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Nano Research 2017年第10期10卷 3543-3556页

作者： Yunhong Pi Xiyi Li qibin xia Junliang Wu Zhong Li Yingwei Li Jing xiao School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510640 China Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control South China University of Technology Guangzhou 510640 China

Efficient separation and transfer of photogenerated electron/hole as well as enhanced visible light absorption play essential roles in photocatalytic reactions. To promote the photocatalytic reduction of Cr（VI）, a toxic heavy metal ion, multiwalled carbon nanotube （MWCNT） was introduced as an electron acceptor into NH2-MIL-68（In）. This led to the growth of a willow leaf-like metal-organic framework （MOF） on an MWCNT backbone forming MWCNT/NH2-MIL-68（In）（PL-1）, which showed a highly efficient transfer of photogenerated carriers. Moreover, MWCNT incorporation introduced more mesopores for Cr（VI） diffusion and enhanced the visible light adsorption without lowering the conduction band position. As a result, the photocatalytic kinetic constant of PL-1 was found to be almost three times higher than that of the parent NH2-MIL-68（In）. Thus, growing MOFs on MWCNTs provides a facile and promising solution for effective remediation of environmental pollution by utilizing solar energy. This work provides the first example of using MWCNT/MOF composites for photocatalytic reactions.

关键词： NH2-MIL-68(In) multiwalled carbon nanotube (MWCNT) photocatalytic reduction Cr(VI)

Effect of textural property of coconut shell-based activated carbon on desorption activation energy of benzothiophene

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Frontiers of Chemical Science and Engineering 2008年第3期2卷 269-275页

作者： Moxin YU Zhong LI Hongxia XI qibin xia Shuwen WANG College of Chemical and Energy Engineering South China University of TechnologyThe Key Laboratory of Enhanced Heat Transfer and Energy ConversationMinistry of EducationGuangzhou 510640China

In this work,the effect of the textural property of activated carbons on desorption activation energy and adsorption capacity for benzothiophene(BT)was *** surface areas and the textural parameters of three kinds of the activated carbons,namely SY-6,SY-13 and SY-19,were measured with an ASAP 2010 *** desorption activation energies of BT on the activated carbons were determined by temperature-programmed desorption(TPD).Static adsorption experiments were carried out to determine the isotherms of BT on the activated *** influence of the textural property of the activated carbons on desorption activation energy and the adsorption capacity for BT was *** showed that the BET surface areas of the activated carbons,SY-6,SY-13 and SY-19 were 1106,1070 and 689 m2·g^(-1),respectively,and their average pore diameters were 1.96,2.58 and 2.16 nm,*** TPD results indicated that the desorption activation energy of BT on the activated carbons,SY-6,SY-19 and SY-13 were 58.84,53.02 and 42.57 KJ/mol,*** isotherms showed that the amount of BT adsorbed on the activated carbons followed the order of SY-6>SY-19>*** smaller the average pore diameter of the activated carbon,the stronger its adsorption for BT and the higher the activation energy required for BT desorption on its *** Freundlich adsorption isotherm model can be properly used to formulate the adsorption behavior of BT on the activated carbons.

关键词： activated carbon benzothiophene desorption activation energy average pore diameter adsorption equilibrium

Catalytic adsorptive desulfurization of mercaptan,sulfide and disulfide using bifunctional Ti-based adsorbent for ultra-clean oil

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Chinese Journal of Chemical Engineering 2022年第2期35卷 25-34页

作者： Cuiting Yang Bowen Wu Zewei Liu Guang Miao qibin xia Zhong Li Michael J.Janik Guoqing Li Jing xiao School of Chemistry and Chemical Engineering South China University of TechnologyGuangzhou 510640China Department of Chemical Engineering Pennsylvania State UniversityPA 16802USA

