基于超临界乙醇的竹子与聚乙烯共液化研究

EXPERIMENTAL STUDY ON CO-LIQUEFACTION OF BAMBOO AND PE IN SUPERCRITICAL ETHANOL

结合生物质的可再生特性和塑料的可作为供氢体系的优点,将超临界流体(SCF)技术用于生物质热解,以得到环境友好型的生物燃油。实验研究了竹子和聚乙烯在超临界乙醇中进行共热解的工艺参数和技术条件。并应用气质联用仪(GC-MS)对生物油产物进行分析。结果表明,竹子和塑料在恰当的工艺条件下,可以获得良好的液化效果,共液化率高于竹子的单独液化率。反应温度在250～290℃间,在不加入催化剂的条件下,竹子与聚乙烯的共液化率为40.6%;在加入碳酸钾催化剂下,共液化率达62.6%。通过GC-MS分析,热解产物中主要含C_(12)以下的醇类、酯类、酮类和醚类,适合作为点燃式内燃机的燃料。

Plastic can be used as hydrogen-donor solvent in thermochemical conversion of biomass into biofuel. The super- critical fluid （SCF） technology for biomass pyrolysis was used for producing environmentally friendly biofuel. Experimen- tal study on co-liquefaction process and reaction mechanism for bamboo and polyethylene in supercritical ethanol was done. The bio-oil products were analyzed through GC-MS. The results show that it is good at co-liquefaction of bamboo and plastic. The co-liquefaction rate is higher than bamboo only. At 250 - 290℃, the highest co-liquefaction rate of bamboo and polyethylene is 40.6% without catalyst. And it is 62.6% with catalyst of potassium carbonate. The biofuel from bamboo and polyethylene contains ： alcohols, esters, ketones and ethers when analyzed by GC-MS. It＇ s suitable for the spark ignition engine fuels.