Catalysis Letters最新文献_第3页

Sunlight Driven Degradation of Drug Residues Using CuO Incorporated- Zeolite Supported- Graphitic Carbon Nitride 使用掺入氧化铜的沸石支撑氮化石墨碳在阳光下降解药物残留物

IF 2.3 4区化学

Catalysis Letters Pub Date : 2024-11-16 DOI: 10.1007/s10562-024-04866-w

Anju John, Mekha Susan Rajan, Jesty Thomas

{"title":"Sunlight Driven Degradation of Drug Residues Using CuO Incorporated- Zeolite Supported- Graphitic Carbon Nitride","authors":"Anju John, Mekha Susan Rajan, Jesty Thomas","doi":"10.1007/s10562-024-04866-w","DOIUrl":"10.1007/s10562-024-04866-w","url":null,"abstract":"<div><p>Copper oxide nanoparticles incorporated-zeolite supported-graphitic carbon nitride (CuO/g–C<sub>3</sub>N<sub>4</sub>/Zeolite Y) catalyst was fabricated through a facile hydrothermal method, in which CuO nanoparticles were produced via precipitation. The synthesized CuO/g–C<sub>3</sub>N<sub>4</sub>/Zeolite Y was examined using characterization techniques such as FT-IR, XRD, XPS, TEM, SEM, EDX, TG, BET, DRS, and PL. BET analysis revealed that integrating zeolite and CuO has increased the surface area of graphitic carbon nitride. Increased separation efficiency and reduced recombination rates of photogenerated electrons and holes in CuO/g–C<sub>3</sub>N<sub>4</sub>/Zeolite Y were confirmed by photoluminescence studies. The CuO/g–C<sub>3</sub>N<sub>4</sub>/Zeolite Y catalyst exhibits enhanced efficiency for degrading MB and CV dyes compared to pristine g-C<sub>3</sub>N<sub>4</sub> under sunlight exposure. The active species studies demonstrated that hydroxyl radicals, superoxide anion radicals and holes involve in the photocatalytic destruction of pollutants. Additionally, the CuO/g–C<sub>3</sub>N<sub>4</sub>/Zeolite Y composite efficiently degraded the antibiotic ceftazidime. Intermediates generated during the degradation process were identified, and plausible degradation pathways for ceftazidime were proposed through LC–MS analysis. This study implies that the synthesized catalyst can be used in the wastewater cleanup process to eliminate persistent organic contaminants and pharmaceutical pollutants under sunlight irradiation.</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":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142645666","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

Efficient Removal of Acid Orange 7 by Activating Persulfate Using Paper Sludge Biochar: Singlet Oxygen-Dominated Mechanism 利用造纸污泥生物炭活化过硫酸盐高效去除酸性橙 7：单线态氧主导机制

IF 2.3 4区化学

Catalysis Letters Pub Date : 2024-11-16 DOI: 10.1007/s10562-024-04863-z

Hongtao Zhang, Shuhan Cai, Zehong Hu, Wang Qin, Fengtao Chen, Xin Zhang

{"title":"Efficient Removal of Acid Orange 7 by Activating Persulfate Using Paper Sludge Biochar: Singlet Oxygen-Dominated Mechanism","authors":"Hongtao Zhang, Shuhan Cai, Zehong Hu, Wang Qin, Fengtao Chen, Xin Zhang","doi":"10.1007/s10562-024-04863-z","DOIUrl":"10.1007/s10562-024-04863-z","url":null,"abstract":"<div><p>Excess sludge in the paper industry is a hazardous solid waste that requires urgent and proper disposal for environmental protection and resource utilization. In this study, a novel magnetic biochar (Fe-SDBC) synthesized from paper sludge through one-step pyrolysis was employed to activate persulfate (PDS) for the efficient removal of acid orange 7 (AO7). The results indicated that Fe-SDBC could effectively activate PDS to remove 97.8% of AO7 within 90 min, with 89.4% removed within 5 min. Fe-SDBC had unique properties with abundant adsorption and active sites, including iron-containing compounds and oxygen-containing functional groups. The addition concentrations of Fe-SDBC (0.5 g/L) and PDS (10 mM) were optimized based on response surface methodology. Furthermore, Fe-SDBC presented good stability over a wide range of pH (3 ~ 11) and reusability in cyclic experiments. Coexisting ions, such as CO<sub>3</sub><sup>2−</sup>, HCO<sub>3</sub><sup>−</sup>, and PO<sub>4</sub><sup>3−</sup>, had an inhibitory effect on AO7 removal. Both radical and non-radical pathways were proved to be involved in the Fe-SDBC/PDS system for AO7 removal, with singlet oxygen (<sup>1</sup>O<sub>2</sub>) being the dominant species. Additionally, the degradation pathways were investigated and toxicity assessment was evaluated. This work will provide a potential approach for paper sludge recycling in the wastewater treatment.</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":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142645665","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

