The Experts below are selected from a list of 1677 Experts worldwide ranked by ideXlab platform
L. N. Lima - One of the best experts on this subject based on the ideXlab platform.
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Kinetic and activation thermodynamic parameters on thermal decomposition of Synthetic Lubricant oils
Journal of Thermal Analysis and Calorimetry, 2007Co-Authors: J. C. O. Santos, Amanda Dantas De Oliveira, C. C. Silva, J. D. S. Silva, A. G. Souza, L. N. LimaAbstract:The kinetic and thermodynamic study of Synthetic Lubricant oils was accomplished in this work, using isothermal and non-isothermal thermogravimetry based on mass loss as a function of time and temperature. The thermodynamic and kinetic behavior of the Synthetic Lubricant oils depends on atmosphere and heating rates used in TG analysis. The kinetic and thermodynamic results were satisfactory, presenting good correlation.
J. C. O. Santos - One of the best experts on this subject based on the ideXlab platform.
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Thermal degradation of Synthetic lubricating oils: Part II – Rheological study
Petroleum Science and Technology, 2017Co-Authors: J. C. O. Santos, I. M. G. Santos, A. G. SouzaAbstract:ABSTRACTThe characterization of thermal degradation process of Synthetic lubricating oils, in relation to its rheological properties, was evaluated in this work. Analyses of the dependence of Synthetic Lubricant viscosity on temperature have been carried out. Synthetic Lubricants were degraded at different temperatures and times, in air atmosphere. After thermal degradation, Synthetic Lubricant oils were characterized by rheological measurements. In general, the increase in degradation temperature led to an increase of the Lubricants viscosity for some Lubricant samples.
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Kinetic and activation thermodynamic parameters on thermal decomposition of Synthetic Lubricant oils
Journal of Thermal Analysis and Calorimetry, 2007Co-Authors: J. C. O. Santos, Amanda Dantas De Oliveira, C. C. Silva, J. D. S. Silva, A. G. Souza, L. N. LimaAbstract:The kinetic and thermodynamic study of Synthetic Lubricant oils was accomplished in this work, using isothermal and non-isothermal thermogravimetry based on mass loss as a function of time and temperature. The thermodynamic and kinetic behavior of the Synthetic Lubricant oils depends on atmosphere and heating rates used in TG analysis. The kinetic and thermodynamic results were satisfactory, presenting good correlation.
Qi-wen Sun - One of the best experts on this subject based on the ideXlab platform.
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Feasibility analysis of high–low temperature Fischer–Tropsch synthesis integration in olefin production
Chemical Engineering Research and Design, 2018Co-Authors: Yi Huang, Qi Chu, Kechang Xie, Qi-wen Sun, Jie FengAbstract:Abstract A novel system combining high- (HTFT) and low-temperature Fischer–Tropsch synthesis (LTFT) in olefin production is proposed. Utilizing syngas from coal gasification as the feed gas, the combined system integrates the advantages of HTFT and LTFT and results in an increased range of products, namely α-olefins (mainly C4, C6, and C8), Synthetic Lubricant, gasoline, diesel, and naphth. The system avoids the risk of product market fluctuation and especially realizes the objective of diversifying production and maximizing economic benefit. Innovative ethylene oligomerization process is suggested to increase the α-olefins production. Different schemes of Fischer–Tropsch synthesis process are simulated by the aid of Aspen Plus software and a feasibility analysis on each of them is also done. In an economic perspective, the optimal ratio of HTFT to LTFT for the HTFT–LTFT combined plant with ethylene oligomerization scheme is 3:2. The project presents a low fresh water consumption of 0.138 kWh/USD, electricity consumption of 3.78 × 10−3 kWh/USD and CO2 emission of 2.52 kWh/USD, and is expected to have a net present value of 8.66 billion USD and an annual average of return on investment of 42.03% under the current crude oil price 0.25–0.31 USD/L (2015–2017). These data demonstrate that the combined system has excellent economic profits and a remarkable ability to resist market risks compared to traditional single HTFT or LTFT process under a low crude oil price (below 0.5 USD/L).
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Process Systems Engineering of High-low Temperature Fischer-Tropsch Synthesis Integration in Olefin Production
Energy Procedia, 2017Co-Authors: Yi Huang, Jie Feng, Qi Chu, Kechang Xie, Qi-wen SunAbstract:Abstract A novel system combing high- and low-temperature Fischer-Tropsch synthesis (HTFT and LTFT) in olefin production is proposed. Utilizing syngas from coal gasification as the feed gas, the combined system integrates the advantages of HTFT and LTFT and results in an increased range of products, namely α-olefins (mainly C4, C6, and C8), Synthetic Lubricant, gasoline, diesel, naphtha, greatly enhancing the system’s market adaptability. The system avoids the risk of product market fluctuation, and especially realizes the objective of diversifying production and maximizing economic benefit. Ethylene oligomerization process is innovatively proposed to increase the α-olefins production. A techno-economic analysis was performed on the above system using Aspen Plus software. Results indicated that the income of α-olefins accounts for at least 20% of the total income of the system and this percentage increases with increasing contribution share of HTFT to the combined synthesis system. From the viewpoint of economic perspective, the optimal ratio of HTFT to LTFT for the HTFT - LTFT combined system with ethylene oligomerization scheme is 3:2. The project is expected to have a net present value of 11.45 billion USD, and internal rate of return of 28.31% under the current economic consumption, which shows excellent economic profits and demonstrates that the combined system presents the remarkable ability to resist market risks compared to traditional stand-alone HTFT or LTFT process under a low oil price scenario.
