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Chinese Journal of Chemical Engineering 2024年第1期65卷 1-7页

作者： Risheng Shen Shilong Li Yuqing Sun Yuan Bai Jian Lu wenheng jing State Key Laboratory of Materials-Oriented Chemical Engineering Nanjing Tech UniversityNanjing 210009China National Energy Group Science and Technology Research Institute Co. Ltd.Nanjing 210023China

Membrane technology has become the mainstream process for the production of electronic grade hydrogen peroxide(H_(2)O_(2)).But due to the oxidation degradation of the organic membranes(***)by the strong oxidative radicals(e.g.OH)generated via the activation of H_(2)O_(2)by iron ions(Fe^(3+)),the short effective lifetime of membranes remains a *** nano tin oxide(SnO_(2))has great potential for the removal of Fe^(3+)in strongly oxidative H_(2)O_(2)because of its ability to stabilize H2O_(2)and preferentially adsorb Fe^(3+).Herein,we have designed for the first time a flower-like robust SnO_(2)membrane on the ceramic support by in situ template-free one-step hydrothermal *** three-dimensional loose pore structure in the membrane built by interlacing SnO_(2)nanosheets endows the SnO_(2)membrane with a high specific surface area and abundant adsorption sites(AOH).Based on the coordination complexation and electrostatic attraction between the SnO_(2)surface and Fe^(3+),the membrane shows a high Fe3+removal efficiency(83%)and permeability(24 L·m^(-2)·h^(-1)·MPa^(-1))in H_(2)O_(2).This study provides an innovative and simple approach to designing robust SnO_(2)membranes for highly efficient removal of Fe^(3+)in harsh environments,such as strong oxidation conditions.

关键词： Hydrogen peroxide SnO_(2)membrane Adsorption Hydrothermal

Interlayer-confined two-dimensional manganese oxide-carbon nanotube catalytic ozonation membrane for efficient water purification

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Frontiers of Chemical Science and Engineering 2022年第5期16卷 731-744页

作者： Dean Xu Tong Ding Yuqing Sun Shilong Li wenheng jing State Key Laboratory of Materials-Oriented Chemical Engineering Nanjing Tech UniversityNanjing 210009China

Catalytic ozonation technology has attracted copious attention in water purification owing to its favorable oxidative degradation of pollutants and mitigation of membrane fouling ***,its extensive industrial application has been restricted by the low ozone utilization and limited mass transfer of the short-lived radical *** space-confined catalysis has been theoretically proven to be a viable strategy for achieving high catalytic ***,a two-dimensional MnO_(2)-incorporated ceramic membrane with tunable interspacing,which was obtained via the intercalation of a carbon nanotube,was designed as a catalytic ozonation membrane reactor for degrading methylene *** from the abundant catalytic active sites on the surface of two-dimensional MnO_(2) as well as the ultralow mass transfer resistance of fluids due to the nanolayer confinement,an excellent mineralization effect,i.e.,1.2 mg O_(3)(aq)mg^(-1) TOC removal(a total organic carbon removal rate of 71.5%),was achieved within a hydraulic retention time of 0.045 s of pollutant ***,the effects of hydraulic retention time and interlayer spacing on methylene blue removal were ***,the mechanism of the catalytic ozonation employing catalytic ozonation membrane was proposed based on the contribution of the Mn(III/IV)redox pair to electron transfer to generate the reactive oxygen *** innovative twodimensional confinement catalytic ozonation membrane could act as a nanoreactor and separator to efficiently oxidize organic pollutants and enhance the control of membrane fouling during water purification.

