期刊
CHEMICAL ENGINEERING JOURNAL
卷 428, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2021.130985
关键词
Porous carbon; Biomass; Porous structure; Light hydrocarbons adsorption and separation
资金
- Natural Science Foundation of Hunan Province, China [2017JJ3517]
- Scientific Research Foundation for Talented Scholars of CSUFT University [2019YJ019]
- National Nature Science Foundation of China [21878338]
A strategy for preparing hierarchical porous carbons derived from biomass and urea with tunable pore size distribution was proposed for the adsorption and separation of light hydrocarbons from mixed gas. The increase in urea content led to narrower pore size distributions but decreased surface area and total pore volume of the porous carbons. Different combinations of porous carbons exhibited varying capacities and selectivities towards different light hydrocarbons.
The light hydrocarbons adsorption and separation from mixed gas is very important to the petroleum industry. Herein, a simple and effective strategy for preparing hierarchical porous carbons (HPCs) derived from biomass and urea with tunable pore size distribution is proposed. With the increase of urea content, the pore size distributions of HPCs become narrow, and the surface area (from 3588 to 2626 m(2) g(-1)) and total pore volume (2.605 to 1.688 mL g(-1)) decrease. Tested at an adsorption temperature of 25 degrees C and a pressure of 1 bar, the resulting HPC800-0.5 has excellent C3H8 (12.18 mmol g(-1)) and C2H6 (6.88 mmol g(-1)) uptake capacity, while HPC800-1.5 exhibits the highest IAST-predicted C3H8/CH4 (91) and C2H6/CH4 (15) selectivity. Molecular simulations suggest that the porous structure (or more specifically micropores) has a more prominent effect on C2H6 and C3H8 capture at 1 bar than functional groups. The selectivity of C3H8/CH4 and C2H6/CH4 mainly depends on the narrow micropores (C3H8/CH4, pore size <1.2 nm and C2H6/CH4, pore size <1 nm) of carbon-based materials. This study provides insights for the further design and development of adsorbents for light hydrocarbons adsorption and separation from natural gas.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据