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Coalescence separation of oil water emulsion on amphiphobic fluorocarbon polymer and silica nanoparticles coated fiber-bed coalescer

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Chinese Journal of Chemical Engineering 2021年第8期34卷 29-37页

作者： Qian Zhang Lei li lixia Cao Yanxiang li wangliang li CAS Key Laboratory of Green Process and Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Innovation Academy for Green Manufacture Chinese Academy of SciencesBeijing 100190China

Discharging untreated oily wastewater into the environment disrupts the ecological balance,which is a global problem that requires urgent *** and superoleophilic fibrous medium(FM)effectively separated oil–water emulsion as it was hydrophobic *** its separation efficiencies(SEs)first increased to 98.9%,then dropped to 97.6%in 10 min because of *** tackle this problem,FM deposited with 0%–10%silica nanoparticle(NPsFMs),then coated by fluorocarbon polymer(X-[CH_(2)CH_(2)O]nCH_(2)CH_(2)O-Y-NH-COOCH_(2)C4F9)(FCNPs FMs),was used to enhance its roughness and regulate its initial wettability to improve the anti-fouling *** and FCNPs FMs were hydrophobic and oleophobic in air and oleophobic *** water contact angles,oil contact angles and oil contact angles were 115.3°–121.1°,128.8°–136.5°,and 131.6°–136.7°,respectively,meeting the requirement of 90°–140°for coalescence *** FM-5 had the best separation performance with a constant value of 99.8%in 10 min,while that of FCNPs FM-10 slightly decreased to 99.5%.Theoretical released droplet(TRD)diameter,calculated by the square root of the product of pore radius and fiber diameter,was used for the evaluation of coalescence *** by two ideal models,TRD diameter and fiber diameter showed a parabola type relationship,proving that the separation efficiency was a collaborative work of wettability,pore size and fiber ***,it explained the SEs reduction from FCNPs FM-5 to FCNPs FM-10 was revelent to the three ***,FCNPsFMs effectively separated emulsions stabilized by cationic surfactant CTAB(SEs:97.3%–98.4%)and anionic surfactant SDBS(SEs:91.3%–93.4%).But they had an adverse effect on nonionic surfactant Tween-80 emulsion separation(SEs:94.0%–71.76%).Emulsions made by diverse oils can be effectively separated:octane(SEs:99.4%–100%),rapeseed oil(SEs:97.3%–98.8%),and diesel(SEs:95.2%–97.0%).These findings provide new in

关键词： Oil–water separation Fluorocarbon polymer Amphiphobic Coalescence

Ultra-deep Removal of Metal Ions from Coal Tar by Complexation:Experimental Studies and Density Functional Theory Simulations

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中国炼油与石油化工:英文版 2023年第3期25卷 127-135页

作者： Wu Hao Wei Hongyuan li wangliang School of Chemical Engineering and Technology Tianjin UniversityTianjin 300350China SINOPEC Research Institute of Petroleum Processing Co. Ltd.Beijing 100083China CAS Key Laboratory of Green Process and Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China

As one of the important aspects of upgrading coal tar,the ultra-deep removal of metal ions via the complexation method was investigated by screening four complexing agents and performing density functional theory(DFT)*** of the compositions and contents of the metallic compounds in the coal tar revealed that the main components were iron and calcium *** filtration reduced the mechanical impurity content from 0.24%to 0.0752%,indicating that most of the large particles could be easily *** the four complexing agents,namely,acetic acid,oxalic acid,citric acid,and ethylenediaminetetraacetic acid,oxalic acid exhibited the best demetallization *** DFT simulations suggested that the high performance of oxalic acid originated from its 1:1 coordination mode,rigid dicarboxyl structure,and greater binding energy.

关键词： complexation metallic compounds coal tar upgrading density functional theory

Dissolution of antibiotics mycelium in ionic liquids:Performance and mechanism

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Chinese Journal of Chemical Engineering 2018年第2期26卷 252-258页

作者： Jierong Yang wangliang li Qingfen liu Huizhou liu Key Laboratory of Green Process and Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China University ofChineseAcademy of Sciences Beijing 100049China

Antibiotics mycelium, byproduct of pharmaceutical industry, contains high percentage of proteins, polysaccharides and lipids, while, the low solubility in traditional solvents limits its utilization. The dissolution process of penicillin mycelium was investigated using ionic liquids （ILs） as solvent. Quantitative correlation of solubility and ILs structure and dissolution mechanism were determined. About 91 45% of penicillin mycelium was dissolved in 1-butyl-3-methylimidazolium acetate （[Bmim]Ac） under the condition of 120.0℃C and [Bmim]Ac/ mycelium （m/m） ratio of 3.90：1. Synergistic effect of ILs and DMSO was confirmed with the DMSO/[Bmim]Ac （v/m） ratio in the range of 0.0-1.0. At 25.0 ℃, the dissolution of penicillin mycelium increased from 69.74% to 94.50%, with the ratio of DMSO to [Bmim]Ac （v/m） as 1：1. The room temperature dissolution of mycelium provides a novel and energy-saving process for its high-valued utilization. The NMR and FT-IR spectra showed that hydrogen bonds are the dominant driving force for the dissolution in ILs. Quantitative study on the effects of anions and cations of lLs on dissolution using Kamlet-Taft model showed that there was a linearly positive correlation between solubility of penicillin mycelium and β parameter of the ILs. The solubility of mycelium increased with increasing hydrogen bond accepting ability of anions and donating ability of cations.

