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Highly crystalline core dominated the catalytic performance of carbon dot for cyclohexane to adipic acid reaction

Nano Research 2022年第8期15卷 7662-7669页

作者： Xiao Wang Wenyi Bian Tianyang Zhang Yajie Zhao Mingwang Shao Haiping Lin Yang Liu Hui Huang Zhenhui Kang Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou 215123China Macao Institute of Materials Science and Engineering(MIMSE) MUST-SUDA Joint Research Center for Advanced Functional MaterialsMacao University of Science and TechnologyTaipa 999078MacaoChina School of Physics and Information Technology Shaanxi Normal UniversityXi’an 710062China

Carbon dots(CDs)have uniquely structural,physicochemical and photochemical properties,suggesting a promising platform for catalysis *** in-depth understanding of the structure-activity relationship in the CDs-based catalyst system needs to know the effect of the crystalline core on their catalytic *** efficient catalytic oxidation of cyclohexane is an urgent challenge in current chemical industry,in which,adipic acid(AA)plays an important role in industry for synthesis of nylon6 and ***,we fabricated the pristine CDs by electrochemical etching graphite rod method and derived CDs with high crystalline core(CD-600,CD-800,and CD-1100)through a thermal treatment method in tube ***,these CDs performed an outstanding catalytic performance for one-step synthesis of AA from *** the help of machine learning(ML),the deep correlations between features(structures of CDs,catalytic conditions)and catalytic performances were investigated by XGBoost(XGB)*** under the optimization and prediction of XGB,it was found that high crystalline core preceded the other features and CD-1100 could get the best conversion of 30.696%and selectivity to AA of 92.52%at reaction conditions of 130℃,1.5 MPa,and 10 *** work pioneered the application of ML in industrial issues and demonstrated a comprehensive understanding on CDs as catalyst to realize one-step synthesis of AA.

关键词： adipic acid carbon dots machine learning catalytic performances crystalline core

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Study on Liquid Phase Ammoniation of adipic acid to Adiponitrile

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Chinese Journal of Chemical Engineering 1999年第1期7卷 77-82页

作者：高峰鲁波浙江大学化工系浙江杭州

The reaction mechanism of the liquid phase ammoniation of adipic acid to adiponitrile was studied experimentally in a semi-batch reactor. Macrokinetics of the main and side reactions were identified to minimize corrosion and coking to prolong the operation period, to increase the yield of adiponitrile and to improve the design of the reactor. Macrokinetic equations of ammoniation-neutralization of adipic acid and dehydration were of first-order to adipic concentration cB≥3.5% and of second order for cB≥3.5%. Catalyst H3PO4 reduced the activation energy of neutralization and dehydration reactions of adipic acid and was significantly important for the second step of dehydration to produce adiponitrile.

关键词： adipic acid liquid phase ammoniation adiponitrile

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Kinetic study for the oxidation of cyclohexanol and cyclohexanone with nitric acid to adipic acid

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Chinese Journal of Chemical Engineering 2021年第1期34卷 183-189页

作者： Detao Pan Guangxiao Li Yuanhai Su Huilong Wei Zhenghong Luo Department of Chemical Engineering School of Chemistry and Chemical EngineeringState Key Laboratory of Metal Matrix CompositesShanghai Jiao Tong UniversityShanghai 200240China

The adipic acid is an important intermediate in the production of nylon,polyurethane and polye ster resin *** industrial approach for preparing adipic acid is through the liquid catalytic oxidation of KA oil with nitric *** this work,a comprehensive model is developed for this reaction based on the kinetic study conducted in a continuous flow tubular *** kinetic model fits well with the experimental results across the experimental conditions,and the average relative error between the calculated and experimental values is 5.7%.Results show that there was an induction period at the early stage of ***,it is found that at temperature range of 328-358 K,the formation rate of adipic acid strongly dependents on the temperature and nitric acid *** developed model is used to predict the yield of adipic acid at 359-368 *** work in this study could provide much knowledge for industrial tubular reactor design.

