基于响应面法优化生物基富烃燃料气相酯化工艺及燃烧性能的研究

摘要

针对生物基富烃燃料存在酸值较高、难以直接应用于发动机等缺陷，作者采用气相催化酯化方法提高燃料的品质，通过Box-Behnken响应面法优化生物基富烃燃料酯化工艺参数，并对酯化后生物基富烃燃料进行了检验和台架评测。结果表明：生物基富烃燃料催化酯化的最佳工艺为催化剂用量0.23%、醇油物质的量比10.34∶1、反应时间117min。通过分析表征发现酯化后的生物基富烃燃料性能指标有明显提升，理化性能接近于0#柴油，但燃料本身存在闪点较低的缺点，若推广应用需要进一步精馏处理；台架试验发现生物基富烃燃料的排放特性和烟度优于0#柴油，并且在同样转速情况下输出扭矩略大。因此，通过研究可以为富烃燃料的应用提供一定的理论基础。%Rich hydrocarbon has the defect of high acid value,which cannot be applied directly to the engine.On the basis of previous experiments,the esterification method was adopted to improve the quality,and the Box-Behnken response surface method was used to optimize the esterification process of the rich hydrocarbon fuel and the esterification of rich hydrocarbon fuel was tested and inspected by bench. The results show that the optimum catalyst dosage for the catalytic esterification of rich hydrocarbon fuels was 0.23%,the molar ratio of methanol to oil was 10.34∶1,and the reaction time was 117.00min. Char-acterization analysis found that after esterification of rich hydrocarbon fuel performance has improved sig-nificantly,the physical and chemical indicators close to 0 # diesel,but the temperature of flash point is low,needing for further distillation.Bench test found that the emission characteristics of rich hydrocarbon fuel and smoke is better than 0 # diesel.In the case of the same speed,the torque of the fuel rich fuel is slightly larger.Therefore,this research can provide a theoretical basis for the practical application of bio-logical rich hydrocarbon oil.