Reaction Kinetics, Mechanisms and Catalysis最新文献_第9页

Producing a monolithic catalyst for the catalytic oxidization of dioxins by comparing extrusion and coating methods 通过对挤压法和镀膜法的比较，制备了二恶英催化氧化的整体催化剂

IF 1.7 4区化学

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2024-10-25 DOI: 10.1007/s11144-024-02754-3

Wanting Chen, Linmin Lao, Yihuan Zhang, Yang Yue, Guangren Qian, Jia Zhang

{"title":"Producing a monolithic catalyst for the catalytic oxidization of dioxins by comparing extrusion and coating methods","authors":"Wanting Chen, Linmin Lao, Yihuan Zhang, Yang Yue, Guangren Qian, Jia Zhang","doi":"10.1007/s11144-024-02754-3","DOIUrl":"10.1007/s11144-024-02754-3","url":null,"abstract":"<div>Coating and extrusion methods were compared in lab-scale catalytic decomposition of chlorobenzene (CB) to increase utilization of the powdered VW/TiO2 catalyst. As a result, when the VW/TiO2 was coated on a cordierite by silicone gel, the obtained monolithic catalyst removed 1449 ppm g−1 (per gram of actual coated VW/TiO2) of CB at 300 °C. Since the monolithic catalyst obtained a smaller conversion (68%) than the powdered VW/TiO2 (87%), a mechanism investigation revealed the reasons. On one hand, the binder silicon covered oxygen vacancies and decreased the reductive capacity of the VW/TiO2. On the other hand, the coating process, such as dispersion in gel and afterward calcination, also decreased the redox property. However, these disadvantages were inevitable, and the put-forward coating method still showed a better catalytic performance than a commercial honeycomb catalyst, which only removed 237 ppm g−1 of CB at 300 °C. This work supplies various potential coating methods for researchers, who would like to increase the applicability of their newly developed catalysts.</div>","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":"138 2","pages":"791 - 803"},"PeriodicalIF":1.7,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143717001","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

Elucidating the impact of sodium azide on the thermal and combustion characteristics of boron-based fuel-rich propellants 阐述叠氮化钠对硼基富燃料推进剂热特性和燃烧特性的影响

IF 1.7 4区化学

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2024-10-24 DOI: 10.1007/s11144-024-02748-1

Mohammed El Amin Facih, Moulai Karim Boulkadid, Sabri Touidjine, Samir Belkhiri, Manel Nourine

引用次数: 0

Barium-doped ZnO nanorods fabricated via Piper nigrum leaf extract: a green route for enhanced photocatalytic efficiency 胡椒叶提取物制备钡掺杂ZnO纳米棒：提高光催化效率的绿色途径

IF 1.7 4区化学

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2024-10-24 DOI: 10.1007/s11144-024-02742-7

Muhammad Maqsood Ahmad Khan, Shoaib Siddique, Muhammad Khalil Ahmad Khan, Bo-Tau Liu, Aniza Latif

{"title":"Barium-doped ZnO nanorods fabricated via Piper nigrum leaf extract: a green route for enhanced photocatalytic efficiency","authors":"Muhammad Maqsood Ahmad Khan, Shoaib Siddique, Muhammad Khalil Ahmad Khan, Bo-Tau Liu, Aniza Latif","doi":"10.1007/s11144-024-02742-7","DOIUrl":"10.1007/s11144-024-02742-7","url":null,"abstract":"<div>Herein, for the very first time, barium-doped ZnO nanorods (Ba-ZnO NRs) with varying Ba concentration were fabricated using black pepper (Piper nigrum) leaf extract. X-ray diffraction (XRD) analysis revealed that the studied powder exhibits wurtzite crystal structure, and scanning electron microscope (SEM) image displays the rod-like morphology, the Ba doping changes surface roughness. As dopant content (Ba) is increased, the energy band gap decreases, which can be attributed to variations in crystallite size and substitutions of the dopant ions. In photocatalytic activity, Ba-ZnO NRs degraded antibiotic ciprofloxacin (CIP) and rhodamine B (RhB) dye more efficiently than pure ZnO NRs. Notably, CIP antibiotic and RhB dye showed 95.44 and 98.94% decomposition efficiency in 80 and 35 min under visible light, respectively, with an estimated rate constant of 0.0383 and 0.1188 min−1. Based on the results of this study, Ba-ZnO NRs show promising potential for advanced wastewater treatment.</div>","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":"138 1","pages":"413 - 431"},"PeriodicalIF":1.7,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143404269","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

