Catalysis Letters最新文献_第4页

MoO3 Catalyst Supported on Micro-Mesoporous Structure for Biodiesel Production

IF 2.3 4区化学

Catalysis Letters Pub Date : 2024-12-12 DOI: 10.1007/s10562-024-04901-w

Joyce S. B. Figueiredo, Nayara E. Souza, Bruno T. S. Alves, André M. Silva, Bianca V. S. Barbosa, Noemi R. C. Huaman, Romualdo R. Menezes, José J. N. Alves

{"title":"MoO3 Catalyst Supported on Micro-Mesoporous Structure for Biodiesel Production","authors":"Joyce S. B. Figueiredo, Nayara E. Souza, Bruno T. S. Alves, André M. Silva, Bianca V. S. Barbosa, Noemi R. C. Huaman, Romualdo R. Menezes, José J. N. Alves","doi":"10.1007/s10562-024-04901-w","DOIUrl":"10.1007/s10562-024-04901-w","url":null,"abstract":"<div><p>This study reports the synthesis and characterization of x_MoO<sub>3</sub>/H-Z/S micro-mesoporous catalyst, which combines the properties of ZSM-5 and SBA-15, as well as its performance for biodiesel production from the transesterification of soybean oil. ZSM-5 was added to the SBA-15 synthesis gel, calcinated, and molybdenum trioxide (MoO<sub>3</sub>) was incorporated by incipient wetness using ammonium heptamolybdate salt [(NH<sub>4</sub>)<sub>6</sub>Mo<sub>7</sub>O<sub>24</sub>‧4H<sub>2</sub>O] as a metal precursor. The diffractograms and micrographics showed a micro-mesoporous structure of the support with the characteristic peaks of MoO<sub>3</sub>. The textural analysis showed that increasing the MoO<sub>3</sub> content decreases the specific area and the pore diameter of the catalysts. The Raman spectrum of the catalysts indicated vibration modes characteristic of the active species MoO<sub>3</sub> in the orthorhombic phase. The methanol/oil molar ratio was the variable that most influenced the yield of methyl esters within the levels of a design of experiments matrix. The highest biodiesel yield of 79.2% was obtained with 6 (wt.%) of MoO<sub>3</sub>, 4 h of reaction time, and a methanol/oil molar ratio of 20/1. This reaction condition uses a lower molybdenum content, lower catalyst load, and lower methanol/oil molar ratio than those reported in the literature, which qualitatively reduces the process costs. A quantitative economic analysis must be further performed to define the economic viability of the process.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142811164","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

Metal-Free Sustainable N-α-C(sp3)-H Functionalization of Arylmethylamines with Arylmethylketones to Synthesis of Kröhnke Pyridines Under Solvent-free Condition

IF 2.3 4区化学

Catalysis Letters Pub Date : 2024-12-02 DOI: 10.1007/s10562-024-04873-x

Vikas D. Kadu, Sankala Naga Chandrudu, Mahesh G. Hublikar, Shahaji I. Bansode, Raghunath B. Bhosale

引用次数: 0

Mechanistic Investigation of Dimethyl Carbonate Synthesis Over Palladium Chloride Catalyst

IF 2.3 4区化学

Catalysis Letters Pub Date : 2024-12-02 DOI: 10.1007/s10562-024-04855-z

Zhi-Shen Huang, Zhang-Feng Zhou, Lu-Yang Qiao, Yun-Yun Zeng, Shan-Shan Zong, Yuan-Gen Yao

{"title":"Mechanistic Investigation of Dimethyl Carbonate Synthesis Over Palladium Chloride Catalyst","authors":"Zhi-Shen Huang, Zhang-Feng Zhou, Lu-Yang Qiao, Yun-Yun Zeng, Shan-Shan Zong, Yuan-Gen Yao","doi":"10.1007/s10562-024-04855-z","DOIUrl":"10.1007/s10562-024-04855-z","url":null,"abstract":"<div><p>The production of dimethyl carbonate (DMC) from CO and methyl nitrite (MN) is of great industrial interest for chemicals upgrading. As one of the most efficient catalysts, PdCl<sub>2</sub> based catalyst has been widely investigated and been verified to be highly selective toward DMC yielding. However, the underlying mechanism is unclear so far. Herein, we identified the active sites and corresponding reaction pathway on PdCl<sub>2</sub> (140) surface by the density functional theory (DFT) calculations, combining with X-ray absorption fine structure (XAFS) and <i>in-situ</i> diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) measurements. The dissociation of MN resulted in the construction of Cl vacancies on PdCl<sub>2</sub> (140) surface, which are the specific sites for DMC formation. On the other hand, the continuous loss of Cl induced the reduction of PdCl<sub>2</sub> to Pd, leading to changed pathway of reaction and decreased yield of DMC. These insights highlighted the importance of Cl-balance in PdCl<sub>2</sub> based catalyst system, which determined the final products of CO oxidative esterification.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142761715","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

