Preparation and H2S removal properties of ACF adsorbent supported by MOFs
MOF-199@ACF adsorbent was prepared by loading activated carbon fiber(ACF)onto MOF-199 metal-organic frame material under hydrothermal conditions,characterized by nitrogen adsorption/desorption,XRD,EDS,SEM and XPS,and evaluated for its H2S removal performance by a fixed bed reaction device.The effects of ACF loading capacity,adsorption temperature and relative humidity on the H2S removal performance of MOF-199@ACF were investigated,the possible reaction mechanism was also explored.The results showed that compared with those of MOF-199,the H2S emergence time of MOF-199@1%ACF was delayed to 405 min from 180 min,and the sulfur penetration capacity was increased from 7.2 mg/g to 14.5 mg/g.ACF with loading of 1%did not interfere with the stable crystallization structure of MOF-199,but roughened the MOF-199@1%ACF surface inducing more adsorption sites exposed and increasing the specific surface area(from 1108.6 m2/g of MOF-199 to 1978.3 m2/g).Adsorption by MOF-199@1%ACF was dominated by chemically activated adsorption,with adsorption rate increasing with temperature rise(30～70℃).Meanwhile,a moderate amount of water vapor(relative humidity 10%)could help to improve performance(penetration sulfur capacity 14.8 mg/g).
万方数据
维普