关键词： Antibiotics mycelium Ionic liquids Dissolution Driving forceRainier Taft parameters

Impact of double alkaline peroxide pretreatment on enzymatic hydrolysis of palm fibre

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Carbon Resources Conversion 2018年第2期1卷 147-152页

作者： Shengqiang Chang wangliang li Yuming Zhang CAS Key Laboratory of Green Process and Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Chemical&Environmental Engineering China University of Mining&Technology(Beijing)Beijing 100083China State Key Laboratory of Heavy Oil Processing China University of Petroleum-BeijingBeijing 102249China

A double pretreatment was developed to improve the efficiency of enzymatic hydrolysis and to increase the sugars production from palm fibre in batch and fed-batch *** alkaline peroxide pretreatment using NaOH-H_(2)O_(2)solution,rigid structure of palm fibre was broken and partial of the hemicelluloses and lignin were *** with cellulase Accellerase^(■)1500,when using the conjunction of Accellerase^(■)1500 and Optimash BG,the conversion ratio increased from 35.9%to 45.0%and the reducing sugar yield increased from 245 mg/g substrate to 307 mg/g *** further increase the hydrolysis efficiency,double pretreatment with NaOH-H_(2)O_(2)solution was used to treat the hydrolysized ***,the hydrolysis ratio reached 93%and reducing sugar yield was 752 mg/g ***-batch enzymatic hydrolysis was carried out with 7%(w/v)solids loading and 0.3 mL/g ***,7%solids were fed consecutively at 12 h,24 h,36 h and 48 *** 144 h,the final concentration of reducing sugar reached 214.0 g/L and total biomass conversion ratio was 75.23%.

关键词： Cellulase Palm fibre Reducing sugar lignin Alkaline peroxidepretreatment

Integration of high-solid digestion and gasification to dispose horticultural waste and chicken manure

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Chinese Journal of Chemical Engineering 2018年第5期26卷 1145-1151页

作者： wangliang li Changbo Lu Gaojun An Yuming Zhang Yen Wah Tong The Key Laboratory of Green Process and Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China Beijing POL Research Institute Beijing 102300 China State Key Laboratory of Heavy Oil Processing China University of Petroleum (Belting) Beijing 102249 China NUS Environment Research Institute National University of Singapore Singapore 117411 Singapore

To realize full energy recovery from grass and chicken manure(CM), the integration of high-solid anaerobic digestion(HSAD) and gasification was investigated experimentally. The anaerobic biodegradability of grass can be enhanced through codigestion with CM. When the volatile solid(VS) ratio of CM to grass was 20:80, C/N ratio calculated to be 21.70, the cumulative biogas yield was the highest, 237 ml·(g VS)^(-1). The enhancement of biogas production was attributed to the buffering effects of ammonia and rich trace elements in CM. In semi-continuous systems, when the organic loading rate was 4.0 g VS·L^(-1)·d^(-1), the HSAD process was stable, with the average biogas yield 168 ml·(g VS)^(-1). More than 80% fractions of the digestates were volatile matters, which meant that the digestates can be used as feedstock for gasification to produce syngas. The VS ratio of grass to CM had significant overall energy generation through HSAD and gasification. Compared with gasification of digestate,cogasification with woodchips increased syngas yield and low heat value(LHV). Increasing of mass ratio of digestates to woodchips led to the decrease of LHV.

关键词： Codigestion High-solid Chicken manure Yard waste Gasification Energy recovery

Fabrication of magnetically responsive anti-fouling and easy-cleaning nanofiber membrane and its application for efficient oil-water emulsion separation

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Chinese Journal of Chemical Engineering 2022年第1期35卷 286-293页

作者： Yajie Wang Zhiwei Guo Yujie Yang Yanxiang li Qingchun Guo Peilin Cui wangliang li CAS Key Laboratory of Green Process and Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Hebei Lansheng Biotech Co. LtdShijiazhuang 052200China International Medical Service Beijing Tiantan Hospital Affiliated to Capital Medical UniversityChina

The magnetically responsive anti-fouling nanofiber membrane(MRANM)was fabricated for efficient oilwater emulsion separation,which could be cleaned using oscillating magnetic *** was prepared by grafting superparamagnetic Fe_(3)O_(4) nanoparticles onto the surface of electrospun polyacrylonitrile nanofiber membrane(PANM).Compared with PANM,the water contact angle of MRANM decreased from 104°to 0°,indicating that the hydrophilicity of the membrane was significantly *** the emulsions of hexadecane,octane and rapeseed oil,the separation efficiency was 98.04%,96.59%and 92.67%,*** the treatments in oscillating magnetic field,the separation efficiency kept above 95%after 8 times recycling,which indicated that the MRANM had good regenerability and *** as-fabricated membrane with magnetic responsiveness facilitated an effective method for solving the membrane fouling problem during practical applications of separation high viscosity oil-water emulsion.

