检索结果-南通市图书馆

Simultaneous production and utilization of methanol for methyl formate synthesis in a looped heat exchanger reactor configuration

在线全文

学校读者我要写书评

暂无评论

Journal of Natural Gas Chemistry 2012年第6期21卷 661-672页

作者： A.Goosheneshin R.Maleki D.Iranshahi M.R.Rahimpour A.Jahanmiri Department of Chemical Engineering Lamerd Branch Islamic Azad University Chemical Engineering Department School of Chemical and Petroleum Engineering Shiraz University

In this investigation, a novel thermally coupled reactor （TCR） containing methyl formate （MF） production in the endothermic side and methanol synthesis in the exothermic side has been investigated. The interesting feature of this TCR is that productive methanol in the exothermic side could be recycled and used as feed of endothermic side for MF synthesis. Other important advantages of the proposed system are high production rates of hydrogen and MF. The configuration consists of two thermally coupled concentric tubular reactors. In these coupled reactors, autothermal system is obtained within the reactor. A steady-state heterogeneous model is used for simulation of the coupled reactor. The proposed model has been utilized to compare the performance of TCR with the conventional methanol reactor （CMR）. Noticeable enhancement can be obtained in the performance of the reactors. The influence of operational parameters is studied on reactor performance. The results show that coupling of these reactions could be feasible and beneficial. Experimental proof-of-concept is required to validate the operation of the novel reactor.

关键词： methyl formate methanol synthesis looped heat exchanger reactor configuration steady-state heterogeneous model

Harnessing dimethyl ether and methyl formate fuels for direct electrochemical energy conversion

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2023年第8期83卷 454-464,I0012页

作者： Medhanie Gebremedhin Gebru Radhey Shyam Yadav Hanan Teller Haya Kornweitz Palaniappan Subramanian Alex Schechter Department of Chemical Science Ariel UniversityAriel 40700Israel New Technologies-Research Centre(NTC).University of West Bohemia Pilsen 30100Czech Republic

In this work,the oxidation of a mixture of dimethyl ether(DME) and methyl formate(MF) was studied in both an aqueous electrochemical cell and a vapor-fed polymer electrolyte membrane fuel cell(PEMFC)utilizing a multi-metallic alloy catalyst,Pt_(3)Pd_(3)Sn_(2)/C,discovered earlier by *** current obtained during the bulk oxidation of a DME-saturated 1 M MF was higher than the summation of the currents provided by the two fuels separately,suggesting the cooperative effect of mixing these fuels.A significant increase in the anodic charge was realized during oxidative stripping of a pre-adsorbed DME+MF mixture as compared to DME or MF *** is ascribed to greater utilization of specific catalytic sites on account of the relatively lower adsorption energy of the dual-molecules than of the sum of the individual molecules as confirmed by the density fu nctional theory(DFT) *** cell polarization was also conducted using a Pt_(3)Pd_(3)Sn_(2)/C(anode) and Pt/C(cathode) catalysts-coated membrane(CCM).The enhanced surface coverage and active site utilization resulted in providing a higher peak power density by the DME+MF mixture-fed fuel cell(123 mW cm^(-2)at 0.45 V) than with DME(84mW cm^(-2)at 0.35 V) or MF(28 mW cm^(-2)at 0.2 V) at the same total anode hydrocarbon flow rate,temperature,and ambient pressure.

关键词： Dimethyl ether methyl formate Fuel cell Electrocatalysis Multi-metallic alloy

Catalytic Systems Containing p-Toluenesulfonic Acid for the Coupling Reaction of Formaldehyde and methyl formate

在线全文

学校读者我要写书评

暂无评论

Journal of Natural Gas Chemistry 2007年第3期16卷 286-292页

作者： Kebing Wang Jie Yao Yue Wang Gongying Wang Chengdu Institute of Organic Chemistry Chinese Academy of Sciences Chengdu 610041 Sichuan China Graduate School of Chinese Academy of Sciences Beijing 100039 China

