Kinetics and Catalysis最新文献

Low-Temperature O3-Catalytic Oxidation of Methane on Cobalt-Containing Zeolite Catalysts 含钴沸石催化剂对甲烷的低温 O3 催化氧化作用

IF 1.1 4区化学

Kinetics and Catalysis Pub Date : 2024-09-04 DOI: 10.1134/s0023158424601736

D. A. Bokarev, I. V. Paramoshin, S. A. Kanaev, G. N. Baeva, A. V. Rassolov, A. Yu. Stakheev

引用次数: 0

Vinyl Iodide Homocoupling Catalyzed by Platinum(II) Iodo Complexes: A DFT Study 铂(II)碘配合物催化的碘化乙烯基同偶联反应：DFT 研究

IF 1.1 4区化学

Kinetics and Catalysis Pub Date : 2024-09-04 DOI: 10.1134/s0023158424601700

T. V. Krasnyakova, D. V. Nikitenko, A. A. Gusev, V. G. But’ko, S. A. Mitchenko

引用次数: 0

Mass Spectrometric Study of Cations in a Non-Sooting Ethylene Flame 非膨胀乙烯火焰中阳离子的质谱研究

IF 1.1 4区化学

Kinetics and Catalysis Pub Date : 2024-09-04 DOI: 10.1134/s0023158424601670

A. V. Cherepanov, D. A. Knyazkov

{"title":"Mass Spectrometric Study of Cations in a Non-Sooting Ethylene Flame","authors":"A. V. Cherepanov, D. A. Knyazkov","doi":"10.1134/s0023158424601670","DOIUrl":"https://doi.org/10.1134/s0023158424601670","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3>Understanding the kinetics and mechanism of formation of charged species in flames is of great importance for the development of ion-sensitive combustion control technologies. The development of predictive models involving ion-molecular reactions, however, is hampered by the lack of experimental data. The paper presents the results of our study of the spatial distribution of cations naturally occurring in a fuel-rich, non-sooting, laminar premixed ethylene/oxygen/argon flame using flame sampling molecular beam mass spectrometry. Particular attention is paid to the interpretation of the obtained mass spectra of cations, which are distorted by the influence of the sampling probe. The reliability of the proposed interpretation of the spectra is confirmed by consistency between the cationic and neutral flame structures. The study focused on cations with the general formula CxH(_{y}^{ + }) (53 < m/z < 165), actively formed in the reaction zone of the fuel-rich flame. Two main mechanisms of their formation are discussed: proton transfer from HCO+ and H3O+ (key cations of flame) to neutral intermediates whose mass is 1 amu smaller and gradual increase in the mass of ions in the reactions of lighter CxH(_{y}^{ + }) ions with neutral intermediates having high concentrations in the flame (acetylene, diacetylene, propylene, propyne, etc.).","PeriodicalId":682,"journal":{"name":"Kinetics and Catalysis","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142200007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Kinetic Coupling of Steady-State Dry Reforming of Methane and Self-Oscillating Partial Oxidation of Methane over Nickel 甲烷在镍上的稳态干法重整与甲烷的自振荡部分氧化的动力学耦合

IF 1.1 4区化学

Kinetics and Catalysis Pub Date : 2024-09-04 DOI: 10.1134/s002315842460175x

V. Yu. Bychkov, Yu. P. Tulenin, Yu. A. Gordienko, O. N. Sil’chenkova, V. N. Korchak

{"title":"Kinetic Coupling of Steady-State Dry Reforming of Methane and Self-Oscillating Partial Oxidation of Methane over Nickel","authors":"V. Yu. Bychkov, Yu. P. Tulenin, Yu. A. Gordienko, O. N. Sil’chenkova, V. N. Korchak","doi":"10.1134/s002315842460175x","DOIUrl":"https://doi.org/10.1134/s002315842460175x","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3>The occurrence of dry reforming of methane (DRM) in a steady-state mode and partial oxidation of methane (POM) in a self-oscillating mode over a nickel foil sample and the simultaneous occurrence of these two reactions have been studied. It has been shown that during the cooccurrence of the DRM and POM reactions, a kinetic coupling of these reactions takes place; it is evident as a change in the self-oscillation period and a significant acceleration of the DRM reaction in certain phases of the self-oscillation cycle compared with the DRM rate over this Ni sample in a steady-state mode. The DRM acceleration effect is observed in a temperature range of 600–750°C. The maximum increase in the CO2 conversion value averaged over the oscillation period is a factor of 2.6 at a temperature of 700°C for a feed gas mixture composition of CH4 : CO2 = 1 : 1 + 3.5% O2. In addition, the effect of O2 concentration in a range of 0.5–3.5% on the increase in the DRM rate has been studied. An interpretation of the observed effects has been proposed.","PeriodicalId":682,"journal":{"name":"Kinetics and Catalysis","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142200011","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Stabilizing Ligand on the Catalytic Properties of Copper Sulfide Nanoclusters in CO Oxidation 稳定配体对硫化铜纳米簇氧化 CO 催化特性的影响

