以蔗糖聚酯和海藻酸钠为主要原料制备一种复合脂肪替代品,在单因素实验的基础上,通过正交实验确定了其最优生产工艺,并对复合脂肪替代品的理化性质进行了测定。结果表明:最优生产工艺为蔗糖聚酯与海藻酸钠质量比2∶1、p H 4.5、搅拌温...以蔗糖聚酯和海藻酸钠为主要原料制备一种复合脂肪替代品,在单因素实验的基础上,通过正交实验确定了其最优生产工艺,并对复合脂肪替代品的理化性质进行了测定。结果表明:最优生产工艺为蔗糖聚酯与海藻酸钠质量比2∶1、p H 4.5、搅拌温度45℃,在此条件下复合脂肪替代品的得率为6.04%。产品的外观类似油脂,在持水性、持油性、乳化性、乳化稳定性、流变性等方面均表现出较理想的功能特性。展开更多
The transesterification of Jatropha oil and methyl acetate to biodiesel catalyzed by a compound lipase was investigated.A 5-level-3-factor central composite rotatable design of the response surface method was used to ...The transesterification of Jatropha oil and methyl acetate to biodiesel catalyzed by a compound lipase was investigated.A 5-level-3-factor central composite rotatable design of the response surface method was used to evaluate the effects of compound enzyme amount,compound enzyme formulation and substrate composition on the yield of biodiesel.The optimum conditions were as follows: enzyme amount 0.27 g,compound enzyme formulation 0.15(mass) N234 and substrate composition of methyl acetate to Jatropha oil 10.10.Under optimum conditions,the actual experimental yield was 74.34%,which compared well with the predicted value of 72.55%.The model based on Ping Pong Bi Bi mechanism with substrate competitive inhibition was proposed to describe the reaction kinetics of the transesterification.展开更多
文摘以蔗糖聚酯和海藻酸钠为主要原料制备一种复合脂肪替代品,在单因素实验的基础上,通过正交实验确定了其最优生产工艺,并对复合脂肪替代品的理化性质进行了测定。结果表明:最优生产工艺为蔗糖聚酯与海藻酸钠质量比2∶1、p H 4.5、搅拌温度45℃,在此条件下复合脂肪替代品的得率为6.04%。产品的外观类似油脂,在持水性、持油性、乳化性、乳化稳定性、流变性等方面均表现出较理想的功能特性。
文摘The transesterification of Jatropha oil and methyl acetate to biodiesel catalyzed by a compound lipase was investigated.A 5-level-3-factor central composite rotatable design of the response surface method was used to evaluate the effects of compound enzyme amount,compound enzyme formulation and substrate composition on the yield of biodiesel.The optimum conditions were as follows: enzyme amount 0.27 g,compound enzyme formulation 0.15(mass) N234 and substrate composition of methyl acetate to Jatropha oil 10.10.Under optimum conditions,the actual experimental yield was 74.34%,which compared well with the predicted value of 72.55%.The model based on Ping Pong Bi Bi mechanism with substrate competitive inhibition was proposed to describe the reaction kinetics of the transesterification.