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Frontiers of Chemical Science and Engineering 2011年第3期5卷 330-338页

作者： Hong ZHU peiyong qin Beijing Key Laboratory of Bioprocess Beijing University of Chemical TechnologyBeijing 100029China

This study demonstrates a new Cellulose diacetate graft b-cyclodextrin(CDA-b-CD)copolymer asymmetric membrane prepared by a phase inversion technique for the separation of(–)-epigallocatechin-3-gallate(EGCG)from other polyphenols in crude *** graft copolymer,CDA-b-CD,was synthesized by pre-polymerization of cellulose diacetate(CDA)and 1,6-hexamethylene-diisocyanate(HDI),which was then grafted with b-cyclodextrin(b-CD).Surface and cross-section morphologies of the CDA-b-CD membranes were analyzed by using scanning electron microscopy(SEM).Fourier transform infrared spectroscopy(FT-IR)indicated that the b-CD was grafted onto the CDA by chemical *** inﬂuences of the HDI/CDA mass ratio and the catalyst mass fraction on the b-CD graft yield were *** optimum conditions of a HDI/CDA mass ratio of 0.35 g$g–1 and a catalyst mass fraction of 0.18 wt-%produced ab-CD graft yield of 26.51 wt-%.The effects of the b-CD graft yield and the concentration of the polymer cast solution on the separation of EGCG were also *** optimum conditions of a b-CD graft yield of 24.21 wt-%and a polymer concentration of 13 wt-%,the purity of EGCG increased from 26.51 to 86.91 wt-%.

关键词： (-)-epigallocatechin-3-gallate(EGCG) tea polyphenols CDA-β-CD

Environmental and economic assessment of vegetable oil production using membrane separation and vapor recompression

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Frontiers of Chemical Science and Engineering 2017年第2期11卷 166-176页

作者： Weibin Kong Qi Miao peiyong qin Jan Baeyens Tianwei Tan Beijing Key Lab of Bioprocess College of Life Science and Technology Beijing University of Chemical Technology Beijing 100029 China School of Engineering University of Warwick Coventry CV4 7AL UK

Solvent extraction of crude oil from oilseeds is widely applied for its high production capacity and low cost. In this process, solvent recovery and tail gas treatment are usually performed by adsorption, paraffin scrubbing, or even cryogenics （at low tail gas flow rates）. Membrane separation, which has a lower energy consumption than these techniques, spans a broad range of admissible concentrations and flow rates, and is moreover easily combined with other techniques. Vapor recompression has potentials to reduce the heat loss in association with distillation and evaporation. In this study, we proved the possibility of combining membrane separation and vapor recompression to improve the conventional vegetable oil production, by both experiments and process simulation. Nearly 73% of energy can be saved in the process of vegetable oil extraction by the novel processing approach. By further environmental assessment, several impact categories show that the optimized process is environmentally sustainable.

关键词： vegetable oil solvent-extraction membrane separation vapor recompression environmental and economic assessment

Facile biphasic catalytic process for conversion of monoterpenoids to tricyclic hydrocarbon biofuels

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Journal of Energy Chemistry 2020年第10期29卷 42-50页

作者： Shaoqu Xie Trong HHuynh peiyong qin Tianwei Tan Hongfei Lin The Gene and Linda Voiland School of Chemical Engineering and Bioengineering Washington State UniversityPullmanWA 99164 National Energy Research and Development Center for Biorefinery Beijing University of Chemical TechnologyBeijing 100029China

Terpenoids have drawn much attention to scientists in synthesizing high-performance bio-jet fuels due to their ring structures,which feature potential high ***,a facile biphasic catalytic process has been developed for the production of high-density tricyclic hydrocarbon biofuels from a monoterpenoid,1,8-cineole,using sulfuric acid(H2SO4)as the homogeneous catalyst.A^100%conversion of 1,8-cineole and a>40%carbon yield of cyclic dimers were achieved at 100℃within two *** mechanism for the acid-catalyzed conversion of 1,8-cineole to cyclic hydrocarbon dimers were *** particular,the formation of the diene intermediates and the following dimerization of dienes was essential to synthesize tricyclic terpene *** biphasic catalytic process accelerated the deoxygenation rate and enabled the dimerization with the aid of organic solvent while controlling the reaction rates to avoid the formation of solid ***,this process also facilitated the product separation by organic solvent extraction while enabling easy recycle of the homogenous catalysts.