Electric Field-assisted Photocatalytic Reduction of Carbon Dioxide over Titanium Dioxide: Influence of the Type and Strength of Electric Field

IF 2.3 4区化学

Catalysis Letters Pub Date : 2024-12-02 DOI: 10.1007/s10562-024-04887-5

Oleksandr Shtyka, Radoslaw Ciesielski, Adam Kedziora, Malgorzata Szynkowska-Jozwik, Tomasz Maniecki

{"title":"Electric Field-assisted Photocatalytic Reduction of Carbon Dioxide over Titanium Dioxide: Influence of the Type and Strength of Electric Field","authors":"Oleksandr Shtyka, Radoslaw Ciesielski, Adam Kedziora, Malgorzata Szynkowska-Jozwik, Tomasz Maniecki","doi":"10.1007/s10562-024-04887-5","DOIUrl":"10.1007/s10562-024-04887-5","url":null,"abstract":"<div><p>This study focuses on investigating the sole impact of an external electric field on the photocatalytic activity of TiO<sub>2</sub>-based materials. Typically, built-in electric fields are used to efficiently separate free energy carriers and improve the photocatalytic performance of semiconductors. The creation of such field requires modifications to the photocatalyst that alter various properties such as adsorption and optical characteristics. These modifications make it challenging to isolate and interpret the promotion effect associated with the electric field alone. The investigations were carried out in the gas-phase conditions in a specially constructed reactor equipped with two electrodes connected to a high – voltage that provides a field strength of up to 5.7·10<sup>3</sup> V/cm. The results showed that the effect of electric field promotion varied significantly depending on the properties of titanium dioxide, such as structure, adsorption, and presence of impurities. The strength and the type (direct or alternating current) of the electric field also played a determining role. The greatest promoting effect was observed for rutile, the photocatalytic activity of which under an electric field increased threefold in the process of reduction of CO<sub>2</sub> with water vapor.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10562-024-04887-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142761714","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

Diesel Production by Catalytic Cracking of Castor Oil Using Aluminas and Silicas

IF 2.3 4区化学

Catalysis Letters Pub Date : 2024-12-02 DOI: 10.1007/s10562-024-04874-w

Eric B. Ribeiro, Leila O. Daher, Elaine A. Faria, Fernando C. Garcia, Mirian S. C. Pereira, Joel C. Rubim, Alexandre G. S. Prado, Paulo A. Z. Suarez, Romulo D. A. Andrade

{"title":"Diesel Production by Catalytic Cracking of Castor Oil Using Aluminas and Silicas","authors":"Eric B. Ribeiro, Leila O. Daher, Elaine A. Faria, Fernando C. Garcia, Mirian S. C. Pereira, Joel C. Rubim, Alexandre G. S. Prado, Paulo A. Z. Suarez, Romulo D. A. Andrade","doi":"10.1007/s10562-024-04874-w","DOIUrl":"10.1007/s10562-024-04874-w","url":null,"abstract":"<div><p>The purely thermal cracking of castor oil produces a mixture of compounds with unsatisfactory fuel properties, as high viscosity, high acid value and low cetane index. This low quality is associated with high value of oxygenated products in obtained product composition. The aim of this work was to improve the physical–chemical properties of cracking product (pyrolysis) of castor oil using different catalysts, such as silica and silica doped with titanium (IV) oxide, and alumina and alumina doped with zinc(II), tin(II), titanium(IV) and zirconium(IV) oxides. The study of the physical–chemical properties of the castor oil cracking products showed that all these catalysts have activity in the deoxygenating, being the better results reached using pure and doped alumina. We also studied the catalytic activity of laboratory synthesized alumina (pure and as support for Lewis acid metals), commercial silica (Merck) and titanium (IV) oxide supported on silica, in the cracking of castor oil. It was observed that the aluminas showed better activity in the deoxygenating of the products than silicas. This fact can be explained by higher acidity and mesoporous characteristic of the aluminas.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><img></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142761685","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 a Novel Highly Active NiMoO4 Nanocatalyst for the Sustainable Production of Anhydrous Formaldehyde from the Non-oxidative Dehydrogenation of Methanol at Relatively Low Temperature

