车用燃料油吸附法深度脱硫技术进展

综述了车用燃料油吸附法深度脱硫的技术及吸附机理,主要包括物理吸附脱硫、化学吸附脱硫、络合吸附脱硫和选择性吸附脱硫等。物理吸附是极性吸附,吸附剂对硫化物的选择性差,难以对燃料油进行深度脱硫;化学吸附能对燃料油进行深度脱硫,但吸附温度和吸附剂再生温度较高;络合吸附和选择性吸附脱硫技术操作条件温和、投资和操作费用低,能深度脱硫,可生产硫含量小于50μg/g的低硫车用燃料油,但目前吸附剂对含硫芳烃的选择性和容硫量还较低,不能满足工业应用的要求。

Progress in Deep Desulfurization for Vehicle Fuel Oil by Adsorption

Deep desulfurization for vehicle fuel oil by adsorption was reviewed.The desulfurization mechanism included physical adsorptive desulfurization,chemical adsorptive desulfurization,complex adsorptive desulfurization and selective adsorptive desulfurization.The effect of physical adsorption depended on polarity of sulfur and was not expected to be very selective for sulfocompounds in vehicle fuel oil and subsequent deep removal of sulfur.The chemical adsorbents were superior for sulfur removal from the low sulfur content oil,but it demanded high adsorption temperature and high adsorbent regeneration temperature.The techniques of complex adsorption desulfurization and selective adsorption desulfurization were predominant because of their low investment,low operation charge and high desulfurization efficiency.Vehicle fuel oil with sulfur content less than 50μg/g could be obtained by utilizing the techniques.But sulfur holding capacity of adsorbents and their selectivity for sulfurous aromatics could not yet satisfy the requirement in industrial application.