Papers by Author: Ping Lu

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Authors: Mei Jin, Li Yan Zhou, Ping Lu, Guo Xian Yu
Abstract: The MDEA-PZ binary system and the MDEA-PZ-MEA/DEA/ETA/TETA ternary system were used to absorb CO2 from the simulated flue gas. The experimental results showed that the best performance of the absorption of CO2 was achieved under the mass ratio of MDEA to PZ of 10/4 in the MDEA-PZ binary system. In the MDEA-PZ-MEA/DEA/ETA/TETA ternary system, due to the different molecular structure of the additives, the absorption performance of CO2 was determined as follows: MDEA-PZ-TETA>MDEA-PZ-ETA>MDEA-PZ-MEA>MDEA-PZ-DEA. In the MDEA- PZ- TETA ternary system, the better absorption performance could be reached at the volume ratio of MDEA-PZ to TETA of 1:2. Moreover, it was indicated that there was a weakly negative interaction among MDEA, PZ and TETA.
2201
Authors: Mei Jin, Li Yan Zhou, Ping Lu, Jin Huang Wang, Guo Xian Yu
Abstract: The absorption performance of CO2 using MDEA-PZ-TETA ternary absorbent in a rotating packed bed was investigated. The effects of the concentration of the ternary absorbent, the absorbing liquid temperature, the rotating speed, the liquid flow rate and gas flow rate on the absorption performance of CO2 were discussed in detail. The experimental results showed that the optimum absorption condition was the absorbent concentration of 0.05 mol/L, the absorption temperature of 290 K, the rotating speed of 454 rpm and the ratio of gas to liquid of 1.2, which could provide a molar absorption saturated capacity of 1.3688 molCO2/molAm and a satisfying CO2 absorptivity of 93.18%.
645
Authors: Mei Jin, Li Zhan, Ping Lu, Guo Xian Yu
Abstract: The effect of steam, fed to the fixed-bed microreactor reactor, on the oxidative dehydrogenation of cyclohexane over Mg3(VO4)2 catalyst was reported. The catalyst characterization results showed that the crystal structure, the electron cloud distributions of the active species and the oxygen species, and the reducibility of the active species are not influence by the introduction of steam. It was observed that steam added to the oxidative dehydrogenation of cyclohexane competes for sites required for gas-phase oxygen activation, which catalyst lattice oxygen utilization is not affected. The shorter residence time and the competition for sites with oxygen causes a decrease in cyclohexane conversion and a corresponding increase in selectivity to cyclohexene.
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Authors: Fei Wu, Jie Wu, Mei Jin, Fang Wang, Ping Lu
Abstract: Based on acetone-H2O system, the influence of the gas-liquid distribution inducer on the mass transfer coefficient in the rotating packed bed with the stainless steel packing was investigated. Furthermore, the absorption performance was also obtained under the experimental condition of the rotational speed of 630 rpm, the gas flow rate of 2 m3/h and the liquid flow rate of 100 L/h in the rotating packed bed with different types and different installation ways of the distribution inducer. The experimental results showed that the volumetric mass transfer coefficient Kyα per unit contact length of gas-liquid was increased by 8.6% for the forward-curved fixed blade, by 19.8% for the backward-curved rotor blade and by 33.2% with the combination of the straight radial rotor blade and the backward-curved fixed blade, respectively. Furthermore, when the gas flow rate was 2.5 m3/h, Kyα per unit contact length of gas-liquid was increased by 2.9% for the forward-curved fixed blade, by 25.3% for the backward-curved rotor blade, by 42.7% for the combination of the straight radial rotor blade and the backward-curved fixed blade, respectively. The results indicated that the distribution inducer play an important role on the improvement of the mass transfer coefficient in acetone-H2O system.
277
Authors: Mei Jin, Ping Lu, Guo Xian Yu
Abstract: A Mg3(VO4)2 catalyst was synthesized and investigated for the oxidative dehydrogenation of cyclohexane to cyclohexene. Integral measurements were performed to determine the reaction network and products distribution, and differential measurements for kinetic investigations. The kinetic study indicated the oxidative dehydrogenation of cyclohexane to cyclohexene follow a parallel-consecutive network. The power law kinetic model was considered as a rough approximation of the experimental results. The rate constants, which included the activation energies, the pre-exponential factors as well as the orders of cyclohexane and oxygen, were evaluated.
