This paper represents the prospect of mustard oil as a renewable and alternative fuel. To cope up with present load-shedding situation and to reduce the dependency on imported fuel, Bangladesh government is encour- ag...This paper represents the prospect of mustard oil as a renewable and alternative fuel. To cope up with present load-shedding situation and to reduce the dependency on imported fuel, Bangladesh government is encour- aging the use of renewable energy sources. Since diesel engines have versatile uses including small irrigation pumping systems, and standby small electricity generators, use of diesel fuel is much higher than any other gasoline fuels. In Bangladesh mustard oil has been in use as edible oil throughout the country. Mustard is a widely growing plant in Bangladesh and every year the production of mustard seed exceeds the demand. So the endeavor was to use the surplus mustard oil as an alternative to diesel fuel. Fuel properties are determined in the fuel testing laboratory with standard procedure. An experimental set-up is then made to study the performance of a small diesel engine in the heat engine laboratory using different blends of bio-diesel converted from mustard oil. It is found that bio-diesel has slightly different properties than diesel fuel. It is also observed that with bio-diesel, the engine is capable of running without difficulty but with a deviation from its optimum performance. Initially different blends of bio-diesel (i.e. B20, B30, B50 etc,) have been used to avoid complicated modification of the engine or the fuel supply system. Finally, a comparison of engine performance for different blends of bio-diesel has been carried out to determine the optimum blend for different operating conditions.展开更多
Biodiesel is considering a clean-burning fuel produced from non edible vegetable oils, or animal fats. It is produced by transesterification of oils with short-chain alcohols or by the esterification of fatty acids. I...Biodiesel is considering a clean-burning fuel produced from non edible vegetable oils, or animal fats. It is produced by transesterification of oils with short-chain alcohols or by the esterification of fatty acids. In the present context, biodiesel is an alternative eco friendly diesel fuel. Keeping this in view, an attempt has been made through the experiment of Thumba blended biodiesel on CI engine in laboratory and analyzes its properties and characteristic compare with other biodiesel oils. Five blends B05, B10, B15, B20 and B25 of thumba seed oil biodiesel were papered and it performance was evaluated with 7HP four-stroke diesel engine. The performance of thumba seed oil biodiesel were compared with biodiesel prepared by mustard, castor and Jatropha seed oil with same blends.展开更多
利用自制的酶柱反应器,通过改变反应液流量、溶剂的种类、反应时间以及水含量等参数,考察了大豆油和甲醇在固定化脂肪酶(Cand ida sp.99-125)催化下进行酯交换反应制备生物柴油的工艺条件,并用气相色谱对产物进行了分析。实验结果表明,...利用自制的酶柱反应器,通过改变反应液流量、溶剂的种类、反应时间以及水含量等参数,考察了大豆油和甲醇在固定化脂肪酶(Cand ida sp.99-125)催化下进行酯交换反应制备生物柴油的工艺条件,并用气相色谱对产物进行了分析。实验结果表明,反应液流量和水含量对转化率影响比较大,转化率随反应液流量的增加出现先增后减的趋势,采用正己烷为溶剂要优于其它溶剂。当以固定化的脂肪酶为催化剂、正己烷为溶剂、n(大豆油)∶n(甲醇)=1∶3、m(大豆油)∶m(水)=5∶1、反应时间为24h、反应液流量1.2mL/m in时,产物中主要脂肪酸甲酯的质量分数可以达到91.87%。展开更多
以麻疯树油为原料,研究了生产生物柴油过程中的酯交换反应条件的影响及反应动力学。结果表明,酯交换反应的适宜操作条件为:油∶甲醇=1∶6(摩尔比),使用油重的1.3%的KOH为催化剂,在64℃下反应20 m in,甲酯收率达98%以上。在优化反应条件...以麻疯树油为原料,研究了生产生物柴油过程中的酯交换反应条件的影响及反应动力学。结果表明,酯交换反应的适宜操作条件为:油∶甲醇=1∶6(摩尔比),使用油重的1.3%的KOH为催化剂,在64℃下反应20 m in,甲酯收率达98%以上。在优化反应条件的基础上,研究了其动力学特征,32℃和51℃时的反应速率常数k分别为0.6627 L/(m in.mol)和0.9474 L/(m in.mol),反应的活化能约为Ea=15.46 kJ/mol。展开更多
文摘This paper represents the prospect of mustard oil as a renewable and alternative fuel. To cope up with present load-shedding situation and to reduce the dependency on imported fuel, Bangladesh government is encour- aging the use of renewable energy sources. Since diesel engines have versatile uses including small irrigation pumping systems, and standby small electricity generators, use of diesel fuel is much higher than any other gasoline fuels. In Bangladesh mustard oil has been in use as edible oil throughout the country. Mustard is a widely growing plant in Bangladesh and every year the production of mustard seed exceeds the demand. So the endeavor was to use the surplus mustard oil as an alternative to diesel fuel. Fuel properties are determined in the fuel testing laboratory with standard procedure. An experimental set-up is then made to study the performance of a small diesel engine in the heat engine laboratory using different blends of bio-diesel converted from mustard oil. It is found that bio-diesel has slightly different properties than diesel fuel. It is also observed that with bio-diesel, the engine is capable of running without difficulty but with a deviation from its optimum performance. Initially different blends of bio-diesel (i.e. B20, B30, B50 etc,) have been used to avoid complicated modification of the engine or the fuel supply system. Finally, a comparison of engine performance for different blends of bio-diesel has been carried out to determine the optimum blend for different operating conditions.
文摘Biodiesel is considering a clean-burning fuel produced from non edible vegetable oils, or animal fats. It is produced by transesterification of oils with short-chain alcohols or by the esterification of fatty acids. In the present context, biodiesel is an alternative eco friendly diesel fuel. Keeping this in view, an attempt has been made through the experiment of Thumba blended biodiesel on CI engine in laboratory and analyzes its properties and characteristic compare with other biodiesel oils. Five blends B05, B10, B15, B20 and B25 of thumba seed oil biodiesel were papered and it performance was evaluated with 7HP four-stroke diesel engine. The performance of thumba seed oil biodiesel were compared with biodiesel prepared by mustard, castor and Jatropha seed oil with same blends.
文摘利用自制的酶柱反应器,通过改变反应液流量、溶剂的种类、反应时间以及水含量等参数,考察了大豆油和甲醇在固定化脂肪酶(Cand ida sp.99-125)催化下进行酯交换反应制备生物柴油的工艺条件,并用气相色谱对产物进行了分析。实验结果表明,反应液流量和水含量对转化率影响比较大,转化率随反应液流量的增加出现先增后减的趋势,采用正己烷为溶剂要优于其它溶剂。当以固定化的脂肪酶为催化剂、正己烷为溶剂、n(大豆油)∶n(甲醇)=1∶3、m(大豆油)∶m(水)=5∶1、反应时间为24h、反应液流量1.2mL/m in时,产物中主要脂肪酸甲酯的质量分数可以达到91.87%。