Novel Pd-Fe2O3-Ni Electrocatalyst with Low Pd Content for Electrochemical Reduction of 4-Chlorophenol 用于 4-氯苯酚电化学还原的新型低钯含量 Pd-Fe2O3-Ni 电催化剂

IF 2.3 4区化学

Catalysis Letters Pub Date : 2024-11-16 DOI: 10.1007/s10562-024-04850-4

Hao-Bo Gao, Tian-Zhen Zhu, Chen-Xin Xie, Jun Yang, Rui-Jia Zhang, Shao-Xun Han, Chun-Yan Ren, Li-Shan Zhou, Hou-Kai Teng, En-Shan Han, Guang-Lei Qian

{"title":"Novel Pd-Fe2O3-Ni Electrocatalyst with Low Pd Content for Electrochemical Reduction of 4-Chlorophenol","authors":"Hao-Bo Gao, Tian-Zhen Zhu, Chen-Xin Xie, Jun Yang, Rui-Jia Zhang, Shao-Xun Han, Chun-Yan Ren, Li-Shan Zhou, Hou-Kai Teng, En-Shan Han, Guang-Lei Qian","doi":"10.1007/s10562-024-04850-4","DOIUrl":"10.1007/s10562-024-04850-4","url":null,"abstract":"<div><p>Chlorophenol wastewater has a serious impact on the environment, and it is not easily degraded by traditional methods. The novel electrochemical hydrogen evolution reduction degradation has received widespread attention, among which the electrocatalytic performance of the electrode is particularly critical. In this study, Pd-Fe<sub>2</sub>O<sub>3</sub>-coated nickel foam electrode (Pd-Fe<sub>2</sub>O<sub>3</sub>-Ni) was prepared by annealing on Fe–Ni and introducing Pd into Fe<sub>2</sub>O<sub>3</sub>. Its degradation performance is better than that of the original nickel foam (Ni) and Fe<sub>2</sub>O<sub>3</sub>-Ni electrodes. The removal of 4-chlorophenol by Pd-Fe<sub>2</sub>O<sub>3</sub>-Ni was 98.2%, which was 1.4–1.52, 10–12 and 10.3–11.4 times higher than that of the unannealed Pd-Fe<sub>2</sub>O<sub>3</sub>-Ni, Ni, and Fe<sub>2</sub>O<sub>3</sub>-Ni, respectively. Meanwhile, the Pd-Fe<sub>2</sub>O<sub>3</sub>-Ni electrode had good stability, and the 4-chlorophenol removal rate was maintained at 92% after five repetitions, which proved the applicability of the Pd-Fe<sub>2</sub>O<sub>3</sub>-Ni electrode. Therefore, the prepared Pd-Fe<sub>2</sub>O<sub>3</sub>-Ni is a high-performance electrode for electrochemical reduction and degradation of wastewater.</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":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142645664","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

Response Surface Optimization of Solvent-Tolerant Cold-Active Lipase Production by Pseudomonas sp. VITCLP4 VITCLP4 假单胞菌生产耐溶剂冷活性脂肪酶的响应面优化

