检索结果-南通市图书馆

Nano Research 2022年第8期15卷 7695-7702页

作者： Ying Liu Qianqian Xu Lihang Chen Changhua Song Qiwei Yang Zhiguo Zhang Dan Lu Yiwen Yang Qilong Ren Zongbi Bao key laboratory of biomass chemical engineering of ministry of education College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027China Institute of zhejiang university-Quzhou Quzhou 324000China

The separation of light hydrocarbons,including C_(2)H_(6)and C_(3)H_(8),is essential to natural gas ***,N_(2)removal from CH_(4)is also crucial to concentrating low-quality coalbed methane,but the adsorption process is challenging because of the close kinetic *** work reports two hydrogen-bonded metal-nucleobase frameworks(HOF-ZJU-201 and HOF-ZJU202)capable of efficiently separating C_(3)H_(8)/CH_(4),C_(2)H_(6)/CH_(4),and CH_(4)/N_(2).Due to strong affinity for C_(3)H_(8)and C_(2)H_(6),the lowpressure capacity for C_(3)H_(8)(5 kPa)and C_(2)H_(6)(10 kPa)of HOF-ZJU-201a exceeds most *** ideal adsorbed solution theory(IAST)selectivity of C_(3)H_(8)/CH_(4)and C_(2)H_(6)/CH_(4)is 119 and 45 at ambient *** to density functional theory calculations,surface polarization environments formed by electron-rich anions and electron-deficient purine heterocyclic rings contribute to the selective capture of C_(3)H_(8)and C_(2)H_(6)with greater ***,the high CH_(4)adsorption capacity(1.73 mmol/g for HOF-ZJU-201a and 1.50 mmol/g for HOF-ZJU-202a at 298 K and 1.0 bar)and excellent CH_(4)/N_(2)selectivity(6.0 for HOF-ZJU-201 at 298 K),as well as dynamic breakthrough experiments of binary CH_(4)/N_(2)gas mixture implied their efficacy in the concentration of low-quality coalbed methane.

关键词： hydrogen-bonded frameworks methane natural gas adsorption separation

Temperature-dependent solubility of Rebaudioside A in methanol/ethanol and ethyl acetate mixtures:Experimental measurements and thermodynamic modeling

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of chemical engineering 2024年第8期72卷 164-176页

作者： Zhenguang Liu Zexiang Ding Yifeng Cao Baojian Liu Qiwei Yang Zhiguo Zhang Qilong Ren Zongbi Bao key laboratory of biomass chemical engineering of ministry of education College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310058China Institute of zhejiang university-Quzhou Quzhou 324000China

The equilibrium solubility of Rebaudioside A(Reb A)FormⅡin binary mixtures of methanol/ethanol and ethyl acetate was quantitatively determined within the temperature range of 283.15—328.15 K at ambient *** experimental findings indicate a positive correlation between the solubility of Reb A(FormⅡ)and both the temperature and the methanol/ethanol content in the solvent *** describe the solubility data,six distinct models were employed:the modified Apelblat equation,theλh model,the combined nearly ideal binary solvent/Redlich—Kister(CNIBS/R—K)model,the van't HoffJouyban-Acree(VJA)model,the Apelblat-Jouyban-Acree(AJA)model,and the non-random two-liquid(NRTL)*** combined nearly ideal binary solvent/Redlich—Kister model exhibited the most precise fit for solubility in methanol+ethyl acetate mixtures,reflected by an average relative deviation(ARD)of 0.0011 and a root mean square deviation(RMSD)of 12×10^(-7).Conversely,for ethanol+ethyl acetate mixtures,the modified Apelblat equation provided a superior correlation(ARD=0.0014,RMSD=4×10^(-7)).Furthermore,thermodynamic parameters associated with the dissolution of Reb A(FormⅡ),including enthalpy,entropy,and the Gibbs energy change,were inferred from the *** findings underscore that the dissolution process is predominantly endothermic across the solvent systems ***,the entropy changes appear to have a significant influence on the Gibbs free energy associated with the dissolution of Reb A(FormⅡ),suggesting that entropic factors may play a pivotal role in the studied systems.

