In order to study synergism of the mixed surfactants system with molecular exchanging energy (E), the Lennard-Jones formula has been firstly introduced to evaluate the E of the mixed system, CH3(CH2)nOSO 3 /CH3(CH2)nN...In order to study synergism of the mixed surfactants system with molecular exchanging energy (E), the Lennard-Jones formula has been firstly introduced to evaluate the E of the mixed system, CH3(CH2)nOSO 3 /CH3(CH2)nN+(CH3)3 directly from their molecular structure. The comparison of the calculated and the observed results showed that this method is practical.展开更多
By using the binary anionic/cationic surfactants system CH3(CH2)nOSO_3/CH3(CH2)nN+(CH3)3 as an ex-ample, the molecular exchanging energy (ε) of adsorption on the surface monolayer of aqueous solu-tion has been studie...By using the binary anionic/cationic surfactants system CH3(CH2)nOSO_3/CH3(CH2)nN+(CH3)3 as an ex-ample, the molecular exchanging energy (ε) of adsorption on the surface monolayer of aqueous solu-tion has been studied. ε can be obtained with two methods. One is from the relationship between ε and the molecule interaction parameter (β). This relationship is founded by considering that the adsorption of mixed surfactants on the surface monolayer of solution satisfies the dimensional crystal model condition under which β can be obtained by testing the surface tension of solution. The other is directly from the molecular structure of surfactants with the Lennard-Jones formula. The results for the studied system show that these two methods coincide well.展开更多
Thioaldehydes and thioketones are candidates of new photoluminescence materials. The time-dependent density functional theory is applied to calculate the absorption and emission wavelengths of ten thiocarbonyl compoun...Thioaldehydes and thioketones are candidates of new photoluminescence materials. The time-dependent density functional theory is applied to calculate the absorption and emission wavelengths of ten thiocarbonyl compounds using both B3LYP and PBEO functionals. The theoretical results are in agreement with the measurable ones. Furthermore, it is found that the maximum absorption and emission wavelengths are linearly correlated to the C-S bond lengths.展开更多
This paper is an eye opening to the new horizon of the design of operational Compressors in our jet engines. That are compressors usually perform an operation called isentropic process and which levitate the pressure ...This paper is an eye opening to the new horizon of the design of operational Compressors in our jet engines. That are compressors usually perform an operation called isentropic process and which levitate the pressure and temperature to the optimum level which require for effective ignition. Basically, our compressors have several sets of blades to perform this function, more precisely saying Rotor and stator blades. Where rotor blade provides air molecule to push at very high velocity to the Stationary blade and when the air Enders to the Stator, the stator races its pressure to move on to the next stage. And we call this set of Stator and rotor as a stage ref [1]. However, in this work, I consider the geometry of the incoming air molecule and how it transforms its physical quantities such as Pressure and temperature ref [2]. For that I tie the concept of Thermodynamic and mechanics on the platform of Tensor analysis ref [3]. That is, I consider the quantities like Pressure, Temperature and rate of flow are their corresponding vector spaces and energy related quintets like heat, work as the scaling elements on the above vector space. And quantities such as entropy enthalpy and specific heat capacity are corresponding physics of it. Considering the advantages, one of the important advantages of this approach is the applicability of results of this work to the formulation of blade less compression Example: Ram and Scram jet engine. Again, the relevant upgrading which is essential for future hypersonic air crafts can achieve from this study and this will be a mile stone for bright air and space travel. To conclude, this approach will be a great transformation on the conventional idea for realization of compression for operational Scram and Ram jet engines ref [4] [5].展开更多
The relationship between activity coefficient and molecule exchanging energy of surfactants in the surface monolayer of binary surfactant aqueous solutions has been deduced with the help of two dimensional crystal mod...The relationship between activity coefficient and molecule exchanging energy of surfactants in the surface monolayer of binary surfactant aqueous solutions has been deduced with the help of two dimensional crystal model. The results show the relationship between the synergism of surfactants and the molecule exchanging energy. Through the parameter of molecule interaction( β s), the value of the molecule exchanging energy can be obtained by equation ε =2.3×10 -24 β s T that has been examined with six typical surfactant systems.展开更多
催化汽油加氢装置在建设阶段修改工艺参数,降低反应器温度,导致分馏塔塔底重沸炉负荷不足,通过调整换热管网,仅移动了一台换热器在换热流程中的位置,使重沸炉的热负荷下降,保证装置的正常运行。使用Aspen Energy Analyzer对该装置换热...催化汽油加氢装置在建设阶段修改工艺参数,降低反应器温度,导致分馏塔塔底重沸炉负荷不足,通过调整换热管网,仅移动了一台换热器在换热流程中的位置,使重沸炉的热负荷下降,保证装置的正常运行。使用Aspen Energy Analyzer对该装置换热网络进行夹点分析,提出优化方案,在原流程的基础上,增加一台换热器,使加氢产物加热炉的热负荷降低16%,充分利用了物流间换热,同时也降低了空冷器的负荷。展开更多
基金the State Natural Science Foundation of China(No.30070178)the Governor Foundation of Guizhou Province for their financial supports.