Effects of ytterbium on potassium titanate for enhanced photocatalytic degradation of Acid red 1 镱对钛酸钾光催化降解酸性红的影响

IF 1.7 4区化学

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2024-10-24 DOI: 10.1007/s11144-024-02750-7

Shuai Zhang, Wenjie Zhang, Zhao Lv

{"title":"Effects of ytterbium on potassium titanate for enhanced photocatalytic degradation of Acid red 1","authors":"Shuai Zhang, Wenjie Zhang, Zhao Lv","doi":"10.1007/s11144-024-02750-7","DOIUrl":"10.1007/s11144-024-02750-7","url":null,"abstract":"<div>A sol–gel method was used to prepare Ybn-K2Ti6O13 to show ytterbium’s effects on potassium titanate’s properties. The crystallite sizes of monoclinic K2Ti6O13 phase for K2Ti6O13, Yb0.15-K2Ti6O13 and Yb0.3-K2Ti6O13 were calculated to be 25.5, 44.9 and 41.1 nm. The specific surface area and pore volume of K2Ti6O13 were small, and Yb0.15-K2Ti6O13 had the largest specific surface area (9.10 m2/g) and pore volume (0.0193 cm3/g). The photoluminescence intensity reduced in the sequence: K2Ti6O13, Yb0.3-K2Ti6O13 and Yb0.15-K2Ti6O13. The photocatalytic activities of Ybn-K2Ti6O13 were much better than that of K2Ti6O13, and the degradation efficiencies in 80 min for Yb0.15-K2Ti6O13, Yb0.3-K2Ti6O13 and K2Ti6O13 were determined to be 89.6%, 69.9% and 56.3%. The 600 mg/L dosage of Yb0.15-K2Ti6O13 was suitable for the photocatalytic reaction.</div>","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":"138 2","pages":"1055 - 1066"},"PeriodicalIF":1.7,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143716958","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

In−depth insights into the kinetic and thermodynamic parameters of synergistic coffee residue pyrolysis of sugar industry sludge and biochar characterization 深入了解咖啡渣协同热解制糖工业污泥的动力学和热力学参数及生物炭表征

IF 1.7 4区化学

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2024-10-23 DOI: 10.1007/s11144-024-02740-9

Tongxi Mo, Hairong Mo, Yuanjie Wu, Haitao Liang, Hongming Xiong, Linlin Wang

{"title":"In−depth insights into the kinetic and thermodynamic parameters of synergistic coffee residue pyrolysis of sugar industry sludge and biochar characterization","authors":"Tongxi Mo, Hairong Mo, Yuanjie Wu, Haitao Liang, Hongming Xiong, Linlin Wang","doi":"10.1007/s11144-024-02740-9","DOIUrl":"10.1007/s11144-024-02740-9","url":null,"abstract":"<div>This study elucidated the thermal behavior, biochar, kinetics and thermodynamics parameters of sugar industry sludge (SS), coffee residue (CR) and their mixtures (SC31: mass ratio of 3:1 and SC21: mass ratio of 2:1) using high‐precision thermogravimetric analysis (TGA) and Fourier transform infrared (FTIR) spectroscopy, combined with advanced non−isothermal conversion methods. The ultimate analysis reveals that the feedstocks contain high carbon content and low levels of nitrogen and sulfur, underscoring their potential as sources for producing clean carbon resources. The TGA result indicates that (co-)pyrolysis proceed via a three−stage process, encompassing moisture removal, devolatilization, and char formation. The kinetic results demonstrated that the non−isothermal conversion methods have good agreement on kinetic parameters, the average Ea of sugar industry sludge, coffee residue, CS31 and SC21 were 241.18, 207.35, 247.89 and 218.36 kJ/mol, respectively. At a mass ratio of sugar industry sludge to coffee residue at 2:1, the experimental Ea dips below its theorized value. SS and CR (co-)pyrolysis follows the Avrami−Erofeev (SC31) and power−law (SC21) mechanisms. The thermodynamic results indicate that co−pyrolysis exhibits higher reactivity. FTIR findings revealed that SS and CR had similar functional groups and that the co−pyrolysis chars not only incorporated ketones, aldehydes and acids, but also H2O and CO2. SEM images underscore the potential of co−pyrolyzed biochar as a significant feedstock for fabricating porous nanosheet biochar.<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":"138 1","pages":"143 - 162"},"PeriodicalIF":1.7,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143404253","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 adsorption studies of methylene blue and crystal violet dyes removal in single and competitive systems using lemon peels/activated carbon/alginate composite 柠檬皮/活性炭/海藻酸盐复合材料对亚甲基蓝和结晶紫染料在单一和竞争体系中的动力学吸附研究