IF 2.3 4区化学

Catalysis Letters Pub Date : 2024-11-14 DOI: 10.1007/s10562-024-04848-y

V. Iswareya Lakshimi, M. Kavitha

{"title":"Response Surface Optimization of Solvent-Tolerant Cold-Active Lipase Production by Pseudomonas sp. VITCLP4","authors":"V. Iswareya Lakshimi, M. Kavitha","doi":"10.1007/s10562-024-04848-y","DOIUrl":"10.1007/s10562-024-04848-y","url":null,"abstract":"<div><p>The yield of solvent-tolerant cold-active lipase from halo-tolerant <i>Pseudomonas</i> sp. VITCLP4 was improved by applying statistical methods to precisely combine medium components and other conditions. A two-level Plackett–Burman (PB) design was utilized to screen the most significant variables from eleven variables that influence lipase production. Analysis of variance revealed that Tween-80, peptone, and KH<sub>2</sub>PO<sub>4</sub> were statistically significant. Optimum levels of selected variables were ascertained by one-factor-at-a-time (OFAT) analysis. The selected three components' optimum values and interactive effects were established by response surface methodology (RSM) using a five-level-three-factor approach based on the central composite design (CCD). The optimized medium containing Tween-80, 0.6% (v/v), peptone, 0.85% (w/v), KH<sub>2</sub>PO<sub>4</sub>, 0.1% (w/v), yeast extract, 0.1% (w/v), olive oil, 0.2% (v/v) and inoculum size, 0.2% (v/v) resulted in maximum lipase production of 1356 Units mL<sup>−1</sup> min<sup>−1</sup> with 7.9-fold increase in the yield. This study provides insights into enhancing lipase production statistically with optimized resources that can be utilized in bioprocess studies and industrial applications.</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":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142636637","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

CuCo/Ti-SBA-15 Catalyst for Glycerol Selective Oxidation 用于甘油选择性氧化的 CuCo/Ti-SBA-15 催化剂

IF 2.3 4区化学

Catalysis Letters Pub Date : 2024-11-14 DOI: 10.1007/s10562-024-04839-z

Jihang Li, Guomin Xiao, Lijing Gao, Lingling Xu, Xiu Wen, Yuanzhuang Li

{"title":"CuCo/Ti-SBA-15 Catalyst for Glycerol Selective Oxidation","authors":"Jihang Li, Guomin Xiao, Lijing Gao, Lingling Xu, Xiu Wen, Yuanzhuang Li","doi":"10.1007/s10562-024-04839-z","DOIUrl":"10.1007/s10562-024-04839-z","url":null,"abstract":"<div><p>Selective oxidation of glycerol has been considered to be one of the ways of efficient conversion and utilization of glycerol. This paper reported the preparation of a series of supported non-noble metal catalysts on Ti modified SBA-15 supported by CuCo, a cheap and readily available non-noble metal, and evaluated the catalytic effect of the catalysts in the selective oxidation of glycerol to produce tartronic acid. The properties of Cu<sub>x</sub>Co<sub>y</sub>/Ti-SBA-15 catalysts were characterized by XRD, XPS, FT-IR, BET, SEM and TEM. The results showed that Cu and Co were uniformly distributed on the surface of Ti-SBA-15 and the original structure of SBA-15 was maintained. The catalytic activity of CuO and Co<sub>3</sub>O<sub>4</sub> can be improved through the synergistic effect of valence change. In addition, the glycerol conversion was 53.8% and tartronic acid selectivity was 54.5% under the optimal reaction conditions. After five cycles, the catalyst still maintained good reuse performance.</p><h3>Graphic 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":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142636942","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

Functionalising Pinus roxburghii Biochar with Mg–Fe-LDH for Effective Organic Pollutant Mitigation in Wastewater 用 Mg-Fe-LDH 对罗布麻生物炭进行功能化处理，以有效缓解废水中的有机污染物

IF 2.3 4区化学

Catalysis Letters Pub Date : 2024-11-14 DOI: 10.1007/s10562-024-04875-9

Nancy Jaswal, Nipjyoti Sarma, Purnima Justa, Amit Kumar Sharma, Pragati Kumar, Pramod Kumar

