The separation of aromatic hydrocarbons or olefins from paraffins is very important in chemical industry.The volatile organic solvents used are usually harmful to environment and human health.As green solvents,room te...The separation of aromatic hydrocarbons or olefins from paraffins is very important in chemical industry.The volatile organic solvents used are usually harmful to environment and human health.As green solvents,room temperature ionic liquids are potential substitutes for the separation of hydrocarbon products.Activity coefficients at infinite dilution of hydrocarbon solutes,such as alkanes,hexenes,alkylbenzenes and styrene,in 1-butyl-3-methyl imidazolium hexafluorophosphate ([BMIM][PF 6]),1-allyl-3-methylimidazolium tetrafluoroborate ( [AMIM][BF 4]),1-isobutenyl-3-methylimidazolium tetrafluoroborate ([MPMIM][BF 4]) and [MPMIM][BF 4]+AgBF 4 were determined by gas-liquid chromatography.The measurements were carried out at different temperatures between 298.15 K and 318.15 K.The separation effects of these ionic liquids for olefin/paraffin, alkanes/benzene and hexene isomers were discussed.展开更多
The experimental investigation of methane catalytic combustion on coated noble catalyst was carried out,using an integral micoreactor under the condition free of external and internal diffusion limitations.Forty-five ...The experimental investigation of methane catalytic combustion on coated noble catalyst was carried out,using an integral micoreactor under the condition free of external and internal diffusion limitations.Forty-five groups of experimental data for methane conversion were obtained under different space velocities and temperatures.The partial least-square(PLS)and The Nelder-Mead simplex search methods were employed to estimate the parameters of the intrinsic model.The intrinsic model of lean methane catalytic combustion on the HPA(KMK) catalyst is rA=7.32×109 exp(-64 550RT)CA.The parameters obtained are consistent with the Physical-Chemical rules and statistically reasonable.展开更多
The catalytic combustion of low concentration methane was systematically investigated in a pilot scale reverse flow reactor.The influences of cyclic period,the concentration of reactant and the space velocity on the o...The catalytic combustion of low concentration methane was systematically investigated in a pilot scale reverse flow reactor.The influences of cyclic period,the concentration of reactant and the space velocity on the operation performance of reactor were studied.The experimental results showed that,for the reverse flow reactor,cyclic period,the concentration of reactant and the space velocity were three important operation parameters that obviously affected the axial temperature profiles of reactor.It′s possible to maintain autothermal operation with high conversion of methane even though the methane concentration decreased to 0.5%.When the methane concentration was increased up to 0.8%,the highest temperature of catalyst bed was beyond 700 ℃.It suggests that the energy of the hot gas should be recovered and this reactive technology is able to be used in power production with low concentration methane.展开更多
文摘The separation of aromatic hydrocarbons or olefins from paraffins is very important in chemical industry.The volatile organic solvents used are usually harmful to environment and human health.As green solvents,room temperature ionic liquids are potential substitutes for the separation of hydrocarbon products.Activity coefficients at infinite dilution of hydrocarbon solutes,such as alkanes,hexenes,alkylbenzenes and styrene,in 1-butyl-3-methyl imidazolium hexafluorophosphate ([BMIM][PF 6]),1-allyl-3-methylimidazolium tetrafluoroborate ( [AMIM][BF 4]),1-isobutenyl-3-methylimidazolium tetrafluoroborate ([MPMIM][BF 4]) and [MPMIM][BF 4]+AgBF 4 were determined by gas-liquid chromatography.The measurements were carried out at different temperatures between 298.15 K and 318.15 K.The separation effects of these ionic liquids for olefin/paraffin, alkanes/benzene and hexene isomers were discussed.
文摘The experimental investigation of methane catalytic combustion on coated noble catalyst was carried out,using an integral micoreactor under the condition free of external and internal diffusion limitations.Forty-five groups of experimental data for methane conversion were obtained under different space velocities and temperatures.The partial least-square(PLS)and The Nelder-Mead simplex search methods were employed to estimate the parameters of the intrinsic model.The intrinsic model of lean methane catalytic combustion on the HPA(KMK) catalyst is rA=7.32×109 exp(-64 550RT)CA.The parameters obtained are consistent with the Physical-Chemical rules and statistically reasonable.
文摘The catalytic combustion of low concentration methane was systematically investigated in a pilot scale reverse flow reactor.The influences of cyclic period,the concentration of reactant and the space velocity on the operation performance of reactor were studied.The experimental results showed that,for the reverse flow reactor,cyclic period,the concentration of reactant and the space velocity were three important operation parameters that obviously affected the axial temperature profiles of reactor.It′s possible to maintain autothermal operation with high conversion of methane even though the methane concentration decreased to 0.5%.When the methane concentration was increased up to 0.8%,the highest temperature of catalyst bed was beyond 700 ℃.It suggests that the energy of the hot gas should be recovered and this reactive technology is able to be used in power production with low concentration methane.
