Reaction Kinetics, Mechanisms and Catalysis最新文献_第10页

Error estimation for non-linear singularly perturbed reaction–diffusion parabolic problems via element-free Galerkin method 通过无元素伽勒金方法估算非线性奇异扰动反应-扩散抛物问题的误差

IF 1.7 4区化学

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2024-04-27 DOI: 10.1007/s11144-024-02630-0

Jagbir Kaur, Vivek Sangwan, Rahul Kumar

{"title":"Error estimation for non-linear singularly perturbed reaction–diffusion parabolic problems via element-free Galerkin method","authors":"Jagbir Kaur, Vivek Sangwan, Rahul Kumar","doi":"10.1007/s11144-024-02630-0","DOIUrl":"10.1007/s11144-024-02630-0","url":null,"abstract":"<div>The current study aims to develop an error analysis for non-linear parabolic singularly perturbed reaction–diffusion problems using element-free Galerkin method. A robust numerical methodology is introduced based on combining the implicit Crank–Nicolson scheme for temporal derivatives and the element-free Galerkin (EFG) method for spatial derivatives. The moving least-squares (MLS) approximation has been employed to generate the shape functions. Essential boundary conditions have been enforced by the incorporation of the Lagrange multiplier method. Due to the presence of steep boundary layers in the solution of the considered problem, a piecewise-uniform layer-adapted Shishkin’s technique has been used to generate nodal points at the transition point. The stability and error analysis of the present method on a discrete (L^{2}-)norm is analyzed in an innovative theoretical framework. The (epsilon)-uniform convergency of the fully-discrete EFG method is shown to be (mathcal {O}(tau ^{2}+d_{s}^{m})), where (tau) and (d_{s}^{m}) are the time step size and size of the influence domain, respectively. The Lagrange multiplier method has been incorporated to deal with the implementation of essential boundary conditions. Lastly, a few numerical experiments are performed to validate the theoretical results and verify the computational consistency and robustness of the proposed scheme. The (L_{infty }) errors and the convergence rate have been presented.</div>","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140804577","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

H2O2 decomposition on X12Y12 (X = B, Al, Ga and Y = N, P) nanocage catalysts: a density functional theory study X12Y12（X = B、Al、Ga，Y = N、P）纳米笼催化剂上的 H2O2 分解：密度泛函理论研究

IF 1.7 4区化学

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2024-04-19 DOI: 10.1007/s11144-024-02632-y

Xin Lian, Wenhong Zeng, Xinlin Tang, Haiyue Liao, Wenlong Guo, Yunhuai Zhang, Guangyong Gao

引用次数: 0

Highly efficient selective hydrogenation of isophthalonitrile to M-xylenedimethylamine over Co–CaO/g-C3N4 without alkaline additives 在不含碱性添加剂的 Co-CaO/g-C3N4 上高效选择性氢化间苯二甲腈生成间二甲胺

IF 1.7 4区化学

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2024-04-16 DOI: 10.1007/s11144-024-02628-8

Hang Gao, Yuqin Zhu, He’an Luo, Yang Lv, Pingle Liu

引用次数: 0

Modified Friedman isoconversional kinetic method for effective activation energies of waste tires rubber pyrolysis 改良弗里德曼等转化动力学法计算废轮胎橡胶热解的有效活化能

IF 1.7 4区化学

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2024-04-13 DOI: 10.1007/s11144-024-02629-7

Zhen Zhang, Xiaoguang Zheng, Junmeng Cai

引用次数: 0

Correction: Synthesis of TiO2–Fe/Fe3O4 photocatalyst using iron rusty waste as Fe source for removal Pb(II) in water media under visible light with good separable property 更正：利用铁锈废料作为铁源合成具有良好分离性能的 TiO2-Fe/Fe3O4 光催化剂，用于在可见光下去除水介质中的铅(II)

IF 1.7 4区化学

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2024-04-13 DOI: 10.1007/s11144-024-02620-2

Endang Tri Wahyuni, Syafriyanti Annur, Adytya Wijayana, Eka Pratista, Early Zahwa Alharissa

引用次数: 0

The oxidation of potassium hexacyanoferrate(II)trihydrate by potassium dibromodicyanoaurate(III) in acidic solution: a kinetic study 二溴二氰基金酸钾（III）在酸性溶液中氧化三水六氰基铁酸钾（II）：动力学研究

IF 1.7 4区化学

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2024-04-12 DOI: 10.1007/s11144-024-02625-x