Hanzhuo Fu - One of the best experts on this subject based on the ideXlab platform.
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DOSS– Based QAILs: As Both Neat Lubricants and Lubricant Additives with Excellent Tribological Properties and Good Detergency
Industrial & Engineering Chemistry Research, 2014Co-Authors: Desuo Yang, Xiao-ling Wang, Hanzhuo FuAbstract:DOSS– (dioctyl sulfosuccinate) based quaternary ammonium ionic liquids (QAILs) were synthesized and used as both neat Lubricants and Lubricant additives. The influence of structure on their miscibility, thermal stability, and tribological property was discussed. These QAILs are low cost as compared with conventional halogen-containing ionic liquids (ILs). They are noncorrosive and hydrolysis stable because of their halogen-free characteristics. The tribological properties of these QAILs as neat Lubricants for steel/steel and steel/copper contacts are found to be better than conventional halogen-containing ILs 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (L-F104) and far better than traditional Synthetic Lubricant poly-α-olefin (PAO). Moreover, oil-soluble ILs were obtained by properly adjusting the chain length and cation asymmetry of these QAILs, which can be easily dissolved in nonpolar Synthetic-oil PAO. They are found to be effective Lubricant additives for improving the friction-redu...
Jie Feng - One of the best experts on this subject based on the ideXlab platform.
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Feasibility analysis of high–low temperature Fischer–Tropsch synthesis integration in olefin production
Chemical Engineering Research and Design, 2018Co-Authors: Yi Huang, Qi Chu, Kechang Xie, Qi-wen Sun, Jie FengAbstract:Abstract A novel system combining high- (HTFT) and low-temperature Fischer–Tropsch synthesis (LTFT) in olefin production is proposed. Utilizing syngas from coal gasification as the feed gas, the combined system integrates the advantages of HTFT and LTFT and results in an increased range of products, namely α-olefins (mainly C4, C6, and C8), Synthetic Lubricant, gasoline, diesel, and naphth. The system avoids the risk of product market fluctuation and especially realizes the objective of diversifying production and maximizing economic benefit. Innovative ethylene oligomerization process is suggested to increase the α-olefins production. Different schemes of Fischer–Tropsch synthesis process are simulated by the aid of Aspen Plus software and a feasibility analysis on each of them is also done. In an economic perspective, the optimal ratio of HTFT to LTFT for the HTFT–LTFT combined plant with ethylene oligomerization scheme is 3:2. The project presents a low fresh water consumption of 0.138 kWh/USD, electricity consumption of 3.78 × 10−3 kWh/USD and CO2 emission of 2.52 kWh/USD, and is expected to have a net present value of 8.66 billion USD and an annual average of return on investment of 42.03% under the current crude oil price 0.25–0.31 USD/L (2015–2017). These data demonstrate that the combined system has excellent economic profits and a remarkable ability to resist market risks compared to traditional single HTFT or LTFT process under a low crude oil price (below 0.5 USD/L).
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Process Systems Engineering of High-low Temperature Fischer-Tropsch Synthesis Integration in Olefin Production
Energy Procedia, 2017Co-Authors: Yi Huang, Jie Feng, Qi Chu, Kechang Xie, Qi-wen SunAbstract:Abstract A novel system combing high- and low-temperature Fischer-Tropsch synthesis (HTFT and LTFT) in olefin production is proposed. Utilizing syngas from coal gasification as the feed gas, the combined system integrates the advantages of HTFT and LTFT and results in an increased range of products, namely α-olefins (mainly C4, C6, and C8), Synthetic Lubricant, gasoline, diesel, naphtha, greatly enhancing the system’s market adaptability. The system avoids the risk of product market fluctuation, and especially realizes the objective of diversifying production and maximizing economic benefit. Ethylene oligomerization process is innovatively proposed to increase the α-olefins production. A techno-economic analysis was performed on the above system using Aspen Plus software. Results indicated that the income of α-olefins accounts for at least 20% of the total income of the system and this percentage increases with increasing contribution share of HTFT to the combined synthesis system. From the viewpoint of economic perspective, the optimal ratio of HTFT to LTFT for the HTFT - LTFT combined system with ethylene oligomerization scheme is 3:2. The project is expected to have a net present value of 11.45 billion USD, and internal rate of return of 28.31% under the current economic consumption, which shows excellent economic profits and demonstrates that the combined system presents the remarkable ability to resist market risks compared to traditional stand-alone HTFT or LTFT process under a low oil price scenario.
