Renewable fuels like hydrogen and biodiesels can very well suit to diesel engine applications as they address problems of energy scarcity, foreign exchange savings and emission norms. Production of hydrogen and biodie...Renewable fuels like hydrogen and biodiesels can very well suit to diesel engine applications as they address problems of energy scarcity, foreign exchange savings and emission norms. Production of hydrogen and biodiesel to industrial scale with low cost techniques can pave way for their efficient use in engine applications. In view of this, an attempt has been made to operate a modified diesel engine on these high potential renewable fuel combinations. An experimental study was carried out to evaluate the performance, combustion and emission characteristics of diesel engine operated in dual fuel (DF) mode fuelled with esters of honne (EHNO), honge (EHO) oils and hydrogen induction. The study revealed that the brake thermal efficiency increased up to 20% hydrogen energy ratio (HER) and then it decreased. The emissions such as hydrocarbon (HC), Carbon monoxide (CO) and smoke decreased with HER while oxides of nitrogen (NOx) increased. The combustion parameters like peak pressure, ignition delay and heat release rate (HRR) increased with HER.展开更多
文摘Renewable fuels like hydrogen and biodiesels can very well suit to diesel engine applications as they address problems of energy scarcity, foreign exchange savings and emission norms. Production of hydrogen and biodiesel to industrial scale with low cost techniques can pave way for their efficient use in engine applications. In view of this, an attempt has been made to operate a modified diesel engine on these high potential renewable fuel combinations. An experimental study was carried out to evaluate the performance, combustion and emission characteristics of diesel engine operated in dual fuel (DF) mode fuelled with esters of honne (EHNO), honge (EHO) oils and hydrogen induction. The study revealed that the brake thermal efficiency increased up to 20% hydrogen energy ratio (HER) and then it decreased. The emissions such as hydrocarbon (HC), Carbon monoxide (CO) and smoke decreased with HER while oxides of nitrogen (NOx) increased. The combustion parameters like peak pressure, ignition delay and heat release rate (HRR) increased with HER.
文摘建立了以d5-3-氯-1,2-棕榈酸二酯为内标物,面积比法定量测定食用植物油中3-氯-1,2-丙二醇酯(3-MCPD酯)的气相色谱-质谱检测方法。样品加内标后经甲基叔丁基醚溶解,与甲醇钠-甲醇溶液酯交换反应4 min后加酸性溴化钠终止反应。使用液液萃取法进行萃取后,加0.2 m L苯基硼酸于45℃下衍生20 min,进气相色谱-质谱检测。结果表明:该方法操作简单、灵敏度高,最低检出限为10μg/kg。利用该方法研究了不同植物油精炼过程和冷冻储存时间对3-MCPD酯含量的影响,试验表明脱臭工段是产生3-MCPD酯的主要来源,随着植物油储存时间的延长3-MCPD酯含量呈降低趋势。