期刊
APPLIED SURFACE SCIENCE
卷 324, 期 -, 页码 286-292出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2014.10.135
关键词
CO2 capture; Mesoporous silica; Pore size effect
类别
资金
- National Natural Science Foundation of China [21203167, 21106136]
- Science and Technology Department of Zhejiang Province [2013C31049]
- State Key Laboratory of Catalysis [N-12-07]
- Wyoming Clean Coal Program in the USA
The objective of current research is to investigate the effect of pore size of mesoporous silica supports on the CO2 capture performance of solid amine sorbents. Two ordered mesoporous silicas (OMS) with different pore sizes (5.6 nm and 7.6 nm) were synthesized as tetraethylenepentamine (TEPA) supports. A serious of techniques, such as physical adsorption, infrared spectroscopy and thermal gravimetric analysis were used to characterize the solid amine sorbents. The CO2 capture performances of the sorbents were evaluated using breakthrough method with a fixed-bed reactor equipped with an online mass spectrometer. The experimental results indicate that the pore size has significant influence on CO(2)capture performance. Larger pore size could decrease the mass transfer resistance and increase the interaction between CO2 and TEPA. Therefore, OMS-7.6 is better than OMS-5.6 as amine support. The highest CO2 sorption capacities achieved with OMS-7.6 with 50 wt% TEPA loading (OMS-7.6-50) in the absence and presence of moisture are 3.45 mmol/g and 4.28 mmol/g, respectively, under the conditions of 10.0% CO2/N-2 mixture at 75 degrees C. Cyclic CO2 adsorption-desorption experiments indicate that the solid amine sorbents are fairly stable and regenerable. (C) 2014 Elsevier B.V. All rights reserved.
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