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Guo R.-T.,Shanghai University of Electric Power | Pan W.-G.,Shanghai University of Electric Power | Zhang X.-B.,Shanghai University of Electric Power | Xu H.-J.,Shanghai University of Electric Power | And 3 more authors.
Separation Science and Technology (Philadelphia) | Year: 2013

NO is a major air pollutant from coal-fired power plants. A combined removal of SO2 and NO is a prospective process. In this paper, the absorption kinetics of NO into weakly acidic NaClO solution was studied in a stirred tank reactor. It was proven that the absorption process occurred under the fast pseudo-mth reaction regime, and the reaction was found to be first-order with respect to both NO and NaClO. When the initial pH value of NaClO solution is 5.5, it has the best performance for NO absorption. The frequency factor and the average activation energy of this reaction were 7.96 × 108 m3/(mol s) and 28.15 kJ/mol, respectively. The absorption rate of NO increased with increasing reaction temperature. © 2013 Copyright Taylor and Francis Group, LLC.


Guo R.-T.,Shanghai University of Electric Power | Zhou Y.,Shanghai University of Electric Power | Pan W.-G.,Shanghai University of Electric Power | Hong J.-N.,Shanghai University of Electric Power | And 4 more authors.
Journal of Industrial and Engineering Chemistry | Year: 2013

CeO2/Al2O3 catalysts prepared by three methods were investigated for selective reduction of NO with NH3. It was found that the catalyst prepared by the single step sol-gel method had the best SCR activity and SO2 resistance performance. From the results of BET, XRD, TPD and TPR, it can be concluded that large surface area, strong interaction, highly dispersed nano-crystalline ceria, high NH3 adsorption capacity and good redox ability might be the main reasons for the excellent performance of CeO2/Al2O3 catalyst prepared by the single step sol-gel method. © 2013 The Korean Society of Industrial and Engineering Chemistry.


Guo R.-T.,Shanghai University of Electric Power | Zhen W.-L.,Shanghai University of Electric Power | Pan W.-G.,Shanghai University of Electric Power | Zhou Y.,Shanghai University of Electric Power | And 6 more authors.
Journal of Industrial and Engineering Chemistry | Year: 2014

CeO2-CuO catalyst prepared by citric acid method was investigated for selective catalytic reduction of NO with NH3. The activity of the CeO2 catalyst was enhanced about 8-27% in the temperature range of 125-225°C at a space velocity of 28,000h-1 by the addition of Cu. It was found that the state of Cu species had great impact on the SCR performance of CeO2-CuO catalyst. Cu2+ can enhance the low temperature activity of SCR reaction, while CuO would promote NH3 oxidation before SCR reaction at high temperature, which would cause the decrease of its high temperature SCR activity. © 2013 The Korean Society of Industrial and Engineering Chemistry.


Xu Y.,Shanghai JiaoTong University | Jin Q.,SEC IHI Power Generation Environment Protection Engineering Co. | Yuan J.,Shanghai JiaoTong University
Proceedings of the 30th Chinese Control Conference, CCC 2011 | Year: 2011

Selective catalytic reduction (SCR) technology is the most common method to reduce NOx emissions from coal-fired power plants. The design and development of SCR facilities is a complicate process involving the optimization of several parameters such as the strategy of ammonia injecting, the geometric design of gate leaf as well as the performance of the SCR monolith catalyst. Among them, the geometric design of gate leaf determines the uniform distributions of the ammonia concentration and the velocity at the entrance of the catalyst layer, which are the key factors to affect the efficiency of flue gas denitrification (DeNOx) system and the catalyst life. In this work, three-dimensional CFD simulations are carried out for the SCR-DeNO x facility of a 300MW coal-fired power plant. The influence of the gate leaves at the turning and at the diameter variable on the distributions of the velocity and the concentration are investigated. The results of the optimal design of the gate leaves are shown as well. © 2011 Chinese Assoc of Automati.


Guo R.-T.,Shanghai University of Electric Power | Guo R.-T.,Shanghai Power Generation Environment Protection Research Center | Pan W.-G.,Shanghai University of Electric Power | Pan W.-G.,Shanghai Power Generation Environment Protection Research Center | And 8 more authors.
Environmental Progress and Sustainable Energy | Year: 2013

Absorption experiments of NO2 from simulated flue gas into aqueous (NH4)2SO3 solution were performed in a stirred tank reactor under atmosphere pressure. As can be seen from the experimental results, the absorption rate of NO2 into (NH 4)2SO3 solution increases as the (NH 4)2SO3 concentration increases from 0.01 to 0.06 mol/L. As the concentration of (NH4)2SO3 solution exceeds 0.06 mol/L, the absorption process becomes gas-film controlled. And the absorption rate increases with increasing NO2 inlet concentration but decreases with increasing reaction temperature. Compared with Na2SO3 solution, (NH4)2SO 3 solution has higher NO2 absorption rate. Copyright © 2012 American Institute of Chemical Engineers.