The coupling reaction of formaldehyde （FA） and methyl formate （MF） to form methyl glycolate （MG） and methyl methoxy acetate （MMAc）, catalyzed by p-toluenesulfonic acid （p-TsOH） as well as assisted by different kinds of solvents or Ni-containing compounds, had been investigated. The results showed that when the reaction was carried out at 140 ℃, with a molar ratio of FA to MF of 0.65 ： 1, molar fraction of p-TsOH to total feedstock of 11.0%, and reaction time of 3 h, the yield of MG and MMAc was 31.1% and 17.1%, respectively, p-TsOH catalyzed the coupling reaction by means of the synergistic catalysis of protonic acidity and soft basicity. Adding extra solvents to the reaction system was unfavorable for the reaction. The composite catalytic system consisting of p-TsOH and NiX2 （X=Cl, Br, I） exhibited a high catalytic performance for the coupling reaction, and NiX2 acted as a promoter in the reaction, whose promotion for the catalysis increased in the following order： NiCl2〈NiBr2〈NiI2. The present system is less corrosive when compared with the previous system, in which strong inorganic liquid acids were used as catalysts.

关键词： formaldehyde methyl formate methyl glycolate methyl methoxy acetate p-toluenesulfonicacid

Study of Catalysts on the Synthesis of methyl Acrylate by Hydroesterification of methyl formate with Acetylene

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2000年第6期11卷 521-524页

作者： Xin Han HUANG Xian Gui YANG Jia Qi ZHANG Zhao Tie LIU(Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041) Chinese Acad Sci Chengdu Inst Organ Chem Chengdu 610041 Peoples R China

The catalytic hydroesterification of methyl formate (MF) with acetylene to methyl acrylate (MA) over nickel-based catalysts prepared by impregnation has been comprehensively studied in a fixed bed reactor at 160 similar to 240 degrees C and under 4 similar to 6MPa GHSV: 630h(-1), CO:N-2:C2H2 = 65:28:7. In present work, we have found a catalyst of 11wt%NiO/Al2O3 (80 similar to 100 mesh) prepared by wet impregnation with NiCl2 aqueous solution, then calcined in air at 500 degrees C for 5 h. The selectivity to methyl acrylate and the conversion of methyl formate over 11wt%NiO/Al2O3 catalyst are higher than other catalysts studied in this paper. The optimum reaction temperature for the hydroesterification of methyl formate with acetylene to methyl acrylate is around 220 degrees C.

关键词： Ni-based catalyst methyl formate methyl acrylate acetylene

Pd nanoparticles immobilized on MIL-53(Al)as highly e ective bifunctional catalysts for oxidation of liquid methanol to methyl formate

在线全文

学校读者我要写书评

暂无评论

Petroleum Science 2019年第4期16卷 901-911页

作者： Jian-Fang Liu Jin-Cheng Mu Rong-Xian Qin Sheng-Fu Ji State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology

A series of Pd/MIL-53(Al) heterogeneous bifunctional catalysts with di erent Pd contents were prepared by an impregnation method. The prepared metal–organic frameworks MIL-53(Al) and catalysts were characterized by XRD, SEM, HRTEM,FT-IR and N2 adsorption/desorption techniques. The results showed that MIL-53(Al) was synthesized successfully, and the structure was unchanged during and after the preparation of the catalysts. The Pd nanoparticles(NPs) with an average particle size of 4.6 nm were uniformly dispersed on the MIL-53(Al). The catalyst exhibited good catalytic activity in the selective oxidation of liquid methanol to methyl formate. Under the conditions of 150 °C, 2 MPa O2 and solvent-free for5 h, the conversion of methanol could reach 60.3%, and the selectivity of methyl formate was up to 62.2%. In addition, the Pd/MIL-53(Al) bifunctional catalyst exhibited excellent stability and maintained high catalytic activity after five cycles.

关键词： MIL-53(Al) Pd Bifunctional catalyst Methanol methyl formate

Condensation reaction of formaldehyde and methyl formate catalyzed by a composite catalyst system

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2007年第7期18卷 811-813页

作者： Ke Bing Wang Gong Ying Wang Chengdu Institute of Organic Chemistry Chinese Academy of Sciences Chengdu 610041 China Graduate School of Chinese Academy of Sciences Beijing 100039 China

The condensation reaction of formaldehyde and methyl formate to form methyl glycolate and methyl methoxy acetate catalyzed by p-toluenesulfonic acid and different Lewis acid compounds has been investigated. The composite catalytic system consisting of p-toluenesulfonic acid and NiX2 （X = Cl, Br, I）, especially NiI2, exhibited a high catalytic performance for the condensation reaction, the total yield of MG and MMAc was up to 72.37%.

