摘要
以泡沫镍金属为基体,制备结构化5A分子筛吸附材料,探讨了焙烧温度、硅/铝溶胶固含量比、5A分子筛原粉固含量对结构化5A分子筛性能的影响。采用SEM、TG、XRD、BET、超声振荡等分析方法对样品进行了微观组织结构和结合强度的分析和表征;采用H2和N2的混合气体为吸附质进行了N2在结构化材料中的吸附穿透曲线测定。结果表明,具有较高强度的泡沫镍骨架包埋于分子筛层中,且结构化吸附材料中微孔和介孔并存。在焙烧温度为550~650℃时,5A分子筛可较好地保持原有晶型结构;硅/铝溶胶固含量比为1∶1时,结构化5A分子筛微孔孔体积最大;分子筛原粉固含量为79%时,结构化5A分子筛质量损失率仅为0.75%。结构化5A分子筛具有较高的吸附容量,可达544 m^2·g^-1。与球状吸附剂相比,结构化吸附材料具有更小的传质区与传质阻力。
Structured 5A molecular sieve adsorbent was prepared with foam nickel as matrix.The effects of calcination temperature,solid content ratio of silicon/aluminum sol and raw powder content of 5A molecular sieve on the properties of structured 5A molecular sieves were discussed.The microstructure and bonding strength of the samples were analyzed and characterized by SEM,TG,XRD,BET,ultrasonic vibration.The adsorption breakthrough curves of N2 in the structured material were measured by using the mixed gas of H2 and N2 as the adsorbate.The results show that the foam nickel skeleton with high strength was embedded in the molecular sieve layer,and the micropores and mesopores coexisted in the structured adsorbent material.5A molecular sieve could maintain its original crystal structure at the calcination temperature up to 550~650℃.The structured 5A molecular sieve had the largest microporous volume when the solid content ratio of silicon/aluminum sol was 1∶1.The mass loss rate of structured 5A molecular sieve was less than 0.75% when the raw powder content of molecular sieve was 79%.The structured 5A molecular sieve had appreciable adsorption capacity up to 544 m^2·g^-1.Compared to the spherical adsorbent,the structured adsorption material had smaller mass transfer zone and mass transfer resistance.
作者
刘京雷
王浩
张胜中
范得权
张英
徐宏
LIU Jinglei;WANG Hao;ZHANG Shengzhong;FAN Dequan;ZHANG Ying;XU Hong(Center of Efficient Green Process Equipment and Energy Conservation,Ministry of Education,East China University of Science and Technology,Shanghai 200237,China;Sinopec Dalian Research Institute of Petroleum and Petrochemical,Dalian 116050,China)
出处
《环境工程学报》
CAS
CSCD
北大核心
2020年第1期165-172,共8页
Chinese Journal of Environmental Engineering
基金
中石化科技开发项目(117018-4)
关键词
5A分子筛
负载
结构化
吸附材料
5A molecular sieve
loading
structuration
adsorption material
