甘油三酯裂解制备可再生液体燃料油研究

以碳酸钠为碱性催化剂,采用TG、DTG、DSC分析确定大豆油为原料的裂解特性。通过对四种典型裂解产物的跟踪测定,确证碱性催化剂能够改变大豆油裂解时的反应历程。分析结果表明,裂解温度在400℃~500℃,热解方式为快速热解。采用自行研制的小型滴流床反应器催化裂解大豆油。比较了不同催化剂的催化裂解性能,发现碱性催化剂具有较高的脱羧能力。在较佳催化裂解工艺条件下,所得燃料油酸值较低(30 mg KOH/g)。通过FT-IR、GC-MS以及燃料性能的分析,其组分和成分与0号柴油相似,热值43 M J/kg,黏度2.6 mm2/s,密度0.84 g/cm3。

Production of renewable liquid fuel from triglycerides

Triglyceride is a kind of renewable sources and widely exists in animals and plants. The cracking properties of triglyceride were analyzed through TG, DTG and DSC using soybean oil as material. The catalysis mechanism was changed with base catalyst. The results show that the fuel properties of cracking product are improved because the base catalyst can promote decarboxylation reaction in cracking process. The temperature of cracking of soybean oil is about 400℃～500℃. The suitable cracking technology is flash pyrolysis in a trickle bed reactor. Several kinds of catalysts such as Al_2O_3, MCM-41 and Na_2CO_3 were compared. Under the optimum conditions, the obtained cracking oil shows low acid value (30mg KOH/g). The cracking oil characterized by FT-IR and GC-MS shows the formation of olefins, paraffins. The heat value of pyrolytic oil is 43MJ/kg and its dynamic viscosity and density is 2.6mm~2/s and 0.84g/cm3, respectively.