Ultra-deep desulfurization of transformer oil is of great demand among power *** this work,the effective and deep removal of various types of organosulfurs,including mercaptan,sulfide and disulfide via catalytic adsorptive desulfurization(CADS)using bifunctional Ti-based adsorbent is *** to adsorptive desulfurization(ADS),dramatically improvement of the organosulfur uptakes were achieved under CADS *** equilibrium adsorption capacity at 5 μg∙g^(-1) S reached up to 15.7,33.4,11.6 and 11.9 mg∙g^(-1) for propyl mercaptan(n-PM),dimethyl sulfide(DMS),di-t-butyl disulfide(DTBDS)and dibenzyl disulfide(DBDS),which was 262,477,97 and 128 times to that of ADS process,respectively,and was the highest among the reported desulfurization ***,it achieved superior breakthrough capacity of 2050,530 and 210 ml F·(g A)^(-1) at the breakthrough S concentration of 1 μg∙g^(-1) of the commercial transformer oil S containing 10,50 and 150 μg∙g^(-1),*** effectiveness of CADS is associated to the transformation of sulfur species to higher polar sulfonic species with the assistance of mild oxidant,which can be readily captured by silanol groups on SiO2 through Hbonding *** excellent recyclability of the adsorbent can be realized through solvent washing or oxidative air *** work provides an effective and economic approach for the elimination of trace amount of mercaptan,sulfide and disulfide from transformer oil.

关键词： Adsorption Catalysis Selectivity Ultra-deep desulfurization Transformer oil

Highly selective separation of propylene/propane mixture on cost-effectively four-carbon linkers based metal-organic frameworks

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Chinese Journal of Chemical Engineering 2022年第11期51卷 126-134页

作者： Daofei Lv Junhao Xu Pingjun Zhou Shi Tu Feng Xu Jian Yan Hongxia Xi Zewei Liu Wenbing Yuan Qiang Fu Xin Chen qibin xia School of Environmental and Chemical Engineering Foshan UniversityFoshan 528000China School of Chemistry and Chemical Engineering South China University of TechnologyGuangzhou 510641China Sichuan Jinyuansheng New Energy Technology Co. LtdMeishan 620010China

The separation of propylene and propane is an important but challenging process,primarily achieved through energy-intensive distillation technology in the petrochemical ***,we reported two natural C4linkers based metal–organic frameworks(MIP-202 and MIP-203)for C_(3)H_(6)/C_(3)H_(8)*** isotherms and selectivity calculations were performed to study the adsorption performance for C_(3)H_(6)/C_(3)H_(8)*** show that C_(3)H_(6)/C_(3)H_(8)uptake ratios(298 K,100 kPa)for MIP-202 and MIP-203 are 2.34 and 7.4,respectively.C_(3)H_(6)/C_(3)H_(8)uptake ratio(303 K,100 k Pa)for MIP-203 is up *** mechanism for enhanced separation performance of C_(3)H_(6)/C_(3)H_(8)on MIP-203 at higher temperature(303 K)was revealed by the in situ PXRD *** adsorption selectivities of C_(3)H_(6)/C_(3)H_(8)on MIP-202 and MIP-203(298 K,100 k Pa)are 8.8 and 551.4,*** mechanism for the preferential adsorption of C_(3)H_(6)over C_(3)H_(8)in MIP-202 and MIP-203 was revealed by the Monte Carlo *** cost of organic ligands for MIP-202 and MIP-203 was lower than that of organic ligands for those top-performance *** work sets a new benchmark for C_(3)H_(6)sorbents with high adsorption selectivities.

关键词： Propylene Propane Separation Gas Adsorption Metal-organic frameworks

牛磺酸和甘氨酸在D290树脂上的离子交换平衡

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离子交换与吸附 2007年第2期23卷 144-150页

作者：宋峰李忠夏启斌华南理工大学化工与能源学院广州510640 华南理工大学化工与能源学院

研究了牛磺酸与甘氨酸在阴离子树脂D290上的离子交换平衡。采用静态法分别进行牛磺酸/氢氧根/D290树脂和甘氨酸/氢氧根/D290树脂体系的离子交换平衡实验并测定等温线;在不同的离子强度下进行了牛磺酸/甘氨酸/氢氧根/D290阴离子交换树脂... 详细信息

