Liu Z.,Zhejiang University of Science and Technology |
Chen Y.,Zhejiang Normal University |
Hu S.,Zhejiang Environmental Monitoring Engineering Ltd Company |
Qiu J.,Zhejiang University of Science and Technology |
And 2 more authors.
Chemical Engineering Transactions | Year: 2016
In the present study, electrochemical treatment experiments were conducted to degrade water-based printing ink wastewater. It was performed with ruthenium oxide coated titanium acting as anode and stainless steel tube as cathode. Electrolyses carried out in batch under steady conditions and operating at constant flow velocity between 0.538×10-3 and 6.129×10-3m/s. The evolution of color and COD removal, the value of pH were found to be inter-related. The kinetics for the concentration decays of the wastewater pseudo first-order reaction that is characteristic for a mass transfer controlled operation. The mass transfer coefficient kc increased with increasing flow velocity and Reynolds number. The evolution of color and COD removal, the value of pH were found to be inter-related. The effect of the parameters on current efficiency and energy cost has also been investigated. The tubular electrochemical reactor could be considered a feasible and an effective alternative system for the electrochemical treatment of water-based printing ink wastewater. Copyright © 2016, AIDIC Servizi S.r.l.
Ju Y.-M.,Zhejiang Environmental Monitoring Engineering Co. |
Xie L.-M.,Zhejiang Environmental Monitoring Engineering Co. |
Zhang Q.-F.,Zhejiang University of Technology
Huaxue Gongcheng/Chemical Engineering (China) | Year: 2015
In order to study the detailed chemical reaction model (elementary reactions) of hydrogen sulfide (H2S) decomposition in dielectric barrier discharge non-thermal plasma (DBD-NTP) under argon (Ar) atmosphere, based on a series of model hypothesis and hydraulic equivalent diameter model (Re similarity), the chemical kinetics was simulated via 10 species and 11 reactions chemical kinetics model in H2S decomposition using Plasma-PFR model in Chemkin. The simulation result matches well with the experimental data. The results show that the relative error is less than 10% between simulation result and experimental data at low volume fraction (initial H2S volume fraction is 5%-15%); the relative error is 10%-30% at high volume fraction (initial H2S volume fraction is 20%-25%). The volume fraction of products from H2S decomposition in DBD-NTP follows the successive order of H2>S4>S>S2, in which φ(S4)∶φ(S)∶φ(S2)≈104∶3∶1, and most of mass balance rate is more than 90% at low volume fraction condition. ©, 2015, Editorial Office of Chemical Engineering (China). All right reserved.
Ju Y.,Zhejiang Environmental Monitoring Engineering Co. |
Yuan C.,Zhejiang Lead Production Technical Co. |
Zhang Q.,Zhejiang University of Technology |
Ding H.,Zhejiang Environmental Monitoring Engineering Co. |
Xie L.,Zhejiang Environmental Monitoring Engineering Co.
Shiyou Huagong/Petrochemical Technology | Year: 2016
The thermochemical equilibrium of the syngas production through methyl acetate steam reforming was calculated by the Gibbs free energy minimization method. The effects of temperature, ratio of water to methyl acetate and pressure on the product composition were investigated. The results showed that, with temperature rise, the syngas content in the products increased obviously, and the ratio of H2 to CO, CH4 content and CO2 content decreased. In the temperature range of 800-1 000℃, the syngas content reached maximum and the ratio of H2 to CO was relatively stable, which was beneficial to the syngas production. Above 800℃, the syngas content firstly increased and then decreased with increasing the ratio of water to methyl acetate and the suitable ratio was 4. With pressure rise, the syngas content in the products decreased, the CH4 and CO2 contents increased, and low reaction pressure was favorable to the syngas production. Under the conditions of 800-1 000℃, ratio of water to methyl acetate 4 and normal pressure, the syngas content could reach 86%(φ). © 2016, SINOPEC Beijing Research Institute of Chemical Industry. All right reserved.
Ju Y.,Zhejiang Environmental Monitoring Engineering Co |
Zhang K.,Hangzhou Hangyang Co. |
Ding H.,Zhejiang Environmental Monitoring Engineering Co |
Zheng M.,Institute of Zhejiang Environmental Protection Design & Research Co |
And 2 more authors.
Huaxue Fanying Gongcheng Yu Gongyi/Chemical Reaction Engineering and Technology | Year: 2015
Syngas production from coke oven gas(COG) with non-catalytic partial oxidation(NCPO) was simulated with Curran detailed reaction mechanism using Chemkin software. Concentration of the main species evolved with time and the effects of operation parameters, such as reaction temperature, reaction pressure and molar ratio of O2 to COG, on the dynamic time, syngas mole fraction and molar ratio of H2 to CO, were investigated. The simulation results showed that under the industrial relevant operating conditions, the simulated syngas (H2+CO) mole fraction and molar ratio of H2 to CO were in agreement with the industrial data, the scale of COG with NCPO dynamic time was ms. The higher the reaction temperature, the shorter dynamic time. At the temperature above 1 373 K, dynamic time did not reduced obviously. The bigger the reaction pressure, the shorter the dynamic time. After the pressure increase to 3.0 MPa, dynamic time reduced slightly. The higher the molar ratio of O2 to COG, the shorter the dynamic time, but the lower the syngas mole fraction and the molar ratio of H2 to CO. As the molar ratio of O2 to COG was more than 0.262, molar ratio of H2 to CO did not descend evidently, keep in the range of 2.0-2.5. ©, 2015, Zhejiang University. All right reserved.