关键词： Cineole High-density biofuels Biphasic catalytic process Diels-Alder reaction Dehydration

Study on the microwave-assisted extraction of polyphenols from tea

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Frontiers of Chemical Science and Engineering 2010年第3期4卷 307-313页

作者： Liyun WANG peiyong qin Yan HU Laboratory of Bioprocess of Beijing Beijing University of Chemical TechnologyBeijing 100029China

This study demonstrated a promising method for quickly extracting tea polyphenol(TP)by microwaveassisted extraction(MAE)*** influential parameters,including MAE temperature,microwave power,concentration of extraction solvent,MAE time and the solid/liquid ratio,were *** optimum condition of MAE was obtained by dual extraction with 60%ethanol(v/v)and the solid/liquid ratio 1:12 g/mL at 80℃ for 10 minutes under the microwave power *** yield of TP was 96.5%under the described *** with traditional methods,including hot reflux extraction(HRE),ultrasound-assisted extraction(UAE)and supercritical fluid extraction(SFE),the extraction time was saved 8 times than that of HRE,and the yield was increased by 17.5%.The extraction time at comparable levels of production was saved 2 times,and the energy consumption was one fourth that of *** extraction time was saved 5 times than that of SFE,and the yield of TP was increased by 40%.Moreover,compared with MAE of TP studied by others,it decreased the solid/liquid ratio from 1∶20 to 1∶12 g/mL without 90-min pre-leaching time,and the yield of TP was increased by 6%-40%.

关键词： microwave-assisted extraction tea polyphenols

Ultrathin polyamide nanofiltration membrane prepared by triazine-based porous organic polymer as interlayer for dye removal

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Chinese Journal of Chemical Engineering 2023年第5期57卷 193-201页

作者： Yongbo Liu Zhihao Si Cong Ren Hanzhu Wu Peng Zhan Yuqing Peng peiyong qin National Energy R&D Center for Biorefinery Beijing University of Chemical TechnologyBeijing 100029China College of Life Science and Technology Beijing University of Chemical TechnologyBeijing 100029China Beijing Key Laboratory of Membrane Science and Technology College of ChemicalEngineeringBeijing University of Chemical TechnologyBeijing 100029China

Separation membrane with high flux is generally encouraged in industrial application,because of the tremendous needs for decreasing membrane areas,usage costs and space *** most effective and direct method for obtaining the high flux is to decrease membrane ***(PA)nanofiltration membrane is conventionally prepared by the direct interfacial polymerization(IP)on substrate surface,and results in a thick PA *** this work,we proposed a strategy that constructing triazine-based porous organic polymer(TRZ-POP)as the interlayer to prepare the ultrathin PA nanofiltration ***-POP is firstly deposited on the polyethersulfone substrate,and then the formed TRZ-POP provides more adhesion sites towards PA based on its high specific surface *** chemical bonding between terminal amine group of TRZ-POP and the amide group of PA further improves the binding force,and strengthens the stability of PA *** importantly,the high porosity of TRZPOP layer causes the higher polymerization of initial PA owning to the stored sufficient amino monomer;and H-bonding interaction between amine groups of TRZ-POP and piperazine(PIP)can astrict the release of ***,IP process is controlled,and the thinnest thickness of prepared PA layer is only<15 *** expected,PA/TRZ-POP membrane shows a more excellent water flux of 1414 L·m^(-2)·h^(-1)·MPa^(-1)than that of the state-of-the-art nanofiltration membranes,and without sacrificing dye *** build of TRZPOP interlayer develops a new method for obtaining a high-flux nanofiltration membrane.