IF 2.3 4区化学

Catalysis Letters Pub Date : 2024-12-02 DOI: 10.1007/s10562-024-04865-x

Aya Farouk Farghal, Abd El-Aziz Ahmed Said, Mohamed M. M. Abd El-Wahab, Mohamed Nady Goda

{"title":"Synthesis of a Novel Highly Active NiMoO4 Nanocatalyst for the Sustainable Production of Anhydrous Formaldehyde from the Non-oxidative Dehydrogenation of Methanol at Relatively Low Temperature","authors":"Aya Farouk Farghal, Abd El-Aziz Ahmed Said, Mohamed M. M. Abd El-Wahab, Mohamed Nady Goda","doi":"10.1007/s10562-024-04865-x","DOIUrl":"10.1007/s10562-024-04865-x","url":null,"abstract":"<div><p>The production of formaldehyde (FA) and clean hydrogen gas via the non-oxidative dehydrogenation of methanol is seen to be a promising approach where the anhydrous formaldehyde is an ideal for using in the subsequent manufacture of oxygenated synthetic fuels. In this investigation, NiMoO<sub>4</sub> with nanoaggregates morphology was synthesized by hydrothermal method in presence of triethylamine (TEA) as a surfactant and tested for the non-oxidative catalytic dehydrogenation of methanol into formaldehyde at relatively low temperature. Structural, morphological and textural properties were characterized by TGA, DSC, XPS, XRD, FT-IR, HR-TEM, pyridine-TPD and N<sub>2</sub>-sorption assessments. Results of XRD verified the coexistence of mixed phases of both α and β-NiMoO<sub>4</sub>. The catalysts' texture, structure, acidity and catalytic activity were greatly influenced by the introduction and the molar ratio of TEA. The variation of catalytic activity is strongly associated to the variation in S<sub>BET</sub> and acidity. Activity results revealed that catalyst with Ni:TEA ratio of 1:1 (N<sub>1</sub>T<sub>1</sub>) was the most active catalyst with methanol conversion of 96% and selectivity to FA of 95% at reaction temperature of 325 °C. The outstanding catalytic performance of this catalyst is due to the presence of weak and intermediate strength Brønsted acidic sites on its surface. This catalyst showed remarkable stability for the synthesis of anhydrous formaldehyde over a 160 h period while maintaining the same conversion and selectivity.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142761684","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

Visible Light Induced Eosin Y Catalysed Green Synthesis of Substituted Pyrroles 可见光诱导曙红 Y 催化取代吡咯的绿色合成

IF 2.3 4区化学

Catalysis Letters Pub Date : 2024-11-29 DOI: 10.1007/s10562-024-04888-4

Rohit Kumar, Km Garima, Vishal Srivastava, Praveen P. Singh, Pravin K. Singh

引用次数: 0

Correction to: In Silico Models for Prediction of Methanol Yield in CO2 Hydrogenation Reaction Using CuBased Catalysts 更正：使用铜基催化剂预测 CO2 加氢反应中甲醇产率的硅学模型

IF 2.3 4区化学

Catalysis Letters Pub Date : 2024-11-29 DOI: 10.1007/s10562-024-04882-w

Vanjari Pallavi, Reddi Kamesh, K. Yamuna Rani

引用次数: 0

Promotional Catalytic Activity of Bifunctional Ru-Ce-Zr Catalysts forNH3-SCO by Deposition Order of Dual Active Components