Jannie C. Swarts, C. Robert Dennis

{"title":"The oxidation of potassium hexacyanoferrate(II)trihydrate by potassium dibromodicyanoaurate(III) in acidic solution: a kinetic study","authors":"Jannie C. Swarts, C. Robert Dennis","doi":"10.1007/s11144-024-02625-x","DOIUrl":"10.1007/s11144-024-02625-x","url":null,"abstract":"<div>The reduction of the dibromodicyanoaurate(III) ion by hexacyanoferrate(II)trihydrate was studied in an acidic medium. The reaction was first order in both Au(CN)2Br2− and Fe(CN)64− and a second order rate constant of k2 = 255 ± 5 M−1 s−1 at [H+] = 2.041 × 10−4 M, an ionic strength of 0.51 M (NaBr) and 20.0 ± 0.1 °C was found for the reaction. The reaction rate decreases with increasing [H+] in the region 0.0004 ≤ [H+] ≤ 0.065 M. An equilibrium constant of Ka = (3.00 ± 0.01) × 10−3 M (pKa = 2.52) at 20.0 ± 0.1 °C was found for the deprotonation of H2Fe(CN)62−. Activation parameters of ∆H# = 47.8 ± 0.9 kJ mol−1 and ∆S# = −37 ± 3 J K−1 mol−1 have been obtained by a least squares fit of temperature data directly to the Eyring equation.<h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11144-024-02625-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140565566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced photodegradation of sertraline using a hybrid-metal–organic framework composite photocatalyst: optimization and kinetic study 利用混合金属有机框架复合光催化剂增强舍曲林的光降解：优化和动力学研究

IF 1.7 4区化学

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2024-04-09 DOI: 10.1007/s11144-024-02597-y

Zinat Gordi, Tahere Ghanbari

{"title":"Enhanced photodegradation of sertraline using a hybrid-metal–organic framework composite photocatalyst: optimization and kinetic study","authors":"Zinat Gordi, Tahere Ghanbari","doi":"10.1007/s11144-024-02597-y","DOIUrl":"10.1007/s11144-024-02597-y","url":null,"abstract":"<div>This study aimed to synthesize and evaluate the performance of a series of photocatalysts, including Co-MOF, Ni-MOF, bimetallic Co, Ni-MOF, and Ni-MOF on Co-MOF, for the efficient photodegradation of the antidepressant drug sertraline. The photocatalysts were synthesized using the hydrothermal method, and their effectiveness in sertraline degradation was compared. Results revealed that Ni-MOF on Co-MOF exhibited the highest percentage of photodegradation, surpassing other photocatalysts, with bimetallic Co, Ni-MOF ranking second. To further optimize the process, response surface methodology based on central composite design was employed to determine the influential factors and their interactions. Under the established optimum conditions, including photocatalyst amount (75 mg), pH (5.5), sertraline concentration (117 mg L−1), and hydrogen peroxide percentage (1.8%), the photodegradation process utilizing Ni-MOF on Co-MOF achieved remarkable results. Kinetic analysis using a pseudo-first-order model demonstrated a rate constant of 0.019 ± 0.001 min−1 and a half-life of 36.28 min. These findings underscore the efficiency and effectiveness of Ni-MOF on Co-MOF as a superior photocatalyst for the degradation of sertraline, offering valuable insights into process optimization and kinetics for potential applications in wastewater treatment and environmental remediation.</div>","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140565567","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

Synthesis of Sn-based nanocomposites using waste polyethylene terephthalate (PET) for the electrochemical reduction of CO2 to formate 利用废弃聚对苯二甲酸乙二醇酯 (PET) 合成锡基纳米复合材料，用于电化学还原 CO2 到甲酸盐

IF 1.7 4区化学

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2024-04-09 DOI: 10.1007/s11144-024-02623-z

Shweta Shukla, Ramasamy Karvembu

{"title":"Synthesis of Sn-based nanocomposites using waste polyethylene terephthalate (PET) for the electrochemical reduction of CO2 to formate","authors":"Shweta Shukla, Ramasamy Karvembu","doi":"10.1007/s11144-024-02623-z","DOIUrl":"10.1007/s11144-024-02623-z","url":null,"abstract":"<div>Terephthalic acid (TPA) was recovered by alkaline hydrolysis of waste polyethylene terephthalate (PET) bottles. TPA recovered was used to prepare Sn-based catalyst by solvothermal method. For comparison, commercial TPA was also used to prepare Sn-based catalyst. The catalysts were used for the electrochemical reduction of CO2 to formate. Both the catalysts were found to possess nanoflake morphology, and were highly porous in nature with Brunauer–Emmett–Teller (BET) surface area of 211.4 and 239.4 m2/g for commercial and PET derived TPA-based Sn catalysts, respectively. The catalyst made from the waste PET bottles derived TPA was found to be more effective than the one obtained from the commercial TPA. The Faradaic efficiency obtained for the formation of formate was 68.4% at potential − 1.8 V (vs Ag/AgCl) and current density of 13.5 mA/cm2, when catalyst was synthesized using waste PET derived TPA. High activity of the electrocatalysts was attributed to higher capacitance, and lower resistance of the catalysts.<h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140565569","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