研究了牛磺酸与甘氨酸在阴离子树脂D290上的离子交换平衡。采用静态法分别进行牛磺酸/氢氧根/D290树脂和甘氨酸/氢氧根/D290树脂体系的离子交换平衡实验并测定等温线;在不同的离子强度下进行了牛磺酸/甘氨酸/氢氧根/D290阴离子交换树脂体系的离子交换平衡实验,测定牛磺酸和甘氨酸在碱性条件下的竞争交换平衡等温线。实验结果表明,牛磺酸在D290阴离子交换树脂上的交换量大于甘氨酸的交换量,阴离子交换树脂对牛磺酸和甘氨酸的选择性系数分别为STau-,OH-=2.55,SGly-,OH-=1.65。在牛磺酸/甘氨酸/氢氧根/D290树脂体系中,D290树脂对牛磺酸/甘氨酸/氢氧根3种离子的选择性从高到底顺序是:牛磺酸>甘氨酸>氢氧根。树脂对牛磺酸的选择性要大于对甘氨酸的选择性。随着溶液中离子强度的增大,树脂对牛磺酸与甘氨酸之间的选择性下降。

关键词：牛磺酸甘氨酸离子强度阴离子树脂竞争交换平衡

INVESTIGATION OF THE INTERACTIONS BETWEEN WATER AND MODIFIED SILICA GEL BY IGC AND TPD

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Chinese Journal of Reactive Polymers 2006年第1期15卷 1-12页

作者： LI Xin LI Zhong xia qibin XI Hongxia The Key Lab of Enhanced Heat Transfer and Energy Conservation College of Chemical Engineering and Energy South China University of Technology Guangzhou 510640 China

In this work, the thermodynamic parameters for the adsorption of water vapor on untreated silica gel and silica gel treated with hygroscopic salts and silane coupling agent were determined by lnverse Gas Chromatography （IGC） in the infinite dilution region. The desorption activation energies of the water vapor on virgin and modified silica gels were estimated by using the Temperature Programmed Desorption （TPD） technique. The interactions between the water and the virgin and modified silica gels were discussed. Results showed that the thermodynamic parameters and desorption activation energy of water vapour on the silica gels increase with decreasing pore size and increasing the surface hydrophilic properties. The desorption activation energy of virgin and modified silica gels was found to increase with increasing the thermodynamic parameters. The larger the adsorption parameters and the desorption activation energy were, the interactions between water and virgin and modified silica gels were.

关键词： Silica gel Pore size Surface chemistry Desorption activation energy Thermodynamic parameters

PREPARATION OF CUOγ-Al_2O_3 CATALYSTS FOR CATALYTIC COMBUSTION VOCS VIA PLASMA

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Chinese Journal of Reactive Polymers 2005年第1期14卷 14-21页

作者： GUO Jianguang LI Zhong XI Hongxia xia qibin Research Institute of Chemical Engineering South China University of Technology Guangzhou 510640 China

CuOγ-Al2O3 catalysts were prepared by plasma treatment and conventional impregnation methods. The catalytic combustion of two kinds of volatile organic compounds (VOCs), toluene and benzene, were carried out over these CuOγ-Al2O3 catalysts. The surface properties of these catalysts were characterized by X-ray Diffraction (XRD) and Scanning Electron Microscopy (SEM). The experimental results showed that in catalytic combustion the activity of the CuOγ-Al2O3 catalyst prepared via plasma was much higher than that of the CuOγ-Al2O3 catalyst prepared by conventional impregnation method. XRD results showed that an enhanced dispersion had been achieved with the plasma treatment. SEM results indicated that the size became much smaller and the surface became more uniform with the plasma treatment.

关键词： Plasma Catalyst Catalytic combustion Volatile organic compounds.