关键词： p-Toluenesulfonic acid Formaldehyde methyl formate methyl glycolate methyl methoxy acetate

Ordered mesoporous Cu-Ca-Zr:A superior catalyst for direct synthesis of methyl formate from syngas

在线全文

学校读者我要写书评

暂无评论

Carbon Resources Conversion 2018年第2期1卷 174-182页

作者： Jiahao Zhuang Bin Lu Fangna Gu Ziyi Zhong Fabing Su State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Zhongke Langfang Institute of Process Engineering Fenghua Road No.1Langfang Economic&Technical Development ZoneHebei Province 065001China Institute of Chemical and Engineering Sciences Agency for ScienceTechnology and Research(A*STAR)1 Pesek RoadJurong IslandSingapore 627833Singapore Institute of Industrial Chemistry and Energy Technology Shenyang University of Chemical TechnologyShenyang 110142China

It is still a big challenge to obtain both highly active and stable Cu-based catalysts for direct synthesis of methyl formate(MF)from *** address the issue,we have designed and synthesized a series of ternary Cu-Ca-Zr catalysts,namely,the ordered mesoporous Cu-Ca-Zr catalyst prepared by one-pot evaporation-induced self-assembly(EISA)method,and the supported CuO/CaO-ZrO_(2)catalysts by impregnating with copper precursor or by immobilizing copper *** the latter two catalysts,the ordered mesoporous CaO-ZrO_(2)support was also prepared by the EISA *** catalysts were characterized by techniques such as ICP,XRD,TEM,N2 isotherm adsorption-desorption,XPS and H2-TPR,and used for direct synthesis of *** results indicated that the catalyst prepared by onepot EISA method,in which the CuO species are highly dispersed in frame of CaO-ZrO_(2),exhibits much better activity and stability as compared with the other two catalysts with most of CuO located on the outer surface of the CaO-ZrO_(2)support,because the former has a higher specific surface area,enhanced synergistic effect and stronger interaction between the CaO-ZrO_(2)support and CuO active constituent.

关键词： methyl formate Direct synthesis Cu-based catalyst Ordered mesoporous Activity

Photopromoted methoxycarbonylation of olefin with methyl formate by Co(OAc)2

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 Chemical Letters 2007年第1期18卷 17-20页

作者： Ying Na Cui Jing Mei Yin Da Bin Gao Ying Ping Jia Guang Yun Zhou Shen Min Li Liaoning Key Laboratory of Bio-Organic Chemistry Dalian University Dalian 116622 China

The photopromoted methoxycarbonylation of olefin with methyl formate catalyzed by Co（OAc）2 at ambient conditions has been carried out. The results indicated that the reaction activity increased with the increasing temperature. methyl formate decomposed into CO and CH3OH firstly under irradiation, and then the methoxycarbonylation of olefin proceeded under catalysis of Co（OAc）2. The mechanism of methyl formate participating in the methoxycarbonylation is verified by the IR analysis and the labeling experiments of CDHOD and CH3^18OH.

关键词： Mcthoxycarbonylation methyl formate Olefin Photopromoted Cobalt acetate

Kinetics of Methanol Carbonylation to methyl formate Catalyzed by Sodium Methoxide

在线全文

学校读者我要写书评

暂无评论

Journal of Natural Gas Chemistry 2004年第4期13卷 225-230页

作者： LiangChen JianghongZhang PingNing YunhuaChen WenbingWu ResearchCenSerofC1ChemicalTechnology KunmingUniversiSyofScienceandTechnologyKunming650093China CollegeofScience KunmingUniversityofScienceandTechnologyKunming650093China

Kinetics of synthesis of methyl formate from carbon monoxide and methanol, using sodium methoxide as the catalyst and pyridine as the promoter in a batch reactor, was studied. Kinetic parameters such as the apparent reaction orders, the rate constant and the apparent activation energies were obtained. The experimental results showed that both the reaction orders with respect to CO and methanol equal to 1, the general reaction kinetic equation is (-r)=-dp(CO)/dt=k, p(CO).[MeOH], and the rate constant is k=8.82×10~6exp [-61.19×10~3/(R·T)] in the presence of pyridine. The apparent activation energies had decreased 6.44 kJ/mol and the rate constant had increased more than 1.5 times when pyridine was used as the promoter in the catalyst system.

关键词： carbon monoxide pyridine methanol methyl formate carbonylation kinetics