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adsorption selectivity of salicylic acid and 5-sulfosalicylic acid onto hypercrosslinked polymeric adsorbents

Frontiers of Environmental Science & Engineering 2007年第1期1卷 73-78页

作者： LIU Fuqiang XIA Mingfang FEI Zhenghao CHEN Jinlong LI Aimin State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210093China Research Institute of Environmental Sciences of Jiangsu Province Nanjing 210036China Jiangsu Provincial Key Laboratory of Coastal Wetland Bioresources and Environmental Protection Department of Chemistry of Yancheng Teachers CollegeYancheng 224002China

Both bottle-point and column-feeding experi-ments involving different solutes and sorbents were carried out to investigate the adsorption selectivity and separation performance of salicylic acid and 5-sulfosalicylic acid.Their adsorption isotherms onto such hypercrosslinked polymeric adsorbents as NDA-100 and NDA-99 could be well described by the Freundlich equations whose characteristics describe extrathermic and favorable adsorption processes.The adsorp-tion towards NDA-100 mainly depended on the p-p interac-tion,while that towards NDA-99 was extremely influenced by the static-electric interaction.Additionally,the adsorptive capacity of salicylic acid on NDA-99 decreased while it increased on NDA-100 with the presence of 5-sulfosalicylic acid in the adsorptive environment as the competitive component.Comparatively,the adsorption capacity of 5-sulfosalicylic acid decreased on both resins with salicylic acid as the competitive component.In fact,the difference in the interaction between adsorbent and adsorbate resulted in the straight antagonism on the effective adsorption sites on the adsorbent.In conclusion,the adsorption selectivity of salicylic acid onto NDA-100 was obviously larger than that onto NDA-99 with the existence of 5-sulfosalicylic acid in the adsorptive environment.A satisfactory separation and recovery of tested solutes in aqueous phase could be foresee-ably achieved by the sequencing adsorption technique involving NDA-100 as well as NDA-99.

关键词： salicylic acid 5-sulfosalicylic acid hyper-crosslinked polymeric adsorbent adsorption selectivity sequencing adsorption technique

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Fabrication of nickel oxide functionalized zeolite USY composite as a promising adsorbent for CO_(2) capture

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Chinese Journal of Chemical Engineering 2022年第6期35卷 207-213页

作者： Jipeng Dong Fei Wang Guanghui Chen Shougui Wang Cailin Ji Fei Gao Shandong Key Laboratory of Multiphase Fluid Reaction and Separation Engineering College of Chemical EngineeringQingdao University of Science and TechnologyQingdao 266042China Department of Chemical Engineering Qingdao University of Science and TechnologyGaomi 261500China

adsorption process is considered to be the most promising alternative for the CO_(2) capture to the traditional energy-intensive amine absorption process,and the development of feasible and efficient CO_(2) adsorbents is still a challenge.In this work,the NiO@USY(ultrastable Y)composites with different NiO loadings were prepared for the CO_(2) adsorption using Ni(NO_(3))_(2) as the precursor.The composites were characterized by X-ray photoelectron spectroscopy,X-ray diffraction,nitrogen adsorption–desorption test,scanning electron microscopy analysis,and thermogravimetric analysis,and were evaluated for the CO_(2) adsorption capacity,CO_(2)/N2 adsorption selectivity and CO_(2) cycle adsorption capacity.The characterization results show that after the activation at 423 K,the Ni(NO_(3))_(2) species were well dispersed into the surface of zeolite USY,and after the further activation at 823 K,Ni(NO_(3))_(2) could be converted into highly dispersed NiO.The adsorption results show that the presence of the active component NiO plays an important role in improving the CO_(2) adsorption performance,and the NiO@USY composite with a NiO loading of 1.5 mmol·g^(-1) USY support displays a high adsorption capacity and adsorption selectivity for CO_(2),and shows a good cycle stability.In addition,the Clausius–Clapeyron equation was used to evaluate the isosteric heat of adsorption of CO_(2) on the NiO(1.5)@USY composite,and the heat of adsorption was 17.39–38.34 kJ·mol^(-1).

关键词： NiO@USY composites Carbon dioxide adsorption Separation adsorption selectivity

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Synthesis and Evaluation of Microporous Metal Organic Frameworks for Light Hydrocarbon adsorption

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China Petroleum Processing & Petrochemical Technology 2022年第4期24卷 120-128页

作者： Wen Guilin Li Ying Li Jianzhe Li Qingrun Zhang Hongxing Xiao Anshan Tao Bin State Key Laboratory of Safety and Control for Chemicals SINOPEC Research Institute of Safety Engineering Co.Ltd.Qingdao 266101China

Five microporous MOFs were synthesized and their static adsorption properties for light hydrocarbons were experimentally investigated at 298 K and 150 kPa.Among the five MOFs,HKUST-1 and Ni(bdc)(ted)0.5 exhibited much higher uptakes of ethane and propane than PCN-250,UiO-66,and ZIF-8.Breakthrough experiments were carried out at 298 K and atmospheric pressure on HKUST-1 and two commercially used adsorbents.HKUST-1 exhibited a much lower dynamic than static adsorption capacity.Moreover,HKUST-1 and the two traditional adsorbents could effectively separate binary(ethane/propane)and ternary(ethane/propane/toluene)mixtures.

关键词： light hydrocarbons metal-organic frameworks adsorption breakthrough curve adsorption selectivity

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THE COORDINATION adsorption OF AMINES ON CARBOXYL RESIN IN Cu^(2+) FORM FROM NON-AQUEOUS MEDIUM AND DESORPTION WITH ANHYDROUS ELUANT

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Chinese Journal of Polymer Science 2002年第5期20卷 439-444页

作者： Jia-zheng Li Zuo-qing Shi Yun-ge Fan The State Key Laboratory of Functional Polymer Materials for adsorption and Separation, Institute of Polymer Chemistry Nankai University, Tianjin 300071, China College of Chemical Engineering Hebei University of Technology Tianjin 300130 China Polymer Materials for adsorption and Separation Institute of Polymer Chemistry Nankai University 天津 300071

The adsorption of aniline, N-methylaniline and N,N-dimethylaniline onto carboxyl resin in Cu2+ form from water, ethanol and n-hexane have been studied. The results show that the adsorption affinities from n-hexane are higher than that from water, and nearly zero from ethanol. The separation factors for the adsorption of these three amines from mixed solution were also examined. The results of continuous column operations show that the breakthrough capacity of aniline from n-hexane reaches 90 mg/g dry resin in Cu2+ form, and the amines adsorbed can be stripped with anhydrous ethanol effectively. adsorption onto carboxyl resin in Cu2+ form from non-aqueous medium and desorption with anhydrous eluant can overcome the run-off of Cu2+ from the resin, and would show potential advantages in the separation of some water-insoluble natural products.

关键词： coordination adsorption adsorption selectivity amine ligand

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