关键词： Rebaudioside A Solubility Thermodynamic modeling Dissolution Binary solvent

Rational design on photoelectrodes and devices to boost photoelectrochemical performance of solar-driven water splitting: a mini review

在线全文

学校读者我要写书评

暂无评论

Frontiers of chemical Science and engineering 2022年第6期16卷 777-798页

作者： Siliu Lyu Muhammad Adnan Younis Zhibin Liu Libin Zeng Xianyun Peng Bin Yang Zhongjian Li Lecheng Lei Yang Hou key laboratory of biomass chemical engineering of ministry of education College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027China Institute of zhejiang university-Quzhou Quzhou 324000China

As an eco-friendly,efficient,and low-cost technique,photoelectrochemical water splitting has attracted growing interest in the production of clean and sustainable hydrogen by the conversion of abundant solar *** the photoelectrochemical system,the photoelectrode plays a vital role in absorbing the energy of sunlight to trigger the water splitting process and the overall efficiency depends largely on the integration and design of photoelectrochemical *** recent years,the optimization of photoelectrodes and photoelectrochemical devices to achieve highly efficient hydrogen production has been extensively *** this paper,a concise review of recent advances in the modification of nanostructured photoelectrodes and the design of photoelectrochemical devices is ***,the general principles of structural and morphological factors in altering the photoelectrochemical performance of photoelectrodes are ***,the performance indicators and first principles to describe the behaviors of charge carriers are analyzed,which will be of profound guiding significance to increasing the overall efficiency of the photoelectrochemical water splitting ***,current challenges and prospects for an in-depth understanding of reaction mechanisms using advanced characterization technologies and potential strategies for developing novel photoelectrodes and advanced photoelectrochemical water splitting devices are demonstrated.

关键词： photoelectrochemical water splitting photoelectrodes hydrogen production charge separation catalytic mechanism

Optimizing electronic structure of NiFe LDH with Mn-doping and Fe_(0.64)Ni_(0.36)alloy for alkaline water oxidation under industrial current density

在线全文

学校读者我要写书评

暂无评论

Nano Research 2023年第7期16卷 8953-8960页

作者： Yang Qian Fan Zhang Lingshu Qiu Weiwei Han Zixu Zeng Lecheng Lei Yi He Ping Li Xingwang Zhang key laboratory of biomass chemical engineering of ministry of education College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027China Institute of zhejiang university-Quzhou Quzhou 324000China

Alkaline electrolyzers for water splitting under the industrial current densities are always burdened with huge energy consumption due to the high overpotential and poor stability of the anode nanocatalysts for oxygen evolution reaction(OER).Inspired by the interfacial charge transfer for enhancing the performance,a series of in-situ grown interfacial Mn-NiFe lactate dehydrogenase(LDH)was designed on the Fe_(0.64)Ni_(0.36)/NM(nickel mesh)alloy *** optimized Mn_(0.15)-NiFe LDH/Fe_(0.64)Ni_(0.36)/NM exhibited an ultralow overpotential of 295 mV to drive 500 mA·cm^(-2)and an incredible stability under large current *** interfacial space and heteroatom doping synergistically triggered the electronic structure optimization to promote electron transfer and ensure the durability of the high-current ***,the designed Mn_(0.15)-NiFe LDH/Fe_(0.64)Ni_(0.36)/NM as an anode in an integral alkaline electrolyzer exhibited a cell voltage of 1.78 V at 500 mA·cm^(-2) with a stability of 366 *** functional theory(DFT)calculations further demonstrated the synergistic effect of alloy layer introduction and Mn doping could accelerate electron transfer and stabilize the charged active center to activate the NiFe LDH and reduce the OER energy *** work offers new insights into developing efficient self-supported catalysts for high-current alkaline water oxidation.

关键词： heteroatom doping alloy layer introduction synergistic effect high-current alkaline water oxidation

A robust ethane-trapping metal-organic framework for efficient purification of ethylene

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2021年第4期64卷 666-672页

作者： Sisi Jiang Liangying Li Lidong Guo Changhua Song Qiwei Yang Zhiguo Zhang Yiwen Yang Qilong Ren Zongbi Bao key laboratory of biomass chemical engineering of the ministry of education College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027China Institute of zhejiang university-Quzhou Quzhou 324000China