文摘In order to study synergism of the mixed surfactants system with molecular exchanging energy (E), the Lennard-Jones formula has been firstly introduced to evaluate the E of the mixed system, CH3(CH2)nOSO 3 /CH3(CH2)nN+(CH3)3 directly from their molecular structure. The comparison of the calculated and the observed results showed that this method is practical.
基金Supported by the National Natural Science Foundation of China (Grant Nos. 20676051 and 20573034)the Important Construction Project (Category A) of Shanghai Jiao Tong University (Grant No. AE 150085)
文摘By using the binary anionic/cationic surfactants system CH3(CH2)nOSO_3/CH3(CH2)nN+(CH3)3 as an ex-ample, the molecular exchanging energy (ε) of adsorption on the surface monolayer of aqueous solu-tion has been studied. ε can be obtained with two methods. One is from the relationship between ε and the molecule interaction parameter (β). This relationship is founded by considering that the adsorption of mixed surfactants on the surface monolayer of solution satisfies the dimensional crystal model condition under which β can be obtained by testing the surface tension of solution. The other is directly from the molecular structure of surfactants with the Lennard-Jones formula. The results for the studied system show that these two methods coincide well.
基金Supported by the National Natural Science Foundation of China under Grant No 10375030.
文摘Thioaldehydes and thioketones are candidates of new photoluminescence materials. The time-dependent density functional theory is applied to calculate the absorption and emission wavelengths of ten thiocarbonyl compounds using both B3LYP and PBEO functionals. The theoretical results are in agreement with the measurable ones. Furthermore, it is found that the maximum absorption and emission wavelengths are linearly correlated to the C-S bond lengths.
文摘This paper is an eye opening to the new horizon of the design of operational Compressors in our jet engines. That are compressors usually perform an operation called isentropic process and which levitate the pressure and temperature to the optimum level which require for effective ignition. Basically, our compressors have several sets of blades to perform this function, more precisely saying Rotor and stator blades. Where rotor blade provides air molecule to push at very high velocity to the Stationary blade and when the air Enders to the Stator, the stator races its pressure to move on to the next stage. And we call this set of Stator and rotor as a stage ref [1]. However, in this work, I consider the geometry of the incoming air molecule and how it transforms its physical quantities such as Pressure and temperature ref [2]. For that I tie the concept of Thermodynamic and mechanics on the platform of Tensor analysis ref [3]. That is, I consider the quantities like Pressure, Temperature and rate of flow are their corresponding vector spaces and energy related quintets like heat, work as the scaling elements on the above vector space. And quantities such as entropy enthalpy and specific heat capacity are corresponding physics of it. Considering the advantages, one of the important advantages of this approach is the applicability of results of this work to the formulation of blade less compression Example: Ram and Scram jet engine. Again, the relevant upgrading which is essential for future hypersonic air crafts can achieve from this study and this will be a mile stone for bright air and space travel. To conclude, this approach will be a great transformation on the conventional idea for realization of compression for operational Scram and Ram jet engines ref [4] [5].
文摘The relationship between activity coefficient and molecule exchanging energy of surfactants in the surface monolayer of binary surfactant aqueous solutions has been deduced with the help of two dimensional crystal model. The results show the relationship between the synergism of surfactants and the molecule exchanging energy. Through the parameter of molecule interaction( β s), the value of the molecule exchanging energy can be obtained by equation ε =2.3×10 -24 β s T that has been examined with six typical surfactant systems.
文摘催化汽油加氢装置在建设阶段修改工艺参数,降低反应器温度,导致分馏塔塔底重沸炉负荷不足,通过调整换热管网,仅移动了一台换热器在换热流程中的位置,使重沸炉的热负荷下降,保证装置的正常运行。使用Aspen Energy Analyzer对该装置换热网络进行夹点分析,提出优化方案,在原流程的基础上,增加一台换热器,使加氢产物加热炉的热负荷降低16%,充分利用了物流间换热,同时也降低了空冷器的负荷。