{"title":"Functionalising Pinus roxburghii Biochar with Mg–Fe-LDH for Effective Organic Pollutant Mitigation in Wastewater","authors":"Nancy Jaswal, Nipjyoti Sarma, Purnima Justa, Amit Kumar Sharma, Pragati Kumar, Pramod Kumar","doi":"10.1007/s10562-024-04875-9","DOIUrl":"10.1007/s10562-024-04875-9","url":null,"abstract":"<div><p>Biochar, a carbon-enriched material, has been introduced as robust sorbent for the removal of wide array of pollutants. Recently, Biochar functionalized with metals or metal hydroxide composites has gained attention as low-cost, sustainable materials. Layered double hydroxides (LDHs) and biochar interact synergistically to produce composites with significantly improved specific surface area, structural heterogenicity, surface functional groups, stability and adsorptive properties. In this study, composites constructed out on Mg–Fe LDHs supported by biochar (BC) derived from <i>Pinus roxburghii</i> (chir pine) waste are synthesised. <i>Pinus roxburghii</i> biochar (PR-BC-500) was produced at 500 ℃ under inert conditions and used to synthesize biochar incorporated LDH nanostructures (PR-LDH-500) hydrothermally. Nanocomposites were characterized by XRD, FTIR, BET, Raman, Zeta potential, UV, PL, SEM and EDS techniques. The SEM results display the ideal distribution of LDH particles on the surface of biochar, increasing surface area and occupying pores, confirming composite formation. Photocatalytic outcomes demonstrated that the BC particles integrated into the LDH structure demonstrated strong photocatalytic performance as prepared. 93.4% of Methylene Blue was degraded through photocatalytic degradation in the active participation of PR-LDH-500 nanocomposites, whereas PR-BC-500 degraded only 76.8%. The optimal conditions for methylene blue degradation using PR-LDH-500 and PR-BC-500 photocatalysts were achieved at a catalyst dosage of 50 mg, with a maximum degradation of 94% at pH 12 after 240 min of UV irradiation. According to the results, PR-LDH-500 has outstanding feasibility as a durable and inexpensive adsorbent for the purifying dye-tainted aqueous ecosystems.</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":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142636638","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

Ethylation of Benzene with Ethane over MFI Zeolite-Supported Pb Catalyst 在 MFI 沸石支撑的铅催化剂上进行苯与乙烷的乙化反应

IF 2.3 4区化学

Catalysis Letters Pub Date : 2024-11-13 DOI: 10.1007/s10562-024-04862-0

Koshiro Nakamura, Sho Tanizaki, Kakeru Tsubokawa, Etsushi Tsuji, Satoshi Suganuma, Naonobu Katada

{"title":"Ethylation of Benzene with Ethane over MFI Zeolite-Supported Pb Catalyst","authors":"Koshiro Nakamura, Sho Tanizaki, Kakeru Tsubokawa, Etsushi Tsuji, Satoshi Suganuma, Naonobu Katada","doi":"10.1007/s10562-024-04862-0","DOIUrl":"10.1007/s10562-024-04862-0","url":null,"abstract":"<div><p>Conversion of a short alkane such as ethane into chemical feedstocks instead of alkene becomes important for efficient use of natural gas and refinery off-gas. Here direct ethylation of benzene with ethane into ethylbenzene was attempted. Preceding studies clarified catalytic activity of Pt-loaded MFI-type zeolite. In addition, for a similar reaction, i.e., methylation of benzene with methane, we previously found catalytic activity of Co/MFI. Based on these backgrounds, various metal elements supported by zeolites were investigated as catalysts for a reaction between ethane and benzene. Pt, Pb, Zn, Mo, Co, and Ga/MFI showed high activity for ethylation of benzene with ethane. Among them, Pb/MFI showed high reaction rate for formation of desired products (ethylbenzene, styrene and diethylbenzene), while the others brought side reactions, i.e., formation of C<sub>3−5</sub> aliphatic hydrocarbons, toluene, naphthalene, and its derivatives. Pb/MFI showed stable activity, while Pt, Zn, and Mo/MFI showed deactivation due to carbonaceous formed by the side reactions.</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":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142636788","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

Study on the Hydrogen Evolution Reaction Performance of Graphene Synthesized by Detonation Approach 利用爆破法合成石墨烯的氢气进化反应性能研究

IF 2.3 4区化学

Catalysis Letters Pub Date : 2024-11-13 DOI: 10.1007/s10562-024-04840-6

Xitao Qiao, Shuaidong Wang, Jiale Zhang, Yanyan Wang, Guangke Tian

引用次数: 0

Bases Tuning Selective Aerobic Oxidation of Benzyl Alcohol to Benzaldehyde Catalyzed by Cu2+/TEMPO 调谐 Cu2+/TEMPO 催化苯甲醇到苯甲醛的选择性有氧氧化的碱