Owing to the similar physicochemical properties between ethane(C_(2)H_(6))and ethylene(C_(2)H_(4)),obtaining polymerization-grade C_(2)H_(4)(≥99.95%pure)is still a tricky problem in the petrochemical ***,we report a robust scandium-based metalorganic framework(Sc BPDC),which is connected by oxygen-rich phenyl ligand with exceptionally high thermal stability(up to873 K)and capacity of C_(2)H_(6)(4.94 mmol/g at 100 k Pa and 283 K),exhibiting superior separation performance of C_(2)H_(6)/C_(2)H_(4) mixture(the IAST selectivity is up to 1.7 at 283 K).Importantly,Sc BPDC can produce 8.96 L/kg C_(2)H_(4) with≥99.99%purity while the C_(2)H_(4)/C_(2)H_(6)(50:50,v/v)as the mixture injection and the low isosteric heat of Sc BPDC(16.4 k J/mol for C_(2)H_(6))validates the facility of adsorbent ***,theoretical calculations demonstrate the C_(2)H_(6) molecules are trapped in the nonpolar pore surface via C–H···πand C–H···O interactions between multiple hydrogen atoms of C_(2)H_(6) and the host framework.

关键词： metal-organic frameworks adsorption separation ethane ethylene

Targeted synthesis of zeolites from calculated interaction between zeolite structure and organic template

在线全文

学校读者我要写书评

暂无评论

National Science Review 2022年第9期9卷 67-78页

作者： Qinming Wu Huimin Luan Feng-Shou Xiao key Lab of biomass chemical engineering of ministry of education College of Chemical and Biological Engineering Zhejiang University key Lab of Applied Chemistry of zhejiang Province Department of Chemistry Zhejiang University

Zeolites,a class of silica-based porous materials,have been widely employed in the chemical industry for uses such as sorption,separation,catalysis and ion ***,the synthesis of zeolites is performed in the presence of organic templates via a trial-and-error route,which is labor-intensive and *** recent years,theoretical simulation from the interaction between a zeolite structure and an organic template has been used to guide the synthesis of zeolites,which is *** this review,recent progress in the targeted synthesis of zeolites from interaction between a zeolite structure and an organic template are briefly outlined including the design of new templates for zeolite synthesis,preparation of zeolites with new composition,development of novel routes for zeolite synthesis,synthesis of intergrowth zeolites,generation of novel zeolite structures,control of zeolite morphology and modulation of aluminum distribution in *** targeted syntheses reveal that the minimum energy principle from the theoretical simulation is key for guiding zeolite *** review will be important for zeolite researchers for rationally synthesizing zeolites and effectively designing new zeolite structures.

关键词： zeolite organic template targeted synthesis interaction energy theoretical simulation

Efficient electrocatalytic oxygen evolution at ultra-high current densities over 3D Fe,N doped Ni(OH)_(2) nanosheets

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese chemical Letters 2021年第3期32卷 1210-1214页

作者： Pu Shi Xiaodi Cheng Siliu Lyu key laboratory of biomass chemical engineering of ministry of education College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027China

Developing highly efficient nickel or iron based hydroxide electrocatalysts is primary essential but challenging for oxygen evolution reaction(OER)at ultra-high current ***,we developed a facile method to prepare nitrogen and iron doped nickel(Ⅱ)hydroxide nanosheets on self-supported conductive nickel foam(denoted as Fe,N-Ni(OH)_(2)/NF)through ammonia hydrothermal and impregnation *** to the optimization of the electronic structure by nitrogen doping and the strong synergistic effect between Fe and Ni(OH)_(2),the three-dimensional(3 D)Fe,N-Ni(OH)_(2)/NF nanosheets delivered superior electrocatalytic OER performances in basic solution with low potentials of 1.57 V and1.59 V under 500 mA/cm^(2)and 1000 mA/cm^(2)respectively and robust operation for 10 h with ignored activity decay,comparing well with the potentials of previously reported NiFe based electrocatalysts as well as the benchmark commercial Ir/C/***-situ Raman spectroscopy revealed that the main active species were NiOOH during the OER *** present results are expected to provide new insights into the study of OER process towards ultra-high current densities.

关键词： Vapor phase hydrothermal Nitrogen doped NiOOH Oxygen evolution reactio Ultra-high current density

Mesoporous zeolites for biofuel upgrading and glycerol conversion

在线全文

学校读者我要写书评

暂无评论

Frontiers of chemical Science and engineering 2018年第1期12卷 132-144页

作者： Jian Zhang Liang Wang Yanyan Ji Fang Chen Feng-Shou Xiao key laboratory of Applied Chemistry of zhejiang Province and Department of Chemistry Zhejiang University Hangzhou 310028 China key laboratory of biomass chemical engineering of ministry of education Zhejiang University Hangzhou 310027 China

