采用多相放电反应技术加氢精制生物油的试验研究

Experimental Study on Hydrogenation of Bio-oil Through Multiphase Discharge Reaction Technology

针对目前生物油加氢技术中存在的催化剂易结焦、工艺过程不能连续等问题,采用多相放电反应对生物油进行加氢精制。构建了生物油/固体催化剂/H_2的多相放电体系,研究了催化剂类型、工作电压、气体流量、反应时间等条件对精制生物油的加氢脱氧效果的影响。研究结果表明:随着工作电压和气体流量的增大,多相放电催化加氢精制生物油的脱氧率(R)呈现出先增加后减少的趋势;随着反应时间的延长,呈现出先增加后稳定的趋势。在工作电压为22 kV,气体流量为60 mL/min,反应时间为120 min的工艺条件下,脱氧率最高可达41%。与生物原油相比,多相放电催化加氢精制的生物油中醇类、酚类、酮类等物质的含量相对较低,而碳氢类物质显著增多。

In order to solve the problems of easy coking of catalysts and uncontinuous process in bio-oil hydrogenation technology,the multiphase discharge reaction technology was adopted to hydrofine the bio-oil.The bio-oil/solid catalyst/H 2 multiphase discharge system was constructed.The influence of catalyst effect on the hydrogenation of bio-oil was studied.Then the impacts of the working voltage,gas flow rate and reaction time on the effect of multiphase discharge hydrofining bio-oil in the device were researched.The results showed that with the increase of working voltage and gas flow rate,deoxidization rate(R)of multiphase discharge of hydrofining bio-oil were presented to increase firstly then decrease.With the increase of reaction time,R increased firstly then stabilized at the end.Under the conditions of working voltage 22 kV,gas flow rate 60 mL/min and reaction time 120 min,the deoxidation rate could reach 41%.Compared with the raw bio-oil,the contents of alcohols,phenols,ketones,acids of multiphase discharge hydrofining bio-oil were relatively low,and hydrocarbons increased significantly.The feasibility of using multiphase discharge technique was confirmed.