Pan W.-G.,Shanghai University of Electric Power | Pan W.-G.,Shanghai Power Generation Environment Protection Research Center | Guo R.-T.,Shanghai University of Electric Power | Guo R.-T.,Shanghai Power Generation Environment Protection Research Center | And 8 more authors.
Environmental Progress and Sustainable Energy | Year: 2013

The absorption process of NO into KMnO4/(NH4) 2CO3 solutions was studied in a stirred tank reactor. The experimental results showed that the reaction process was a fast pseudo-m reaction. The reaction between NO and aqueous solutions of KMnO 4/(NH4)2CO3 was found to be first-order with respect to NO and with respect to KMnO4. The frequency factor and the average activation energy of this reaction were 2.3 × 109 m3/(mol s) and 36.77 kJ/mol, respectively. Copyright © 2012 American Institute of Chemical Engineers.


Guo R.-T.,Shanghai University of Electric Power | Guo R.-T.,Shanghai Power Generation Environment Protection Research Center | Pan W.-G.,Shanghai University of Electric Power | Pan W.-G.,Shanghai Power Generation Environment Protection Research Center | And 6 more authors.
Korean Journal of Chemical Engineering | Year: 2013

Experiments were performed in a stirred tank reactor to study the absorption kinetics of NO into aqueous solutions of NaClO2/(NH4)2CO3 solutions. The absorption process is a fast pseudo-reaction, and the reaction was found to be second-order with respect to NO and first-order with respect to NaClO2, respectively. The frequency factor and the average activation energy of this reaction were 4. 56×1011 m6/(mol2 s) and 33. 01 kJ/mol respectively. The absorption rate of NO increased with increasing reaction temperature, but decreased with increasing (NH4)2CO3 solution. © 2012 Korean Institute of Chemical Engineers, Seoul, Korea.


Guo R.-T.,Shanghai University of Electric Power | Pan W.-G.,Shanghai University of Electric Power | Zhang X.-B.,Shanghai University of Electric Power | Ren J.-X.,Shanghai University of Electric Power | And 3 more authors.
Fuel | Year: 2011

Removal of NO was studied in a lab-scale bubbling reactor. Effects of operation parameters such as pH value, H2O2 concentration, NO inlet concentration and reaction temperature on NO removal efficiency were investigated. The operation parameters included 250-1000 ppm NO, 0.5-1.5 mol/L H2O2, FeSO4 0.05 mol/L, 2-6 pH, 25-70 °C. As can be seen from the experimental results, pH value had a great impact on NO removal efficiency. The experimental results indicated that the gas-liquid reaction between NO and Fenton reagent solution was liquid-film controlled as NO inlet concentration exceeded 600 ppm. And NO removal efficiency decreased with increasing reaction temperature. © 2011 Elsevier Ltd. All rights reserved.


Pan W.,Shanghai University of Electric Power | Zhang X.,Shanghai University of Electric Power | Guo R.,Shanghai University of Electric Power | Zhou Y.,Shanghai University of Electric Power | And 2 more authors.
Energy Sources, Part A: Recovery, Utilization and Environmental Effects | Year: 2015

Molar reaction Gibbs function change, molar reaction enthalpy change, equilibrium constant, and the equilibrium partial pressure of SO2 and NO for the reaction of simultaneous removal of SO2 and NO by using aqueous KMnO4/ammonia solution are calculated based on the principle of chemical thermodynamics. The results show that simultaneous removal of SO2 and NO by using KMnO4/ ammonia solution is available. Copyright © 2015 Taylor & Francis Group, LLC.


Guo R.-T.,Shanghai University of Electric Power | Pan W.-G.,Shanghai University of Electric Power | Zhang X.-B.,Shanghai University of Electric Power | Jin Q.,SEC IHI Power Generation Environment Protection Engineering Co. | And 2 more authors.
Energy Sources, Part A: Recovery, Utilization and Environmental Effects | Year: 2014

Magnesium hydrate is the absorbent in magnesia scrubbing wet flue gas desulfurization. Its dissolution rate has a great impact on the performance of SO2 removal. Further, magnesia is the heat decomposition product of magnesite. The effect of magnesite heat decomposition temperature on the dissolution rate of magnesium hydrate is investigated in this study. As can be seen from the experimental results, magnesium hydrate dissolution rate increased with increasing heat decomposition temperature up to 700°C and then decreased with the increase of heat decomposition temperature. This is caused by the change of magnesite heat decomposition mechanism at a different heat decomposition temperature. Copyright © Taylor and Francis Group, LLC.

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