关键词： Superparamagnetic Nanofiber membrane Anti-fouling Oil-water emulsion Regeneration

Enhanced coalescence separation of oil-in-water emulsions using electrospun PVDF nanofibers

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Chinese Journal of Chemical Engineering 2021年第10期34卷 76-83页

作者： Yujie Yang Lei li Qian Zhang Wenwen Chen Song lin Zaiqian Wang wangliang li CAS Key Laboratory of Green Process and Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China Key Laboratory of Magnetic Molecules&Magnetic Information Materials Ministry of Education The School of Chemical and Material ScienceShanxi Normal UniversityLinfen 041004China Innovation Academy for Green Manufacture Chinese Academy of SciencesBeijing 100190China Guizhou Water Fuquan Co. LtdGuiyang 550081China

A novel and high-efficiency coalescence membrane enhanced by nano-sized polyvinylidene fluoride(PVDF)nanofibers based on polyester(PET)substrate was fabricated using electrospinning *** properties of the electrospun nanofibers such as roughness and surface morphology greatly affected the oil droplet interception efficiency and surface wettability of the membrane.A series of coalescence units were prepared with different layers of nanofibrous membrane and the separation efficiencies at different initial concentrations,flow rates,and oil types were *** is very interesting that the obtained nanofibrous membrane exhibited superoleophilicity in air but poor oleophilicity under water,which was beneficial to the coalescence *** coalescence unit with four membrane layers had excellent performances under different initial concentrations and flow *** separation efficiency of the 4-layers unit remained above 98.2%when the initial concentration reached up to 2000 mg·***,the unit also exhibited good performance with the increasing oil density and viscosity,which is promising for large-scale oil wastewater treatment.

关键词： Coalescence Electrospinning Nanofibrous membrane Oil-in-water emulsions

Selection of adsorbents for in-situ coupling technology of adsorptive desulfurization and biodesulfurization

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Science China Chemistry 2008年第1期51卷 69-77页

作者： ZHANG HuaiYing liU QingFen li YuGuang li wangliang XIONG XiaoChao XING JianMin liU HuiZhou State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100080China Graduate University of Chinese Academy of Sciences Beijing 100049China

In-situ coupling of adsorptive desulfurization and biodesulfurization is a new desulfurization technol- ogy for fossil oil. It has the merits of high-selectivity of biodesulfurization and high-rate of adsorptive desulfurization. It is carried out by assembling nano-adsorbents onto surfaces of microbial cells. In this work, In-situ coupling desulfurization technology of widely used desulfurization adsorbents of γ-Al2O3, Na-Y molecular sieves, and active carbon with Pseudomonas delafieldii R-8 were studied. Results show that Na-Y molecular sieves restrain the activity of R-8 cells and active carbon cannot desorb the sub- strate dibenzothiophene (DBT). Thus, they are not applicable to in-situ coupling desulfurization tech- nology. Gamma-Al2O3 can adsorb DBT from oil phase quickly, and then desorb it and transfer it to R-8 cells for biodegradation, thus increasing desulfurization rate. It is also found that nano-sized γ-Al2O3 increases desulfurization rate more than regular-sized γ-Al2O3. Therefore, nano- γ-Al2O3 is regarded as the better adsorbent for this in-situ coupling desulfurization technology.

关键词： adsorptive desulfurization biodesulfurization in-situ coupling adsorbents

Adsorptive desulfurization of diesel with mesoporous aluminosilicates

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Science China Chemistry 2009年第3期52卷 276-281页

作者： TANG Huang li wangliang liU QingFen GUAN lili SONG JiaQing XING JianMin liU HuiZhou National Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China Graduate University of Chinese Academy of Sciences Beijing 100049China SINOPEC Research Institute of Petroleum Processing Beijing 100083China

Mesoporous aluminosilicates (MAS) bearing microporous zeolite units and mesoporous structures were synthesized by the hydrothermal method. Adsorptive desulfurization ability of model oil and hy-drotreated diesel was studied. The effects of template concentration, crystalization time and calcination time were investigated. The desulfurization ability of adsorbents was improved by transitional metal ion-exchanging. The adsorptive desulfurization of diesel was carried out on a fixed-bed system. The results show that the adsorptive capacity is MAS>MCM-41>NaY. The improvement of desulfurization ability of MAS by Cu+ is more significant than that of Ag+.

关键词： diesel adsorptive desulfurization mesoporous aluminosilicates acidity pore texture