IF 2.3 4区化学

Catalysis Letters Pub Date : 2024-11-29 DOI: 10.1007/s10562-024-04891-9

Zhengxiong Jiang

{"title":"Promotional Catalytic Activity of Bifunctional Ru-Ce-Zr Catalysts forNH3-SCO by Deposition Order of Dual Active Components","authors":"Zhengxiong Jiang","doi":"10.1007/s10562-024-04891-9","DOIUrl":"10.1007/s10562-024-04891-9","url":null,"abstract":"<div><p>The ammonia fuel injected into the combustion chamber cannot be completely combusted resulting in high levels of escaped ammonia in the ammonia-fueled engine exhaust. It is a feasible way to obtain ammonia selective catalytic oxidation (NH<sub>3</sub>-SCO) catalysts with excellent performance using noble metal-transition metal catalysts. In this work, a series of Ru-Ce-Zr bifunctional catalysts were synthesized by precipitation and impregnation methods to investigate the influence of introduction methods of different active components (Ru and Ce) on their physicochemical properties and NH<sub>3</sub>-SCO performance. Among them, the BET and NH<sub>3</sub>-TPD results showed that Ru-Ce/ZrO<sub>2</sub> (RC/Z) catalyst had the largest specific surface area and NH<sub>3</sub> desorption amount, indicating that its surface could capture more NH<sub>3</sub>. More importantly, compared to other catalysts, RC/Z catalyst exhibited highest relative concentration of Ce<sup>3+</sup>, which facilitated electron transfer via Ce<sup>4+</sup> + Ru<sup>3+</sup> ↔ Ce<sup>3+</sup> + Ru<sup>4+</sup>. The Ru-Ce/ZrO<sub>2</sub> catalyst exhibited the best catalytic performance under the strong interaction between Ru and Ce species. its NH<sub>3</sub> conversion reached 100% and N<sub>2</sub> selectivity was 95.7% at 237 °C. The N<sub>2</sub> selectivity exceeded 70% over a wide temperature range of 150–400 °C. In situ diffuse reflectance infrared Fourier transform spectroscopy (in-situ DRIFTS) showed that the surface of RC/Z catalyst exhibited the highest amount of Lewis and Brønsted acid sites, which might be one of the reasons for its excellent N<sub>2</sub> selectivity. This work revealed the effect of the way of introduction of Ru and Ce active species on their NH<sub>3</sub>-SCO performance.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142754000","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

Palladium-Based Catalyst on L-Histidine-Modified Boron Nitride Nanosheets: A Novel, Stable, and Highly Efficient Heterogeneous Catalyst for Suzuki–Miyaura Reaction L 组氨酸修饰的氮化硼纳米片上的钯基催化剂：用于铃木-宫浦反应的新型、稳定、高效异构催化剂

IF 2.3 4区化学

Catalysis Letters Pub Date : 2024-11-28 DOI: 10.1007/s10562-024-04837-1

Xu Wang, Guohua Li, Guo Feng, Yajie Wang, Hongxin Sun

{"title":"Palladium-Based Catalyst on L-Histidine-Modified Boron Nitride Nanosheets: A Novel, Stable, and Highly Efficient Heterogeneous Catalyst for Suzuki–Miyaura Reaction","authors":"Xu Wang, Guohua Li, Guo Feng, Yajie Wang, Hongxin Sun","doi":"10.1007/s10562-024-04837-1","DOIUrl":"10.1007/s10562-024-04837-1","url":null,"abstract":"<div><p>In this study, we developed a multiphase catalyst, BNNSs/His-Pd, by anchoring palladium nanoparticles onto L-histidine-modified boron nitride nanosheets. BNNSs/His-Pd was shown to be a good 2D heterogeneous catalyst. The enhanced affinity of the modified BNNSs for metal complexes, coupled with their inherent stability, contributes to the catalytic activity of the BNNSs/His-Pd-catalyzed Suzuki coupling reaction. The catalyst showed a broad substrate scope, good catalytic activity, and the convenience of not requiring inert gas protection in the Suzuki–Miyaura cross-coupling reaction. Even after 10 recycling cycles, the product yield remained at 95%, highlighting its significant potential for practical applications.</p><h3>Graphical Abstract</h3><p>Stable and efficient BNNSs/His-Pd heterogeneous catalysts were successfully constructed by modifying boron nitride nanosheets with L-histidine. The effect of L-histidine enhanced the dispersion and stability of Pd NPs on BNNSs carriers, combined with the inherent stability of BNNSs which resulted in the improvement of catalytic activity and recycling performance of the catalysts in the Suzuki coupling reaction.</p>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142737224","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