关键词： catalytic membrane reactor catalytic ozonation nanoconfinement two-dimensional manganese oxide

Temperature-induced hydrophobicity transition of MXene membrane for directly preparing W/O emulsions

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Chinese Journal of Chemical Engineering 2023年第3期55卷 59-62页

作者： Yingxiang Ni Can Yuan Shilong Li Jian Lu Lei Yan Wei Gu Weihong Xing wenheng jing State Key Laboratory of Materials-Oriented Chemical Engineering Nanjing Tech UniversityNanjing 210009China

Although hydrophilic membranes are desired for reducing resistance to water permeation, hydrophilic surfaces are not used in the water-in-oil(W/O) membrane emulsification process because water spreads on the hydrophilic surface without forming droplets. Here, we report that a hydrophilic ceramic membrane can form a hydrophobic interface in diesel at a higher temperature;interestingly, the experiments show that the contact angle increases when the temperature rises. The hydrophilic membrane surface evolves into a hydrophobic interface, particularly near the boiling point of water, resulting in a water contact angle of 147.5° ± 1.2°. This work established a method for preparing W/O monodispersed emulsions by direct emulsification of hydrophilic ceramic membranes at a temperature close to the boiling point of ***, it made high flux of membrane emulsification of monodispersed W/O emulsions possible,which satisfied the industrial requirements of fluidized catalytic cracking in the petrochemical industry.

关键词： Membrane emulsification Ceramic membrane Hydrophobic interface W/O emulsions

Chlorine-free emission disposal of spent acid etchant in a three-compartment ceramic membrane reactor

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Chinese Journal of Chemical Engineering 2020年第1期28卷 271-278页

作者： Fanglu Yuan Lele Cui Peipei Ding wenheng jing State Key Laboratory of Materials-Oriented Chemical Engineering National Engineering Research Center for Special Separation MembraneCollege of Chemical EngineeringNanjing Tech UniversityNanjing 211800China

Electrochemical technologies for the on-site treatment of spent acid etchant have received great attention due their ease of operation and economic benefits. On the other hand, a large amount of Cl2 is generated during the electrolysis process, which leads to potential environmental risks. In the present work, a novel threecompartment ceramic membrane flow reactor, including a cathode chamber, an anode chamber, and a gas absorption chamber was developed. The three chambers were divided by an Al2O3 ceramic membrane and a breathable hydrophobic anode diffusion electrode(ADE). The Cl2 evolution onset potential of the ADE was increased to 1.19 V from 1.05 V of the graphite felt, effectively inhibiting the chlorine evolution reaction(CER).The anode-generated Cl2 diffused into the gas absorption chamber through the ADE and was eventually consumed by the H2O2 adsorbent. Cu could be recovered without emitting chlorine due to the special structure of reactor. The current efficiency of copper precipitation and cathode reduction from Cu2+to Cu+reached 97.7%at a working current of 150 m A. These results indicated that the novel membrane reactor had high potential for application in the copper recovery industry.

关键词： Spent acid etchant Chlorine evolution reaction Anode diffusion electrode Three-compartment reactor Ceramic membrane

Magnéli phases TinO2n-1 as novel ozonation catalysts for effective mineralization of phenol

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Chinese Journal of Chemical Engineering 2018年第9期26卷 1978-1984页

作者： Xian Mao Fanglu Yuan Anqi Zhou wenheng jing State Key Laboratory of Materials-Oriented Chemical Engineering National Engineering Research Center for special Separation Membrane College of Chemical EngineeringNanjing Tech UniversityNanjing210009China

Magnéli phases TinO2n-1 have been demonstrated as promising environmentally friendly materials in advanced oxidation *** this study,Magnéli phases TinO2n-1 have been used as catalysts for the ozonation of phenol in aqueous solution for the first *** materials exhibited excellent catalytic ozonation activities both in phenol degradation and *** Ti4O7was added,the reaction rate was six-fold higher than that of with ozone alone,while the total organic carbon removal rate was substantially elevated from around 19.2%to 92%.By virtue of the good chemical stability of the materials,a low metal leaching of less than 0.15 mg·L^-1could effectively avoid the secondary pollution by metal *** quenching tests revealed·O2^-and ^1O2to be active oxygen species for phenol degradation at p H *** semiconductor catalysts,TinO2n-1 materials show electronic transfer *** adsorbed at B-acid sites of the catalyst surface can capture an electron from the conversion of Ti（Ⅲ）to Ti（Ⅳ）,and is thereby broken into the active oxygen *** was interesting to observe that TinO2n-1 exhibit better catalytic activity for phenol degradation and mineralization with lower n *** difference in electrical conductivity can be considered as a major factor for the catalytic *** highly conductive catalysts show a faster electron-transfer rate and better catalytic ***,significant evidences have been obtained for a single-electron-transfer mechanism of catalytic ozonation with Magnéli phases TinO2n-1.