THE EFFECT OF IONIC STRENGTH ON THE UPTAKE OF TAURINE ON A STRONG-BASIC ANION EXCHANGE RESIN

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Chinese Journal of Reactive Polymers 2005年第1期14卷 22-27页

作者： SONG Feng LI Zhong XI Hongxia xia qibin FU Kan Research Institute of Chemical Engineering South China University of Technology Guangzhou 510640 China

Studied the effect of ionic strength on the uptake of taurine on a strong-basic anion exchange resin The batch phase equilibrium experiments of taurine on the anion exchange resin D290 were conducted at different ionic strength, and then the amounts of uptake of taurine on the resin at different pH were determined. The ion exchange mechanisms of taurine on the anion exchange resin at different pH were discussed. Experimental results showed that with increase of the ionic strength of solution, the adsorbed amount of taurine on the resin D290 decreased; Adding small amounts of NaOH or HCl into the system of taurine aqueous solution/D290 anion resin would nfake the amount of taurine taken up on the resin to decrease due to the competition uptakes of hydroxyl ion with taurine or the decrease in the amount of absorbable zwitterions of taurine in the solution and excluding the cations of taurine from the anion resin.

关键词： Taurine pH Equilibrium Anion Exchange Resin

A NEW MODEL FOR ESTIMATION OF DIFFUSION COEFFICIENT OF PHENOL DESORPTION WITHIN POLYMERIC RESIN UNDER ULTRASOUND

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Chinese Journal of Reactive Polymers 2002年第1期11卷 1-10页

作者： LI xiangbin ZHAO Yuechun xia qibin XI Hongxia LI Zhong Research Institute ofChemical Engineering South China University of Technology Guangzhou 510640P.R.China College of Science South China Agricultural UniversityGuangzhou 510642China

A new model, phase equilibrium-kinetics model (PEKM), for estimation of diffusion coefficient was proposed in this paper. Kinetic experiments of phenol desorption on NKAII resin in the presence and the absence of ultrasound were separately conducted, and diffusion coefficients of phenol within an adsorbent particle were estimated by means of proposed PEKM and classic simplified model. Results show that the use of ultrasound not only changes the phase equilibrium state of NKA II resin/phenol/water system which had been equilibrium at normal condition, but also enhances diffusion of phenol within the resin. The diffusion coefficient of phenol in the resin in the field of ultrasound increases in an order of magnitude in comparison with the diffusion coefficient determined under no ultrasound. Experimental results also indicated that the diffusion coefficients estimated by PEKM were more accurate than that estimated by the classic simplified model.

关键词： Ultrasound Diffusion coefficient PEKM Classic simplified model Phenol Desorption NKAII resin

活性炭表面负载金属离子对其吸附苯并噻吩的影响

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化工学报 2006年第8期57卷 1943-1948页

作者：余谟鑫李忠夏启斌奚红霞华南理工大学传热强化与过程节能教育部重点实验室广东广州510640

主要研究了活性炭表面负载不同的金属离子对其吸附苯并噻吩的影响.通过浸渍法分别将6种不同的过渡金属离子负载在活性炭表面上,用静态吸附法测定了苯并噻吩硫化物在改性活性炭上的吸附等温线,应用软硬酸碱理论分析和讨论了其吸附能力的... 详细信息

主要研究了活性炭表面负载不同的金属离子对其吸附苯并噻吩的影响.通过浸渍法分别将6种不同的过渡金属离子负载在活性炭表面上,用静态吸附法测定了苯并噻吩硫化物在改性活性炭上的吸附等温线,应用软硬酸碱理论分析和讨论了其吸附能力的差异.结果表明,活性炭表面负载Ag+、Ni2+、Cu2+或Zn2+离子,可提高活性炭吸附苯并噻吩硫化物的能力,而活性炭表面负载Fe3+或Co3+离子,反而降低了活性炭吸附苯并噻吩硫化物的能力,这主要是活性炭表面的酸碱性质发生变化.采用密度泛函数理论法计算结果表明,苯并噻吩的电负性χ为2.638,属软碱类物质;由于Ag+为软酸,活性炭负载Ag+离子,增加了其局部表面的软酸,从而增强了对苯并噻吩硫化物的吸附;由于Ni2+、Cu2+和Zn2+离子属交界酸,负载Ni2+、Cu2+、Zn2+离子增加了活性炭表面的交界酸,也在一定程度上提高了其表面对苯并噻吩硫化物的吸附;当活性炭表面负载了硬酸性Fe3+或Co3+离子,其局部表面硬酸增大从而降低了其对苯并噻吩的吸附.

关键词：活性炭苯并噻吩金属离子吸附软硬酸碱理论