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- 저자 : Junteng Liu (검색결과 2 건)
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Filtration and regeneration behavior of polytetrafluoroethylene membrane for dusty gas treatment
Weidong Zhang,Deqiang Jiang,Junteng Liu,Zhongqi Ren,Wang Geng 한국화학공학회 2008 Korean Journal of Chemical Engineering Vol.25 No.4
With micron talcum particles and nano-CaCO3 powder as test dust, a series of experiments have been carried out to systematically study the gas filtration and regeneration behavior of polytetrafluoroethylene membrane, and some comparisons were made with common filter media. The experimental results showed that the PTFE membrane had a filtration efficiency of above 99.99% for micron particles, and excellent regeneration behavior was obtained, though a much higher initial pressure drop existed. Based on the results, it was concluded that the PTFE membrane is an excellent surface-filtration media for micron particles. Effects of operation parameters, including airflow velocity, particle concentration and particle characteristics were also investigated. To better understand the evolution of pressure drop during the filtration process, a mathematical model with operation parameters and characteristics of particles was derived from the gas-solid two-phase flow theories. A novel method on the determination of regeneration period of the filter media was put forward based on the analysis of the pressure drop according to this model
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Extraction separation of toluene/cyclohexane with hollow fiber supported ionic liquid membrane
Fan Zhang,Zhongqi Ren,Wei Sun,Junteng Liu,Weidong Zhang 한국화학공학회 2014 Korean Journal of Chemical Engineering Vol.31 No.6
A supported liquid membrane with ionic liquid was used for the separation of toluene/cyclohexane. Theinteractions of ionic liquid with toluene and cyclohexane were calculated and experimentally studied by quantum chemicalcalculation and liquid-liquid extraction process. The results showed [BPy][BF4] have stronger interaction with toluenethan that with cyclohexane. The selectivity of SILM processes was larger than 10 at the temperature of 323 K and theflow rate of 13.5 mL·min-1 on both shell side and lumen side. Due to the higher viscosity of IL, SILM process hadgood long-term stability. As the effects of mass transfer driving force of SILM process, the flux and removal efficiencyincreased with increase of initial toluene concentration, while the selectivity decreased because of the competitive transport. Base on the resistance in-series model and experimental results, the mass transfer resistance was mainly lay liquidmembrane phase. The influence of flow rates on both sides was slight. The higher temperature could enhance the masstransfer performance significantly. The removal efficiency increased from 28.2% to 45.1% with the increasing of operationtemperature from 298 K to 323 K.
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