关键词： TinO2n-1 Catalytic ozonation Conductivity B-acid sites Single-etectron-transfer

Synthesis of ordered mesoporous manganese titanium composite oxide catalyst for catalytic ozonation

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Chinese Journal of Chemical Engineering 2018年第9期26卷 1862-1872页

作者： Chaofei Fei Dan Li Xian Mao Yu Guo wenheng jing State Key Laboratory of Materials-Oriented Chemical Engineering Nanjing Tech University

In this account,highly ordered mesoporous MnO_x/TiO_2composite catalysts with efficient catalytic ozonation of phenol degradation were synthesized by the sol–gel *** surface morphology and properties of the catalysts were characterized by several analytical methods,including SEM,TEM,BET,XRD,FTIR,and ***,Mn doping was found to improve the degree of order,and the ordered mesoporous structure was optimized at 3%***,MnO_xwas highly dispersed in the ordered mesoporous materials to yield good catalytic ozonation *** could completely be degraded in 20 min and mineralized at 79%in 60 ***,the catalyst greatly improved the efficiency of degradation and mineralization of phenol when compared to single O_3or O_3+TiO_***,the reaction mechanism of the catalyst was discussed and found to conform to pseudo-first-order reaction dynamics.

关键词： Ordered mesoporous MnOx Catalytic ozonation Pseudo-first-order reaction

Preparation of Monodispersed O/W Emulsion by Ceramic External Membrane Emulsification System——Preliminary Study on Integrated Ceramic Membrane Emulsification Reactor

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Chinese Journal of Chemical Engineering 2004年第4期12卷 574-576页

作者：景文珩吴俊邢卫红徐南平 Membrane Science & Technology Research Center Key Laboratory of Material-oriented Chemical Engineering of Jiangsu Province Nanjing University of Technology Nanjing 210009 China Membrane Science & Technology Research Center Key Laboratory of Material-oriented Chemical Engineering of Jiangsu Province Nanjing University of Technology Nanjing 210009 China new reactor with integrated conventional slurry stirred reactor and ceramic external membrane emul-sification system was introduced in this paper. Toluene and toluene containing surfactant was separately used as dispersed phase for preparation of emulsions. Two kinds of emulsions were prepared and compared. The volume average sizes of prepared emulsions were 3.53 μm and 3.6μm respectively. The results showed that the droplet sizes of two kinds of emulsions were similar but the monodispersed emulsion was only obtained with addition of surfactant into the dispersed phase.

A new reactor with integrated conventional slurry stirred reactor and ceramic external membrane emulsification system, was introduced in this paper. Toluene and toluene containing surfactant was separately used as dispersed phase for preparation of emulsions. Two kinds of emulsions were prepared and compared. The volume average sizes of prepared emulsions were 3.53μm and 3.6μm respectively. The results showed that the droplet sizes of two kinds of emulsions were similar, but the monodispersed emulsion was only obtained with addition of surfactant into the dispersed phase.

