中心，从而提高CO2的捕获率和选择性。此外，在浓度为10ppm和50ppm时，MPC-1对苯的吸附容量分别为97g−1和202g−1。分子模拟表明，即使在PPM以下的环境/室内环境中，MPC也能在低浓度下促进苯的吸附。
With the development of economy and the improvement of environmental protection awareness, more pollutants such as CO2and benzene in coal-fired fuel gas need be controlled. Here, a novel preparation strategy of in-situ activated porous carbons based on tobacco stem was proposed. The C–OOH and C–OH groups in tobacco stem could coordinate with zinc ions through hydrothermal process to form Zn-hydrochars. The presence of Zn in Zn-hydrochars (MPC-1) provides an additional 144% ultramicropore volume, contributing to superior CO2uptake capacity of 209 and 146 mg g−1under 1 bar at 0 °C and 25 °C respectively. The selectivity of CO2/N2on MPCs is 16.4–26.6 at 1 bar and 25 °C. Based on experimental data and molecular simulation, we found that CO2uptake and separation decreasing with the pore widths increasing. The oxygen and nitrogen atoms can increase electronegativity of carbon framework and provide more CO2active sites, thereby enhancing CO2capture and selectivity. Besides, the MPC-1 exhibits superior benzene adsorption capacities of 97 mg g−1and 202 mg g−1at concentration of 10 ppm and 50 ppm, respectively. The molecular simulation shows that MPCs facilitate the benzene adsorption at a low concentration, even in environments/indoor environments with the sub-ppm range.
登录
查看更多内容
影响因子：
32.5
作者：
Yonggang Jin;S. Hawkins;C. Huynh;S. Su
通讯作者：
Yonggang Jin;S. Hawkins;C. Huynh;S. Su
影响因子：
32.5
作者：
Gadipelli Srinivas;V. Krungleviciute;Zheng-Xiao Guoa;T. Yildirim
通讯作者：
Gadipelli Srinivas;V. Krungleviciute;Zheng-Xiao Guoa;T. Yildirim
影响因子：
64.8
作者：
Li, H;Eddaoudi, M;Yaghi, OM
通讯作者：
Yaghi, OM
多孔碳中 O 掺杂和 N 掺杂对 CO2 捕获的相对影响的实验和理论论证
影响因子：
6.7
作者：
Ma, Xiancheng;Li, Liqing;Li, Hailong
通讯作者：
Li, Hailong
影响因子：
10.9
作者：
STOHR, B;BOEHM, HP;SCHLOGL, R
通讯作者：
SCHLOGL, R