关键词： adipic acid Nitric acid Tubular reactor Kinetic model

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Highly dispersed metal incorporated hexagonal mesoporous silicates for catalytic cyclohexanone oxidation to adipic acid

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Chinese Journal of Chemical Engineering 2020年第10期28卷 2542-2548页

作者： Wenjuan Yan Wenxiang Zhang Qi Xia Shuaishuai Wang Shuxia Zhang Jian Shen Xin Jin State Key Laboratory of Heavy Oil Processing Center for Chemical Engineering Experimental TeachingChina University of PetroleumQingdao 266580China College of Environment and Resources Xiangtan UniversityXiangtan 411105China

adipic acid is a dicarboxylic acid of great industrial importance,mainly used in the production of nylon-6,6 and *** use of nitric acid as an oxidant in the industrial production of adipic acid poses significant carbon footprint to the *** adipic acid synthesis methods using a heterogeneous catalyst with H2O2 as oxidant and water as solvent have potential advantages of low catalyst cost,easy synthesis and recovery,cleanness and environmental *** this work,hexagonal mesoporous silicate materials were synthesized by a sol–gel method and evaluated for cyclohexanol/cyclohexanone oxidation to adipic *** physical and chemical properties of Fe-HMS were characterized by XRD,HR-TEM,BET and UV–*** experimental results showed that Fe-HMS materials show pore sizes ranging from 2–3 nm.W-and Mo-based polyoxometalates were also evaluated and compared to the Fe-based HMS *** improve the adipic acid yield,the influence of the transition metal as well as the effect of metal loading,reaction temperature and catalyst amount on the catalytic performances of Fe-HMS have been investigated in *** Si/Fe atomic ratio=100,Fe-HMS catalyst shows the highest activity,with a cyclohexanone conversion of 92.3%and adipic acid selectivity of 29.4%.The reaction pathway of cyclohexanone oxidation was further proposed based on experimental data.

关键词： Oxidation adipic acid Hexagonal mesoporous silicates hydrogen peroxide

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Scenario analysis on abating industrial process greenhouse gas emissions from adipic acid production in China

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Petroleum Science 2020年第4期17卷 1171-1179页

作者： Qing Tong Han-Yi Lin Xu-Ying Qin Run-Sheng Yan Yue-Feng Guo Xin-Yang Wei Institute of Nuclear and New Energy Technology Tsinghua UniversityBeijing 100084China School of Energy Power and Mechanical EngineeringNorth China Electric Power UniversityBeijing 102206China Environmental Protection Research Institute of Light Industry Beijing 100089China State Key Laboratory of Virtual Reality and Suzhou Institute of Beihang University Suzhou 215200China Department of Accounting and Finance School of BusinessMacao University of Science and TechnologyMacao 999078China

adipic acid is an important petrochemical product,and its production process emits a high concentration of greenhouse gas N_2 *** paper aims to provide quantitative references for relevant authorities to formulate greenhouse gas control *** forecasting method of this paper is consistent with the published national inventory in terms of *** on the N_2 O abatement technical parameters of adipic acid and the production trend,this paper combines the scenario analysis and provides a measurement of comprehensive N_2 O abatement effect of the entire industry in *** future scenarios are *** baseline scenario(BAUS) is a frozen *** emission abatement scenarios(ANAS,SNAS,and ENAS) are assumed under different strength of abatement driving *** results show that China's adipic acid production process can achieve increasingly significant N_2 O emission abatement *** to the baseline scenario,by 2030,the N_2 O emission abatements of the three emission abatement scenarios can reach 207-399 kt and the emission abatement ratios can reach 32.5%-62.6%.By 2050,the N_2 O emission abatements for the three emission abatement scenarios can reach 387-540 kt and the emission abatement ratios can reach 71.4%-99.6%.

关键词： Scenario analysis Industrial process greenhouse gas emissions adipic acid N2O emission abatement China

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Studies on QSAR of metalloporphyrin catalysts in the oxidation of cyclohexane to adipic acid

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Frontiers of Chemical Science and Engineering 2007年第2期1卷 155-161页

作者： CHEN Yixia SHE Yuanbin XU Jing LI Yan Institute of Green Chemistry and Fine Chemicals and Department of Chemistry and Chemical Engineering College of Environmental and Energy EngineeringBeijing University of TechnologyBeijing 100022China

The catalysis of chloridized metalloporphyrins in the oxidation of cyclohexane to adipic acid was systemati-cally *** turnover numbers(TON)data of 19 catalysts were obtained experimentally under optimal reac-tion conditions,and 2.4x106 TON for T(o-Cl)PP-MnIIICl catalyst at 2.0x10–6 mol/L of dosage was reached under the conditions of dioxygen pressure of 2.5 MPa at 150°C for 4 *** was the best result reported for this reaction up to *** QSAR models for each concerned metallopor-phyrin were established,where the catalytic activity was significantly correlated with the ELUMO(the energy level of the lowest unoccupied molecule orbit)and LM-N(the bond length between metal-nitrogen atoms).Using the QSAR models,four new metalloporphyrins with substituted nitro group were designed,and their catalytic activities were *** experimental TON data of newly designed porphyrins were in good agreement with the predicted ones,and the square of their correlation coefficient was more than *** above results demonstrated that the proposed structure-activity relationship model could be applied to design some new metalloporphyrin catalysts,and to predict their catalytic activity in cyclohexane oxidation.