IF 1.7 4区化学

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2024-10-23 DOI: 10.1007/s11144-024-02736-5

Amina Aichour, Hakim Djafer Khodja, Hassina Zaghouane-Boudiaf, Cesar Viseras Iborra, Manuel Sanchez Polo

{"title":"Kinetic adsorption studies of methylene blue and crystal violet dyes removal in single and competitive systems using lemon peels/activated carbon/alginate composite","authors":"Amina Aichour, Hakim Djafer Khodja, Hassina Zaghouane-Boudiaf, Cesar Viseras Iborra, Manuel Sanchez Polo","doi":"10.1007/s11144-024-02736-5","DOIUrl":"10.1007/s11144-024-02736-5","url":null,"abstract":"<div>Efficient hybrid multifunctional composite was elaborated in order to eliminate cationic dyes (methylene blue and crystal violet). Lemon peels-biomass-Derived and activated carbon were encapsulated with calcium alginate in order to obtain the hybrid composite. Several analyses were used to characterize the composite such as Elementary analysis, FTIR, PXRD, SEM, BET, and pHPZC. Adsorption studies were investigated according to different operational conditions. High adsorption stability via pH was observed from 5 to 11. MB adsorption process was found to be spontaneous and exothermic nature, proven by the negative value of ΔH° and ΔG°. Isotherm study revealed that the experimental adsorbed Methylene blue amount on the composite reached 1130.97 mg/g. Langmuir, Freundlich, and Toth models were applied to analyze isotherm adsorption. Langmuir and Toth models show the highest correlation coefficients R2 > 0.985 and R2 > 0.994 respectively. Binary equilibrium study showed that the presence of CV reduces MB removal indicating the competitiveness between the two cationic dyes. Reusability study of composite was investigated through six cycles of adsorption–desorption. Adsorption performance was decreased with increase on cycle’s numbers. Prepared new hybrid composite is considered as highly recyclable and efficient adsorbent for organic dyes, it contributes to reduce more the process cost.</div>","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":"138 1","pages":"303 - 322"},"PeriodicalIF":1.7,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143404252","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

Reactivity and philicity of phthalimide-N-oxyl and benzotriazol-N-oxyl radicals in addition reactions to vinyl compounds 邻苯二胺- n -氧自由基和苯并三唑- n -氧自由基与乙烯基化合物加成反应的反应性和亲性

IF 1.7 4区化学

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2024-10-23 DOI: 10.1007/s11144-024-02738-3

