Enhanced Ethylene Absorption over the Positively Charged Solid Surface

摘要

The transformation of homogeneous catalysts on solid supports has been regarded as one of the most efficient technologies for recovering ethylene from dry gas. Researchers focus on catalyst efficiency under many factors except the surface charge properties. In this work,absorbing liquids, AgNO3 and AgBF4 aqueous solution, are dispersed on charged solid surfaces forming a supported liquid phase absorbent (SLPA) for ethylene recovery. Three kinds of surfaces:strong acid, strong basic and strong amphoteric are created to demonstrate how the charge properties of the micro-scale interfaces between liquid and solid phases affect the ethylene absorptivity. The porous media was characterized by nitrogen sorption measurements or mercury porosimetry, zeta potential analyzer and the X-ray powder diffraction. It is found that when dispersing AgNO3 and AgBF4 aqueous solutions on a positively charged surface, the ethylene absorptivity is enhanced by 51.6% and 82.6%, respectively. And the acting mechanism of a positively charged solid surface in ethylene absorption is also discussed.