With the recent emphasis and development of sustainable chemistry, the conversion of biomass feed- stocks into alternative fuels and fine chemicals over various heterogeneous catalysts has received much attention. In particular, owing to their uniform micropores, strong acidity, and stable and rigid frameworks, zeolites as catalysts or co-catalysts have exhibited excellent catalytic performances in many reactions, including hydrodesulfurization, Fischer-Tropsch synthesis, and hydrodeoxygenation. However, the relatively small sizes of the zeolite micropores strongly limit the conversion of bulky biomolecules. To overcome this issue, mesoporous zeolites with pores larger than those of biomolecules have been synthesized. As expected, these mesoporous zeolites have outperformed conventional zeolites with improved activ- ities, better selectivities, and longer catalyst lives for the upgrading of pyrolysis oils, the transformation of lipids into biofuels, and the conversion of glycerol into acrolein and aromatic compounds. This review briefly summarizes recent works on the rational synthesis of mesoporous zeolites and their superior catalytic properties in biomass conversion.

关键词： biomass conversion mesoporous zeolite sustainable chemistry

Removal process and mechanism of hexavalent chromium by adsorption-coupled reduction with marine-derived Aspergillus niger mycelial pellets

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of chemical engineering 2022年第9期35卷 198-204页

作者： Shanshan Xu Qilei Zhang Dongmei Bai Linian Cai Tao Lu Shanjing Yao key laboratory of biomass chemical engineering of ministry of education College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027China College of Environment Zhejiang University of TechnologyHangzhou 310014China

In order to remove hexavalent chromium(Cr(Ⅵ))from solutions efficiently,the mycelial pellets with a marine-derived fungus Aspergillus niger as a biosorbent were *** effects of removal process parameters such as solution pH,initial Cr(Ⅵ)concentration and biomass concentration on Cr(Ⅵ)removal process were *** results showed that Cr(Ⅵ)removal rate up to 100%could be achieved under optimized conditions,which indicated the excellent Cr(Ⅵ)removal performance of the Aspergillus niger *** a more important point,the Cr(Ⅵ)removal mechanism was studied,and the results revealed that Cr(Ⅵ)removal was achieved in the adsorption-coupled reduction process.A little of Cr(Ⅵ)was reduced to less toxic trivalent chromium(Cr(Ⅲ))in solution,while some was absorbed on the surface of mycelial *** they may be reduced on the surface or transferred into cells and then be *** marine-derived *** mycelial pellets show properties of easy preparation and separation and cost effectiveness,which are potential biosorbent and reductant in the treatment of trace chromate containing wastewater.

关键词： Cr(Ⅵ)removal Aspergillus niger Mycelial pellets Adsorbent Reduction

Salt-tolerant mechanism of marine Aspergillus niger cellulase cocktail and improvement of its activity

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of chemical engineering 2020年第4期28卷 1120-1128页

作者： Linian Cai Shengnan Xu Tao Lu Dongqiang Lin Shanjing Yao key laboratory of biomass chemical engineering of ministry of education College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027China College of Environment Zhejiang University of TechnologyHangzhou 310014China

The cellulase cocktail produced by marine Aspergillus niger exhibits a property of salt-tolerance,which is of great potential in cellulose degradation in high salt *** order to explain the mechanism on the salttolerance of the cellulase cocktail produced by marine ***,six cellulase components(AnCel6,AnCel7A,AnCel7B,AnEGL,AnBGL1 and AnBGL2)were obtained by directed *** on their enzymatic properties revealed that oneβ-glucosidase(AnBGL2)and one endoglucanase(AnEGL)exhibited an outstanding salttolerant property,and one cellobiohydrolase(AnCel7B)exhibited a certain salt-tolerant *** study revealed that the salt-tolerant An EGL and AnCel7B endowed the cellulase cocktail with stronger salttolerant property,while the salt-tolerant An BGL2 had no positive ***,after overexpression of AnCel6,AnCel7A,AnCel7B and AnEGL,the activity of cellulase cocktail increased by 80%,70%,63%and 68%,***,the activity of cellulase cocktail was not improved after overexpression of AnBGL1 and *** mixed-strain fermentation with cellobiohydrolase recombinants(cel6 a,cel7a and cel7b recombinants)and endoglucanase recombinant(egl recombinant),the the activity of cellulase cocktail increased by 114%,102%and91%,respectively.

关键词： Marine Aspergillus niger Cellulase component Directed expression Salt-tolerance Cellulase activity