摘要
炭膜可以通过各种前驱体,如酚醛树脂的高温裂解方法制备。该过程中,裂解条件对炭膜的性质有较大影响。研究不同裂解温度及臭氧后处理对炭膜的孔隙率及气体吸附行为的影响。结果表明,当裂解温度升高(由500℃提高到800℃),炭膜的平均孔径减小,孔体积与气体吸附能力先增大后减小。在800℃下,炭膜表现出分子筛的分离性能。臭氧后处理过程使炭膜孔径增大,气体吸附效率及动态吸附选择性降低,弱化了炭膜的分离性能。
The effect of carbonization temperature and treatment with ozone on the porosity and gas separation behavior of carbons produced from phenolic resin was investigated. Results showed that with increasing carbonization temperature from 500 to 800 ℃, the average pore diameter decreased, while the pore volume and the adsorption capacity of the carbons first increased and then decreased A molecular sieve separation mechanism was also observed for the sample carbonized at 800 ℃. The pore size increased and the adsorption capacity and the kinetic adsorption selectivity for oxygen/nitrogen were decreased by the ozone treatment.
出处
《新型炭材料》
SCIE
EI
CAS
CSCD
北大核心
2013年第1期39-46,共8页
New Carbon Materials
关键词
碳分子筛
酚醛树脂炭膜
气体分离
臭氧
Carbon molecular sieve
Phenolic resin
Carbon membrane
Gas separation
Ozonation