关键词： metalloporphyrin catalyst quantitative structure-activity relationship(QSAR)model cyclohexane oxidation adipic acid

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Influence of adipic acid on anodic film formation and corrosion resistance of 2024 aluminum alloy

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Transactions of Nonferrous Metals Society of China 2016年第2期26卷 492-500页

作者：李英东张优李松梅赵丕植北京航空航天大学材料科学与工程学院北京100191 中铝科学技术研究院有限公司北京102209

The influence of adipic acid on the formation and corrosion resistance of anodic oxide film fabricated on 2024 aluminum alloy was investigated. The morphology was investigated by scanning electron microscopy （SEM） and transmission electron microscopy （TEM）, respectively. The corrosion resistance was evaluated by electrochemical impedance spectroscopy （EIS）. The results showed that the adipic acid was absorbed at the electrolyte/anodic layer interface during anodizing. The corrosion rate of anodic film decreased and the film thickness increased. The film was uniform and compact especially at the film/substrate interface. After sealing procedure, anodic film formed with the addition of adipic acid exhibited improved dielectric property and corrosion resistance in aggressive environment.

关键词： aluminum alloy anodic oxidation adipic acid adsorption corrosion

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Measurement and Correlation of Solubilities of adipic acid in Different Solvents

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Chinese Journal of Chemical Engineering 2009年第3期17卷 473-477页

作者：毛治博孙晓波栾向海王钰刘国际 College of Chemical Engineering Zhengzhou University

Using a simple and reliable apparatus, the solubilities of adipic acid in water, ethanol, chloroform, n-butanol and acetone are determined by the analytic method. The results are correlated with λh equation, Apelblat equation, and UNIFAC equation. The solubilities calculated by these models are in good agreement with experi-mental data, so that the models can meet the requirements of engineering design.

关键词： solubility adipic acid correlation

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Measurement and Correlation for Solubility of adipic acid in Several Solvents

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Chinese Journal of Chemical Engineering 2007年第1期15卷 110-114页

作者：樊丽华马沛生相政乐 School of Chemical Engineering Tianjin University Tianjin 300072 China

Using a laser detecting system, solubility data were measured for adipic acid dissolved in six pure solvents, namely, cyclohexanone, cyclohexanol, acetic acid, N,N-dimethylformamide, N,N-dimethylacetamide, and dimethylsulfoxide at the temperature range from 293.15K to 353.15K. All these data were regressed by 2h, NRTL, Wilson, and the modified Wilson models. For the study of six, 2h, NRTL, and the modified Wilson models were found to provide an accurate mathematical representation of the experimental results, with overall average absolute relative deviations between measured and calculated values as 1.74%, 2.06%, and 3.06%, respectively. The results showed that the λh model is the most suitable for description of the solid-liquid equilibrium containing adipic acid.

关键词： solid-liquid equilibrium solubility adipic acid modeling

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Comparative Heat Transfer Data for Solid-Liquid Phase Change of D-Mannitol and adipic acid

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Energy and Power Engineering 2022年第11期14卷 680-704页

作者： Ulyana Horbatyuk Ana Magalhães Victor Ferreira Carlos Pinho CEFT DEMEC Faculty of Engineering University of Porto Porto Portugal

The goal of this work was to measure the heat transfer rates from thermofluid, Therminol 66, to two phase change materials, D-mannitol and adipic acid. It concerns the determination of heat transfer coefficients for the design of a concentrated solar energy plant requiring PCM thermal energy storage and is part of a wider set of experiments, where several PCMs were tested. An experimental installation was used with a cylindrical vessel with three tubes disposed almost horizontally (5°inclination), containing the phase change material, around which the thermal fluid flowed almost perpendicular to the tubes. The experimental installation allowed to recreate heating and cooling cycles. In order to evaluate the influence of the flow on the rate at which the heating and cooling processes took place, tests were performed at different thermofluid mass flow rates, concluding that there is no great influence, since the thermal resistance inside the tubes is much higher than on the outside. D-mannitol and adipic acid, present different phase change temperatures, 164°C for D-mannitol and 152°C for adipic acid. The average heat transfer coefficient, during the phase change process, was of 340 W/(m2K) for D-mannitol and 1320 W/(m2K) for adipic acid.

关键词： adipic acid D-Mannitol Heat Transfer Coefficient Phase Change Materials

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