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Hydroxyl radical intensified Cu2O NPs/H2O2 process in ceramic membrane reactor for degradation on DMAc wastewater from polymeric membrane manufacturer

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Frontiers of Environmental Science & Engineering 2020年第6期14卷 123-134页

作者： Wenyue Li Min Chen Zhaoxiang Zhong Ming Zhou Weihong Xing State Key Laboratory of Materials Orented Chemical Engineein National Engineering Research Center for Specilized Separation MembranesNanjing Tech UniversityNanjing 21000China

High-concentration industrial wastewater containing N,N-dimethylacetamide(DMAc)from polymeric membrane manufacturer was degraded in Cu2O NPs/H2O2 *** the membrane assisted Fenton process DMAc removal rate was up to 98%with 120 min which was increased by 23%over the batch *** was found that:OH quench time was extended by 20 min and the maximum:0H productivity was notably 88.7%higher at 40 *** degradation reaction rate constant was enhanced by 2.2 times with membrane dispersion(k=0.0349 min^-1).DMAc initial concentration(C0)and H202 flux (Jp)had major influence on mass transfer and kinetics,meanwhile,membrane pore size(rp)and length(L)also affected the Treaction *** intensifed radical yield,fast mass transfer and nanoparticles high activity all contributed to improve pollutant degradation ***-resolved DMAC degradation pathway was analyzed as hydroxylation,demethylation and oxidation leading to the finai products of CO2;H20 and NO3^-(*** NH,from biodegradation).Continuous process was operated in the dual-membrane configuration with in situ reaction and *** five cycling,tests,DMAc removal was all above 95%for the initial[DMAc]0=14,000 mg/L in wastewater and stability of the catalyst and the membrane maintained weil.

关键词： ceramic membrane reactor AyV-dimethylacetamide Fenton process Cu20 Wastewater treatment

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Syngas Production Using an Oxygen-Permeating membrane reactor with Cofeed of Methane and Carbon Dioxide

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Chinese Chemical Letters 2000年第7期11卷 631-634页

作者： Zong Ping SHAO Hui DONG Guo Xing XIONG Wei Shen YANG(State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics,Chinese Academy of Sciences, P.O. Box 110, Dalian 116023) Chinese Acad Sci Dalian Inst Chem Phys State Key Lab Catalysis Dalian 116023 Peoples R China

CH4-CO2-O-2 reforming to syngas in a never *** oxygen-permeable membrane reactor using LiLaNiO/gamma-Al2O3 as catalyst was successfully reported. Excellent reaction performance was achieved with around 92% methane conversion efficiency, 95% CO2 conversion rate, and nearly 8.5mL/***(2) oxygen permeation flux. In contrast to the oxygen permeation model with the presence of large concentration of CO2 (under such condition the oxygen permeation flux deteriorates with time), the oxygen permeation flux is really stable under the CH4CO2-O-2 reforming condition.

关键词： ceramic membrane reactor oxygen permeation methane syngas

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