I. O. Opeida, O. V. Kushch, M. O. Kompanets, I. O. Hordieieva, A. N. Shendrik

{"title":"Reactivity and philicity of phthalimide-N-oxyl and benzotriazol-N-oxyl radicals in addition reactions to vinyl compounds","authors":"I. O. Opeida, O. V. Kushch, M. O. Kompanets, I. O. Hordieieva, A. N. Shendrik","doi":"10.1007/s11144-024-02738-3","DOIUrl":"10.1007/s11144-024-02738-3","url":null,"abstract":"In this paper, we report the comparative investigation of reactivity of phthalimide-N-oxyl (PINO) and benzotriazole-N-oxyl (BTNO) radicals toward double bonds of vinyl compounds. The rate constants for radical addition (kadd) to alkenes were determined experimentally. It has been shown that kadd for PINO is significantly higher than for BTNO, and the reactivity of olefines increases in the series: CH2 = CHCN < CH2 = CHCOOH < CH2 = CHC(O)OCH3 < CH2 = CHC(O)NH2 < CH2 = C(CH3)C(O)OCH3 < CH2 = CHC6H5 < CH2 = C(CH3)C6H5. The plots of the dependence of the addition rate constants on the ionization potential of vinyl compounds gave a good linear correlation, which indicates the electrophilicity of the radicals and the significant influence of polar effects in the reactions studied. Polar effects operate at the level of the transition state, which is characterized by the transfer of electron from the alkene to the radical and the generation of a negative charge on the oxygen atom. The contribution of the polar factor to the energy of the transition state of reactions is adequately described by the Fukui–Klopman–Salem equation. The calculated indices of global electrophilicity of radicals (ωo) confirm the electrophilic nature of PINO and BTNO, however ωo BTNO (ωo = 4.79 eV) is higher than that of PINO (ωo = 4.00 eV). At the same time, the calculated spin density on the N–O fragment and O atom of the PINO radical is significantly higher than that of BTNO, which may be the reason for the different reactivity and selectivity of the radicals.","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":"138 1","pages":"71 - 90"},"PeriodicalIF":1.7,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143404254","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

Catalytic oxidation of phenol with H2O2 over VOx/GaSiAlOx catalyst VOx/GaSiAlOx催化剂上H2O2对苯酚的催化氧化

IF 1.7 4区化学

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2024-10-21 DOI: 10.1007/s11144-024-02747-2

Xiaorui Wang, Yanwei Li, Peng Dong

引用次数: 0

Characteristics of integral plasma-fluidized bed and preparation of Mo-based catalysts for sulfur-resistant methanation 整体等离子体流化床特性及钼基耐硫甲烷化催化剂的制备

IF 1.7 4区化学

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2024-10-21 DOI: 10.1007/s11144-024-02735-6

Baowei Wang, Jiangzhou Kong, Xiaoyan Li

引用次数: 0

Construction of (001)-TiO2/g-C3N4 heterojunction for enhanced photocatalytic degradation of methylene blue （001）-TiO2/g-C3N4异质结的构建增强光催化降解亚甲基蓝

IF 1.7 4区化学

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2024-10-21 DOI: 10.1007/s11144-024-02739-2

Ran Gao, Wensong Lin, Huanxia Lin, Yong He, Xin Mai, Yeheng Zhang

{"title":"Construction of (001)-TiO2/g-C3N4 heterojunction for enhanced photocatalytic degradation of methylene blue","authors":"Ran Gao, Wensong Lin, Huanxia Lin, Yong He, Xin Mai, Yeheng Zhang","doi":"10.1007/s11144-024-02739-2","DOIUrl":"10.1007/s11144-024-02739-2","url":null,"abstract":"<div>The (001)-TiO2 (001 crystal plane-oriented titanium oxide) nanoparticles was precipitated on the surface of as-prepared graphitic carbon nitride (g-C3N4) and the composites with heterogeneous structures were manufactured. Methylene blue (MB) as the target pollutant was used to evaluate the performance of the composite photocatalysts. The decrease of the band gap, suppression of electron–hole recombination and the increased specific surface area of the composites enhance the the photocatalytic degradation performance. The mass ratio of (001)-TiO2 and g-C3N4 in the composites with the best degradation performance for MB was found to be 1:5, which was denoted as TCN2. The rate for MB to be degraded after exposure to light for 60 min was 95% by TCN2. The degradation rate constant k of TCN2 is 0.0442 min−1, which is 7 times that of (001)-TiO2 and 4 times that of g-C3N4. After four rounds of photocatalytic experiments, the photocatalytic efficiency of TCN2 remains at a high level. The composition and microstructure of the materials were characterized by XRD, XPS, FTIR, SEM, TEM, and BET. The optical properties and degradation mechanism of the material were investigated by PL, DRS, PEC, EIS, and active substance capture experiments. The mechanism of MB photocatalytic degradation was proposed.</div>","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":"138 1","pages":"455 - 469"},"PeriodicalIF":1.7,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143404205","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