摘要
研究了高酸值(酸值(KOH)27 mg/g)米糠油制备生物柴油的工艺参数,通过单因素试验和正交试验得出,预酯化的最优工艺条件为:甲醇用量30%(占原料质量)、硫酸催化剂用量3%、反应温度70℃、反应时间2.5 h。酯交换的最优工艺条件为:甲醇用量30%、氢氧化钠催化剂用量1.5%、反应温度70℃、反应时间2.0 h。在此最优条件下测得转化率为96%。一级薄膜蒸发工艺参数为:真空度0.097 MPa,温度100℃,转子转速300 r/min,物料流量300 g/h;一级刮膜式分子蒸馏工艺参数:进口温度170℃,出口温度150℃,真空度20 Pa,物料流量295.70 g/h。
The high acid value （acid value （KOH）27 mg/g） rice bran oil was used as material to prepare biodiesel by two - step method. Through single factor experiment and orthogonal test, the optimum reaction conditions of esterification were determined as follows： methanol dosage 30% （based on the weight of stuff）, catalyst （sulfuric acid）dosage 3 %, reaction temperature 70℃, reaction time 2.5 h. The optimum reaction conditions of transesterification were as follows： methanol dosage 30%, catalyst（ sodium hydrox- ide） dosage 1.5% ,reaction temperature 70℃, reaction time 2.0 h. The conversion rate under the optimum reaction conditions was 96%. The parameters of first - level film evaporation were ： 0. 097 MPa, temperature 100℃ ,feed rate 300 g/h; and the parameters of first -level scraped film type molecular distillation were as follows： inlet temperature 170℃, outlet temperature 150℃, vacuum 20 Pa, feed rate 295.70 g/h.
出处
《中国油脂》
CAS
CSCD
北大核心
2008年第11期44-47,共4页
China Oils and Fats
关键词
米糠油
生物柴油
酯化
酯交换
riee bran oil
biodiesel
esterification
transesterifieation