关键词： membrane emulsification ceramic membrane emulsion

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气升式陶瓷膜过滤过程的气液两相流模拟

化工学报 2016年第6期67卷 2246-2254页

作者：林进沈浩景文珩南京工业大学材料化学工程国家重点实验室江苏南京210009

采用VOF双流体模型对19通道气升式陶瓷膜过滤装置进行气液两相流的流体动力学模拟,研究了曝气孔直径和曝气量对气升式陶瓷膜过滤装置的气含率、环流液速、膜面剪切力及膜管内湍流强度的影响,模拟结果与实验结果的误差在5%~10%之间。结... 详细信息

采用VOF双流体模型对19通道气升式陶瓷膜过滤装置进行气液两相流的流体动力学模拟,研究了曝气孔直径和曝气量对气升式陶瓷膜过滤装置的气含率、环流液速、膜面剪切力及膜管内湍流强度的影响,模拟结果与实验结果的误差在5%~10%之间。结果表明,气升管与降液管的气含率都随曝气量增大而增大,随曝气孔直径减小而增大;环流液速、膜面剪切力及膜管内的湍流强度都随曝气量增大先增大,当曝气量达到400 L·h-1时其增大趋势变缓。通过实验和模拟比较了3种不同孔径的曝气头,环流液速与曝气孔的直径关系不大,仅与曝气量相关,但曝气孔直径越小,其膜面剪切力越大,越有利于过滤过程的进行。

关键词：气升式陶瓷膜计算流体力学 VOF方法两相流模拟

Preparation of Macroporous TiO2 Ceramic Based on Membrane Jet-flow Emulsification

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Chinese Journal of Chemical Engineering 2007年第4期15卷 616-618页

作者：景文珩吴守红薛业建金万勤邢卫红徐南平 Membrane Science ＆ Technology Research Center Key Laboratory of Material-oriented Chemical Engineering ofJiangsu Province ＆MOE Nanjing University of Technology Nanjing 210009 China

A novel method to prepare macroporous TiO2 ceramic, based on membrane emulsification was *** solve the paradox between the instability of nonaqueous emulsion and long emulsification time required by themembrane emulsification, a two-stage ceramic membrane jet-flow emulsification .was. proposed. Discussion wasconducted on the evolution of droplet size with time, which followed the Ostwalcl npemng theory. And a monodispersed nonaqueous emulsion with an average droplet size of 1.6μm could beprepared. Using the emulsion, as atemplate, TiO2 ceramics with an average pore size ot 1.1 μm were obtaineed. Tne material could be prospectivelyused for preparation of catalysts, adsorbents, and membranes.

关键词： nonaqueous emulsion ceramic membrane emulsification jet-flow

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气升式陶瓷膜过滤装置处理油田含聚采出水

化工学报 2016年第9期67卷 3768-3775页

作者：沈浩张春陈超景文珩邢卫红南京工业大学材料化学工程国家重点实验室江苏南京210009 江苏久吾高科技股份有限公司江苏南京211808

采用新型的气升式陶瓷膜过滤系统处理油田含聚采出水,通过气液两相流替代单一的液相流动,降低了陶瓷膜处理油田含聚采出水过程的能耗,系统考察了曝气孔大小、曝气量和跨膜压差对膜渗透通量的影响。结果表明,采用孔径为微米级的曝气头曝... 详细信息

采用新型的气升式陶瓷膜过滤系统处理油田含聚采出水,通过气液两相流替代单一的液相流动,降低了陶瓷膜处理油田含聚采出水过程的能耗,系统考察了曝气孔大小、曝气量和跨膜压差对膜渗透通量的影响。结果表明,采用孔径为微米级的曝气头曝气使高压气体在多通道膜管内的分布更为均匀,进而有效抑制膜污染和浓差极化,延缓通量衰减。当曝气孔径为1μm时,渗透通量达到最大,且曝气量从300 L·h^(-1)增加到600 L·h^(-1)时,通量显著增加。此外,跨膜压差对膜的渗透通量影响显著,当跨膜压差为0.4 MPa时,渗透通量最佳。陶瓷膜处理油田采出水的出水水质各方面指标数据较为稳定,达到5.1.1回注水标准。最后,计算讨论了气升式陶瓷膜过滤装置的吨水能耗。

关键词：气升式膜油田采出水微孔曝气过滤