关键词： Polyamide Nanofiltration Interfacial polymerization Triazine-based porous organic polymer

Anion exchange membranes with a semi-interpenetrating polymer network using 1,6-dibromohexane as bifunctional crosslinker

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Chinese Journal of Chemical Engineering 2024年第8期72卷 199-208页

作者： Aijie Li Zhanliang Wang Zhihao Si Lu Lu Peipei Huang Jinhong Liu Songyuan Yao peiyong qin Xinmiao Zhang National Energy R&D Center for Biorefinery College of Life Science and TechnologyBeijing University of Chemical TechnologyBeijing 100029China Paris Curie Engineer School Beijing University of Chemical TechnologyBeijing 100029China Environmental Protection Research Institute Beijing Research Institute of Chemical IndustryBeijing 100000China

An anion exchange membrane(AEM)is generally expected to possess high ion exchange capacity(IEC),low water uptake(WU),and high mechanical strength when applied to electrodialysis *** different types of AEMs,semi-interpenetrating polymer networks(SIPNs)have been suggested for their structural superiorities,i.e.,the tunable local density of ion exchange groups for IEC and the restrained leaching of hygroscopic groups by insolubility for ***,the conventional SIPN AEMs still struggle to balances IEC,WU,and mechanical strength simultaneously,due to the lack of the compact crosslinking *** this work,we proposed a novel SIPN structure of polyvinylidene difluoride/polyvinylimidazole/1,6-dibromohexane(PVDF/PVIm/DBH).On the one hand,DBH with two cationic groups of imidazole groups are introduced to enhance the ion conductivity,which is different from the conventional monofunctional modifier with only one cationic *** the other hand,DBH has the ability to bridge with PVIm,where the mechanical strength of the resulting AEM is increased by the increase of crosslinking *** show that a low WU of 38.1%to 62.6%,high IEC of 2.12—2.22 mmol·g^(-1),and excellent tensile strength of 3.54—12.35 MPa for PVDF/PVIm/DBH membrane are *** work opens a new avenue for achieving the high-quality AEMs.

关键词： Anion exchange membrane Polyvinylidene difluoride Electrodialysis Semi-interpenetrating polymer networks

2,5-Diformylfuran production by photocatalytic selective oxidation of 5-hydroxymethylfurfural in water using MoS_(2)/CdIn_(2)S_(4) flower-like heterojunctions

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Chinese Journal of Chemical Engineering 2023年第2期54卷 180-191页

作者： Qian Zhu Yan Zhuang Hongqing Zhao Peng Zhan Cong Ren Changsheng Su Wenqiang Ren Jiawen Zhang Di Cai peiyong qin National Energy R&D Center for Biorefinery Beijing University of Chemical TechnologyBeijing 100029China Collage of Life Science and Technology Beijing University of Chemical TechnologyBeijing 100029China Research Center for Eco-environmental Sciences Chinese Academy of ScienceBeijing 100085China

The selective oxidation of 5-hydroxymethylfurfural(HMF) into 2,5-diformylfuran(DFF) is an important reaction for renewable biomass building blocks. Compared with thermal catalytic processes, photocatalytic production of DFF from HMF has attracted tremendous attention. Herein, the MoS_(2)/CdIn_(2)S_(4)(MC)flower-like heterojunctions were prepared and considered as photocatalysts for selective oxidation of HMF into DFF under visible-light irradiation in aqueous solution. Results demonstrated MoS_(2) in MC heterojunction could promote the separation of photoexcited electron-hole pairs, while the amount of MoS_(2) dropping was proved influenced on the photocatalytic performance. 80.93% of DFF selectivity was realized when using 12.5% MC as photocatalyst. In addition, the MC catalyst also showed great potential in transformation of other biomass derived benzyl-and furyl-alcohols. The catalytic mechanism suggested that ·O_(2)^(-) was the decisive active radical for HMF oxidation. Therefore, the MC heterojunction could be applied in photocatalytic conversion of biomass to valuable chemicals under ambient condition.

关键词： 2 5-Diformylfuran(DFF) Photocatalysis MoS_(2)/CdIn_(2)S_(4)(MC) Selective oxidation Visible light irradiation

Hierarchical ZnIn2S4 microspheres as photocatalyst for boosting the selective biohydrogenation of furfural into furfuryl alcohol under visible light irradiation

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Green Chemical Engineering 2022年第4期3卷 385-394页