IF 2.3 4区化学

Catalysis Letters Pub Date : 2024-11-13 DOI: 10.1007/s10562-024-04843-3

Wenjie Yang, Fan Xu, Guojun Shi

{"title":"Bases Tuning Selective Aerobic Oxidation of Benzyl Alcohol to Benzaldehyde Catalyzed by Cu2+/TEMPO","authors":"Wenjie Yang, Fan Xu, Guojun Shi","doi":"10.1007/s10562-024-04843-3","DOIUrl":"10.1007/s10562-024-04843-3","url":null,"abstract":"<div><p>Promotional role of basic ligands on the combination of cupric ions and 2,2,6,6-tetramethyl-piperidine-N-noxyl (Cu<sup>2+</sup>/TEMPO) was tried in the previous publications for selective aerobic oxidation of benzyl alcohol but a lack of a detailed investigation encourages us to perform further work. Here, Cu<sup>2+</sup>/TEMPO was used to catalyze selective aerobic oxidation of benzyl alcohol to benzaldehyde in the presence of bases, and triethylamine was found to be the best additive. A conversion of benzyl alcohol of 92.9% and a selectivity to benzaldehyde of 100% was observed in the presence of Cu<sup>2+</sup>/TEMPO/triethylamine. The promotion of triethylamine on Cu<sup>2+</sup>/TEMPO can be related to its capability in electron-donor and deprotonation. The speciation of the ternary catalyst combination was partially observed by the means of high-resolution mass spectroscopy (HRMS) and some key intermediates such as N-hydroxyl-2,2,6,6-tetramethylperidine (TEMPOH) and ethyl-substituted ammonium ions were confirmed. This study might provide some insights into the highly efficient transformation from benzyl alcohol to benzaldehyde and the promotion of bases on this transformation.</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":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142636789","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

Influence of Channel, Construction and Brønsted Acid Sites on the Catalytic Conversion Pathways of Isobutane Over MFI, TON and RFE Zeolites MFI、TON 和 RFE 沸石上异丁烷催化转化途径的通道、结构和布氏酸位点的影响

IF 2.3 4区化学

Catalysis Letters Pub Date : 2024-11-13 DOI: 10.1007/s10562-024-04847-z

Yibin Hou, Rongxin Zhang, Zijian Wang, Bin Lu, Jieguang Wang

{"title":"Influence of Channel, Construction and Brønsted Acid Sites on the Catalytic Conversion Pathways of Isobutane Over MFI, TON and RFE Zeolites","authors":"Yibin Hou, Rongxin Zhang, Zijian Wang, Bin Lu, Jieguang Wang","doi":"10.1007/s10562-024-04847-z","DOIUrl":"10.1007/s10562-024-04847-z","url":null,"abstract":"<div><p>Despite thorough exploration of the acidity properties and pore structure effects of zeolite catalysts on catalytic conversion, a comprehensive understanding of how these factors influence reaction pathways is still lacking. Herein, three common zeolites (ZSM-5, ZSM-22 and ZSM-48) of different shapes and size dimensions were introduced into catalytic conversion of isobutane, with combination of X-ray diffraction (XRD), transmission electron microscopy (TEM), N<sub>2</sub> adsorption and desorption, solid-state <sup>29</sup>Si and <sup>27</sup>Al MAS NMR, ammonia temperature programmed desorption (NH<sub>3</sub>-TPD) and pyridine adsorption infrared spectroscopy (Py-FTIR) to characterize their structure and acidity. And channels and topologies were associated with stability and catalytic activity. ZSM-5 performed best, showing the most active sites. Furthermore, ZSM-48 led to an increase in the propene yield by suppressing inhibitory secondary reactions in the monomolecular reaction pathway. Moreover, the amount of Brønsted acid sites (BASs) of ZSM-22 were a key factor in promoting light alkene formation. However, 1D channels contributed to the deactivation of ZSM-22 and ZSM-48. The detailed reaction pathways of zeolite catalysts with diverse pore structures and acidities are crucial for optimizing their catalytic 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":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142636819","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