Naphtha is an important raw material for manufacture of clean fuels and ethylene products. However, China is experiencing a serious imbalance between supply and demand of naphtha, due to its rapidly increasing car pop...Naphtha is an important raw material for manufacture of clean fuels and ethylene products. However, China is experiencing a serious imbalance between supply and demand of naphtha, due to its rapidly increasing car population and booming ethylene industry, the demand of which cannot be met by the domestic depleting crude oil resources. Focusing on alleviating the above-mentioned naphtha deficit, this paper puts forward an idea suggesting that China＇s limited naphtha resource should be used reasonably. Naphtha feedstocks with more potential aromatic content should be used in catalytic reforming process to produce clean fuel products, and those feedstocks with more paraffinic content should be used in ethylene production. Meanwhile, industry tests show that the low-valued naphtha byproduct from ethylene plants and the products of secondary processing units at refineries can also be applied so as to extend the naphtha supply for manufacture of cleaner fuels and ethylene derivatives.展开更多
In this paper, multi-refinery using the same heavy crude oils as raw materials is studied, while a new nonlinear model for mixed heavy crude distillation is proposed. In practical crude distillation operation, the dis...In this paper, multi-refinery using the same heavy crude oils as raw materials is studied, while a new nonlinear model for mixed heavy crude distillation is proposed. In practical crude distillation operation, the distillate yield and product distribution of distillation units are different due to their various equipment and operating parameters, even the same ratio of raw materials is provided, so different process models for multi-refinery planning is therefore required. For process modeling, the relationships between total yields and mixing ratio of different refineries were determined, which is combined with process simulation using production data. Then,the yields and properties of crude distillation unit(CDU) fractions were calculated with the use of true boiling point(TBP) curves and property curves respectively when the initial cutting temperatures were given. Finally,in order to maximize the economic benefit of distillation, the optimal product distribution and the best mixing ratio of crude oil were calculated under the constraints of different properties of fractions. Comparing to previous models, the proposed model takes the influence of different refinery parameters on production process into account, while avoiding the complex process for determining the cutting points, which is considered more efficient and more accurate with respect to heavy crude refinery. Model was successfully verified by a case study,allowing a significant improvement of the refinery profit to be achieved.展开更多
Oil products such as petroleum have greatly benefited the human society.However,they may lead to safety and health problems if not handled properly.For example,the oil spillage in the Gulf of Mexico caused serious oce...Oil products such as petroleum have greatly benefited the human society.However,they may lead to safety and health problems if not handled properly.For example,the oil spillage in the Gulf of Mexico caused serious ocean contamination and ecosystem damage in 2010.There is an urgent need,therefore,展开更多
With the depletion of fossil resources, there is a need to find alternative resources of fuels and chemicals. The use of renewable feedstock such as those from seed oil processing is one of the best available resource...With the depletion of fossil resources, there is a need to find alternative resources of fuels and chemicals. The use of renewable feedstock such as those from seed oil processing is one of the best available resources that have come to the fore-front recently. This paper critically analyzes and highlights major factors in the biodiesel industry, such as seeds oil composition, production methods, properties of biodiesel, problems and potential solutions of using vegetable seed oil, the composition, quality and effective utilization of crude glycerol, the catalytic conversion of glycerol into possible fuels and chemicals.展开更多
文摘Naphtha is an important raw material for manufacture of clean fuels and ethylene products. However, China is experiencing a serious imbalance between supply and demand of naphtha, due to its rapidly increasing car population and booming ethylene industry, the demand of which cannot be met by the domestic depleting crude oil resources. Focusing on alleviating the above-mentioned naphtha deficit, this paper puts forward an idea suggesting that China＇s limited naphtha resource should be used reasonably. Naphtha feedstocks with more potential aromatic content should be used in catalytic reforming process to produce clean fuel products, and those feedstocks with more paraffinic content should be used in ethylene production. Meanwhile, industry tests show that the low-valued naphtha byproduct from ethylene plants and the products of secondary processing units at refineries can also be applied so as to extend the naphtha supply for manufacture of cleaner fuels and ethylene derivatives.
文摘In this paper, multi-refinery using the same heavy crude oils as raw materials is studied, while a new nonlinear model for mixed heavy crude distillation is proposed. In practical crude distillation operation, the distillate yield and product distribution of distillation units are different due to their various equipment and operating parameters, even the same ratio of raw materials is provided, so different process models for multi-refinery planning is therefore required. For process modeling, the relationships between total yields and mixing ratio of different refineries were determined, which is combined with process simulation using production data. Then,the yields and properties of crude distillation unit(CDU) fractions were calculated with the use of true boiling point(TBP) curves and property curves respectively when the initial cutting temperatures were given. Finally,in order to maximize the economic benefit of distillation, the optimal product distribution and the best mixing ratio of crude oil were calculated under the constraints of different properties of fractions. Comparing to previous models, the proposed model takes the influence of different refinery parameters on production process into account, while avoiding the complex process for determining the cutting points, which is considered more efficient and more accurate with respect to heavy crude refinery. Model was successfully verified by a case study,allowing a significant improvement of the refinery profit to be achieved.
文摘Oil products such as petroleum have greatly benefited the human society.However,they may lead to safety and health problems if not handled properly.For example,the oil spillage in the Gulf of Mexico caused serious ocean contamination and ecosystem damage in 2010.There is an urgent need,therefore,
基金supported by the National Natural Science Foundation of China(21325208,21172209,21272050)the Chinese Academy of Sciences(KJCX2-EW-J02)FRFCU(WK2060190025,WK2060190033)
文摘With the depletion of fossil resources, there is a need to find alternative resources of fuels and chemicals. The use of renewable feedstock such as those from seed oil processing is one of the best available resources that have come to the fore-front recently. This paper critically analyzes and highlights major factors in the biodiesel industry, such as seeds oil composition, production methods, properties of biodiesel, problems and potential solutions of using vegetable seed oil, the composition, quality and effective utilization of crude glycerol, the catalytic conversion of glycerol into possible fuels and chemicals.