IF 1.1 4区化学

Kinetics and Catalysis Pub Date : 2024-09-04 DOI: 10.1134/s0023158424601785

P. S. Bandurist, D. A. Pichugina

引用次数: 0

A Kinetic Study of the Nonisothermal Pyrolysis of Wood 木材非等温热解动力学研究

IF 1.1 4区化学

Kinetics and Catalysis Pub Date : 2024-09-04 DOI: 10.1134/s0023158424601657

S. V. Vasilevich, A. V. Mitrofanov

{"title":"A Kinetic Study of the Nonisothermal Pyrolysis of Wood","authors":"S. V. Vasilevich, A. V. Mitrofanov","doi":"10.1134/s0023158424601657","DOIUrl":"https://doi.org/10.1134/s0023158424601657","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3>Results of a kinetic study of the pyrolysis of woody biomass (Quercus robur) under conditions of continuous heating to a temperature of 873 K at a constant rate of 1.25, 2.5, 5, and 10 K/min have been discussed. An integral method has been used to describe the reaction mechanism and determine the macrokinetic parameters. It has been found that, from a phenomenological point of view, the averaged woody biomass pyrolysis reaction under test conditions corresponds to a three-dimensional diffusion model (1.25 K/min), a model described by the third-order reaction equation (2.5, 5 K/min), and a one-dimensional diffusion model (10 K/min). In this case, the relative standard deviation of the conversion values calculated using this equation from the test data is <11.2%. The division of the averaged reaction into three stages (first stage is completed at a temperature of 390 K; the second, at 579 K; the third, at the completion of the conversion process) leads to agreement between the calculated degree of degradation of the studied biomass samples and the test values in a range of the degree of degradation of 0–1. Although the relative standard deviation does not exceed 3.5%, the division of the averaged reaction into stages does not exclude discrepancies in the values of the determined macrokinetic parameters. It has been shown that the choice of the model that provides the best description of the wood conversion process depends on heating rate during the tests. Owing to this dependence, the macrokinetic parameter values significantly differ from each other. Taking this fact into account, it can be concluded that the selected models and calculated macrokinetic parameters are of a formal nature and cannot be thought of as physicochemical characteristics that are universal with respect to the subject of research. Discrepancies in calculations of macrokinetic parameters that are caused by the effect of heating rate can be eliminated by studying the kinetics of conversion under isothermal conditions (at a constant temperature).","PeriodicalId":682,"journal":{"name":"Kinetics and Catalysis","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142200008","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hydrogenation of 1,3-Butadiene over Nickel-Containing Carbon Xerogels 在含镍碳Xerogels上氢化1,3-丁二烯

IF 1.1 4区化学

Kinetics and Catalysis Pub Date : 2024-09-04 DOI: 10.1134/s0023158424601773

G. B. Veselov, Yu. V. Shubin, A. A. Vedyagin

引用次数: 0

Influence of Support Properties on the State and Activity of Supported Palladium in the Decomposition Reaction of Hydrazine Monohydrate 支撑特性对支撑钯在一水肼分解反应中的状态和活性的影响

IF 1.1 4区化学

Kinetics and Catalysis Pub Date : 2024-09-04 DOI: 10.1134/s0023158424601748

V. A. Matyshak, O. N. Silchenkova, A. N. Ilichev, M. Ya. Bykhovsky, V. Yu. Bychkov

引用次数: 0

Kinetics of the Interaction of Acrylonitrile with Cyclopentadiene in the Diels–Alder Reaction in the Presence of Synthetic Zeolites 合成沸石存在下二元-阿尔德反应中丙烯腈与环戊二烯的相互作用动力学