379
Authors: Mei Jin, Ping Lu, Guo Xian Yu
Abstract: Oxidative dehydrogenation of cyclohexane was studied over three pure Mg-V-O catalysts, which are Mg3(VO4)2, Mg2V2O7 and MgV2O6, respectively. Catalysts were prepared via citric acid complexation and characterized by N2-adsorption, XRD, FT-IR, NH3-TPD and H2-TPR techniques. Among the pure magnesium vanadates, Mg3(VO4)2 has the isolated active sites, weakly basic surface and lower reducibility of the metal cations, and could be recognized as the catalytic active phase. Mg3(VO4)2 catalyst exhibited a better catalytic performance, on which a cyclohexene selectivity of 41.5% at cyclohexane conversion of 15.5% was obtained.
692
Authors: Mei Jin, Li Yan Zhou, Ping Lu, Jin Huang Wang, Guo Xian Yu
Abstract: The absorption performance of CO2 from the simulated flue gas using fresh MDEA-PZ-TETA absorbent and the desorption behavior of CO2 from the CO2-saturated absorbent were investigated. In the process of CO2 absorption, the absorption temperature and the inlet flow rate of CO2 played important effects on the absorption performance. The experimental results showed that the suitable absorption condition of CO2 using fresh absorbent was the absorption temperature of 20 oC for 18 min and the inlet flow rate of CO2 of 50 mL/min. In the process of CO2 desorption from the used absorbent, the desorption temperature played an important role and the regeneration time had little effect on the desorption behavior. The suitable desorption condition was the desorption temperature of 105 oC for 1.0 h and the regeneration time of 1.
1721
Authors: Hong Guan Wu, Mei Jin, Fang Wang, Guo Xian Yu, Ping Lu
Abstract: Performance of simultaneous desulfurization and denitrification from N2-NO-SO2 simulated flue gas using sodium chlorite as the additive and urea as the reductant in a rotating packed bed was investigated. In RPB, various rotational speeds, the flow rates of SO2, the flow rates of NO and the liquid flow rates were studied by means of the calculation of the removal efficiencies of SO2 and NO. The experimental results showed that the removal efficiency of SO2 was higher than 99.00% under various experimental conditions, while the removal efficiency of NO exhibited different results. A better simultaneous desulfurization and denitrification behavior could be obtained under the conditions of a SO2-NO-N2 simulated flue gas with the ratio of SO2/NO/ N2=6:4:8.33(v), a rotational speed of 460 rpm and an absorbent flow rate of 120 L/h.
183
Authors: Mei Jin, Guo Xian Yu, Fang Wang, Ping Lu
Abstract: In this work, simultaneous absorption of SO2 and NO from N2-NO-SO2 simulated flue gas using sodium chlorate as the additive and urea as the reductant was investigated experimentally in a rotating packed bed. In RPB, various rotational speeds, gas flow rates and liquid flow rates were studied by means of the removal efficiency of SO2 and NO. The experimental results showed that the removal efficiency of SO2 was higher than 99.00% under various experimental conditions and, at the same time, the removal efficiency of NO exhibited different results under various experimental conditions. The simultaneous NO removal efficiency of 82.45% and the SO2 removal efficiency of 99.49% could be obtained under the N2 flow rate of 0.5 m3/h, SO2 flow rate of 6 mL/min, the NO flow rate of 4 mL/min, the rotational speed of 460 rpm and the absorbent flow rate of 40 L/h.
187
Authors: Fang Wang, Ting Chen, Mei Jin, Ping Lu
Abstract: The simultaneous desulfurization and denitrification performance from the N2-SO2-NO simulated flue gas using the urea solution as the reduction absorbent and piperazine as the additive was investigated. The influences of the concentration of urea solution and the concentration of piperazine solution on the simultaneous desulfurization and denitrification behavior were also discussed. The experimental results showed that the addition of piperazine in the urea solution could enhance the denitrification performance, which could result the desulfurization efficiency of 94.07% and the denitrification efficiency of 85.11%.
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