作者： Hongqing Zhao Qian Zhu Yan Zhuang Peng Zhan Yanou Qi Wenqiang Ren Zhihao Si Di Cai Senshen Yu peiyong qin National Energy R&D Center for Biorefinery Beijing University of Chemical TechnologyBeijing100029China School of International Education Beijing University of Chemical TechnologyBeijing100029China Research Center for Eco-environmental Sciences Chinese Academy of ScienceBeijing100085China R&D Center Yunnan Yuntianhua Co.Ltd.No.1417th Dianchi Road650000KunmingChina College of Life Science and Technology Beijing University of Chemical TechnologyBeijing100029China

Photocatalyst-enzyme coupling process for visible light driven biotransformation holds promise in producing solar *** this work,aiming to produce furfuryl alcohol,the important bulk chemical that is typically derived from renewable lignocellulose,a highly selective furfural hydrogenation process is proposed by coordinating the alcohol dehydrogenase with the ZnIn2S4 assistant reduced form of nicotinamide adenine dinucleotid(NADH)*** indicated that under visible light irradiation,the hierarchical ZnIn2S4 microspheres exhibited excellent holes and electrons separating efficiency,affording to high NADH regeneration(yield of 90.2±3.28%).When adopting the photo-biocoupled reduction process in furfural transformation,a furfuryl alcohol yield of 79.4±1.95%was achieved under the optimized *** photocatalyst-enzyme coupling process also showed good stability,exceeding 70%of catalytic activity was reserved after reusing the catalysts for 10 *** novel photo-biocoupled system showed promising in extending to the highly selective hydrogenation of other biochemicals from lignocelluloses.

关键词： NADH regeneration Photobiocatalysis Furfural Furfuryl alcohol Selective hydrogenation

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布洛芬手性拆分分子印迹复合膜的制备与表征

北京化工大学学报（自然科学版） 2013年第1期40卷 5-9页

作者：赵潇秦培勇北京化工大学生命科学与技术学院北京100029

以接枝环糊精的醋酸纤维素复合物为铸膜材料,S-布洛芬为印迹分子,采用相转化法制备了用于手性分离的分子印迹膜;用FT-IR和SEM测试手段对膜的化学组成和结构形态进行了表征;通过渗透实验考察了该分子印迹膜对外消旋布洛芬的手性拆分性能... 详细信息

以接枝环糊精的醋酸纤维素复合物为铸膜材料,S-布洛芬为印迹分子,采用相转化法制备了用于手性分离的分子印迹膜;用FT-IR和SEM测试手段对膜的化学组成和结构形态进行了表征;通过渗透实验考察了该分子印迹膜对外消旋布洛芬的手性拆分性能。结果表明在β-环糊精接枝率为29.01%(质量分数),模板分子浓度比为1∶10,铸膜液质量分数为12.5%的条件下,分子印迹膜对右旋布洛芬的分离因子可达2.09。

关键词： β-环糊精醋酸纤维素分子印迹膜布洛芬手性拆分

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生物乙醇原位分离技术的研究进展

化工进展 2022年第3期41卷 1318-1329页

作者：吴涵竹司志豪秦培勇北京化工大学生命科学与技术学院北京100029

生物乙醇是一种重要的可再生生物燃料,使用生物乙醇可大幅减少温室气体排放。为了建立更高效低能耗的生物乙醇回收工艺,原位分离(ISPR)技术应运而生。本文综述了近年来乙醇原位分离的研究进展,从原理及应用等进行多方面详细地介绍,包括... 详细信息

生物乙醇是一种重要的可再生生物燃料,使用生物乙醇可大幅减少温室气体排放。为了建立更高效低能耗的生物乙醇回收工艺,原位分离(ISPR)技术应运而生。本文综述了近年来乙醇原位分离的研究进展,从原理及应用等进行多方面详细地介绍,包括气提、真空发酵、吸附、液-液萃取、渗透汽化、膜蒸馏等分离技术。针对分离性能、能耗成本等问题分析了不同分离技术耦合发酵过程的优势及不足,重点回顾了以渗透汽化为代表的膜分离技术,总结了渗透汽化膜材料的选择以及膜的制备方法,旨在提升乙醇分离膜性能优化乙醇分离工艺。为整合不同分离技术的特点及优势,聚焦多级耦合分离系统的开发对各级分离技术联用的性能及潜力进行剖析与评价,并在此基础上研判其发展前景。

关键词：生物乙醇原位分离技术发酵过程耦合分离