The carboxyl terminal of sodium oleate has a stronger polarity than that of oleic acid;this terminal is more likely to be dipole polarized and ionically conductive in a microwave field.Sodium oleate was used as the mo...The carboxyl terminal of sodium oleate has a stronger polarity than that of oleic acid;this terminal is more likely to be dipole polarized and ionically conductive in a microwave field.Sodium oleate was used as the model compound to study the decarboxylation of oleic acid leading to hydrocarbon formation via microwave-assisted pyrolysis technology.The pyrolysis gas,liquid,and solid products were precisely analyzed to deduce the mechanism for decarboxylation of sodium oleate.Microwave energy was able to selectively heat the carboxyl terminal of sodium oleate.During decarboxylation,the double bond in the long hydrocarbon chain formed a p-πconjugated system with the carbanion intermediate.The resulting p-πconjugated system was more stable and beneficial to the pyrolysis reaction(decarboxylation,terminal allylation,isomerization,and aromatization).The physical properties of pyrolysis liquid were generally similar to those of diesel fuel,thereby demonstrating the possible use of microwaves for controlling the decarboxylation of sodium oleate in order to manufacture renewable hydrocarbon fuels.展开更多
A lack of petroleum could easily destabilize world-wide relations and lead to a major war. Also large oil reliant suppliers of such goods as plastics, heating oil and construction material would be at a loss for the n...A lack of petroleum could easily destabilize world-wide relations and lead to a major war. Also large oil reliant suppliers of such goods as plastics, heating oil and construction material would be at a loss for the necessary raw materials. Petroleum reliant power plants would be out of production and the transportation industry would have no gasoline for its vehicle. Apart from this, there is a big need for the protection of the environment. Therefore, it is important to replace the petroleum with non fossil fuels or ones that can be made to last a lot longer, such as the renewable fuels that can be used in the engines and are friendly to the environment too. This paper examines the use of diesel-soy oil mixtures and diesel-olive seed oil mixtures in a four-stroke diesel engine. For those mixtures the gas emissions of carbon monoxide （CO）, hydrocarbons （HC） and nitrogen monoxide （NO） are being measured and the fuel consumption is also examined.展开更多
To use the renewable fuels for marine field is still very limited due to the need of newly developed technology, highly requested safety （for gas fuel） and high price of biodiesel. Therefore, with some advantages, s...To use the renewable fuels for marine field is still very limited due to the need of newly developed technology, highly requested safety （for gas fuel） and high price of biodiesel. Therefore, with some advantages, such as： simple producing process, reasonable price and simple modification technology needed, the blended SVO （straight vegetable oil） is recommended as suitable fuel for the marine application. Even though, there are some disadvantages of the blended SVO, such as a weak stability, layer separation in low temperature and some others. In order to apply the blended SVO as alternative fuel for marine diesel engines without the mentioned disadvantages, the paper will introduce a method to design and produce a fuel continuous mixer to make a blended SVO （palm oil）.展开更多
基金the National Natural Science Foundation of China(No.21266022)the National High Technology Research and Development Program 863(2012AA101800-03+4 种基金2012AA02120562012AA021704)the International Cooperation of Jiangxi Province(No.20101208)the International Science & Technology Cooperation Program of China(No.2010DFB63750)the Natural Science Foundation of Jiangxi Province(No.2008GZH0047)
文摘The carboxyl terminal of sodium oleate has a stronger polarity than that of oleic acid;this terminal is more likely to be dipole polarized and ionically conductive in a microwave field.Sodium oleate was used as the model compound to study the decarboxylation of oleic acid leading to hydrocarbon formation via microwave-assisted pyrolysis technology.The pyrolysis gas,liquid,and solid products were precisely analyzed to deduce the mechanism for decarboxylation of sodium oleate.Microwave energy was able to selectively heat the carboxyl terminal of sodium oleate.During decarboxylation,the double bond in the long hydrocarbon chain formed a p-πconjugated system with the carbanion intermediate.The resulting p-πconjugated system was more stable and beneficial to the pyrolysis reaction(decarboxylation,terminal allylation,isomerization,and aromatization).The physical properties of pyrolysis liquid were generally similar to those of diesel fuel,thereby demonstrating the possible use of microwaves for controlling the decarboxylation of sodium oleate in order to manufacture renewable hydrocarbon fuels.
文摘A lack of petroleum could easily destabilize world-wide relations and lead to a major war. Also large oil reliant suppliers of such goods as plastics, heating oil and construction material would be at a loss for the necessary raw materials. Petroleum reliant power plants would be out of production and the transportation industry would have no gasoline for its vehicle. Apart from this, there is a big need for the protection of the environment. Therefore, it is important to replace the petroleum with non fossil fuels or ones that can be made to last a lot longer, such as the renewable fuels that can be used in the engines and are friendly to the environment too. This paper examines the use of diesel-soy oil mixtures and diesel-olive seed oil mixtures in a four-stroke diesel engine. For those mixtures the gas emissions of carbon monoxide （CO）, hydrocarbons （HC） and nitrogen monoxide （NO） are being measured and the fuel consumption is also examined.
文摘To use the renewable fuels for marine field is still very limited due to the need of newly developed technology, highly requested safety （for gas fuel） and high price of biodiesel. Therefore, with some advantages, such as： simple producing process, reasonable price and simple modification technology needed, the blended SVO （straight vegetable oil） is recommended as suitable fuel for the marine application. Even though, there are some disadvantages of the blended SVO, such as a weak stability, layer separation in low temperature and some others. In order to apply the blended SVO as alternative fuel for marine diesel engines without the mentioned disadvantages, the paper will introduce a method to design and produce a fuel continuous mixer to make a blended SVO （palm oil）.