Optical properties of Bi2Fe4O9/Ag3PO4 for rapid degradation of Rhodamine B 用于快速降解罗丹明 B 的 Bi2Fe4O9/Ag3PO4 的光学特性

IF 1.7 4区化学

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2024-04-09 DOI: 10.1007/s11144-024-02626-w

Adel Khen, Toufik Hadjersi, Noureddine Brihi, Madjid Ifires, Fatsah Moulai, Atmane Djermoune, Amar Manseri

{"title":"Optical properties of Bi2Fe4O9/Ag3PO4 for rapid degradation of Rhodamine B","authors":"Adel Khen, Toufik Hadjersi, Noureddine Brihi, Madjid Ifires, Fatsah Moulai, Atmane Djermoune, Amar Manseri","doi":"10.1007/s11144-024-02626-w","DOIUrl":"10.1007/s11144-024-02626-w","url":null,"abstract":"<div>This work focuses on the synthesis of Bi2Fe4O9/Ag3PO4 composites with different Bi2Fe4O9 contents to remove the Rhodamine B (RhB) dye pollutant. The obtained composites were characterized by scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, Photoluminescence and UV–Vis spectrophotometry. The 5Bi2Fe4O9/Ag3PO4 catalyst with 5% Bi2Fe4O9 loading exhibited the high photocatalytic performance with degradation efficiency of 97.91% after 12 min under visible light irradiation. Photoluminescence and UV–Vis analysis showed that 5Bi2Fe4O9/Ag3PO4 has the best separation of photogenerated e−/h+ pairs and light absorption. The catalyst exhibited a good selectivity toward tartrazine and methylene blue. The cycling experiment revealed that 5Bi2Fe4O9/Ag3PO4 catalyst has a good stability after 4 runs. The results of trapping radical experiments indicated that h+ charge carriers were the main species involved in the RhB photodegradation process which was supported by a Z-scheme electron transfer mechanism.</div>","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140565479","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 SO2 on the soot oxidation activity of flame spray pyrolysis-made manganese oxide catalyst in gasoline model exhaust 二氧化硫对火焰喷射热解制造的氧化锰催化剂在汽油模型废气中烟尘氧化活性的影响

IF 1.7 4区化学

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2024-04-06 DOI: 10.1007/s11144-024-02618-w

Markus Werther, Christian Singer, Alexander Gross, Sven Kureti, Juan Carlos Martínez-Munuera, Avelina García-García

{"title":"Effect of SO2 on the soot oxidation activity of flame spray pyrolysis-made manganese oxide catalyst in gasoline model exhaust","authors":"Markus Werther, Christian Singer, Alexander Gross, Sven Kureti, Juan Carlos Martínez-Munuera, Avelina García-García","doi":"10.1007/s11144-024-02618-w","DOIUrl":"10.1007/s11144-024-02618-w","url":null,"abstract":"<div>This study deals with the effect of SO2 on the soot oxidation activity of flame spray pyrolysis-prepared manganese oxide in gasoline model exhaust. The catalyst was exposed to 15 and 30 ppm SO2 at 250 °C and was characterized by N2 physisorption, SO2-TPD, O2-TPD, DRIFTS, XPS and PXRD. It was shown that the SO2 adsorption results in the formation of surface sulfate, while the uptake increased from 26 to 45 μmol/g with growing sulfur content of the model exhaust. The sulfur adsorption reduces the mobility and availability of oxygen on the catalyst thus inhibiting the oxygen transport from gas phase over the catalyst to the contact points of the soot. Consequently, the soot oxidation activity, investigated with tight contact blends of catalyst and soot, decreases with inclining amount of sulfate. Finally, the sulfate species were mostly removed by thermal treatment at 705 °C, which additionally provoked catalyst sintering. As a result, the catalytic performance of the de-sulfated catalyst was slightly lower compared to the sulfated sample.</div>","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11144-024-02618-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140565480","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0