{"title":"作为棕榈油酯交换反应钾催化剂载体的沸石 NaX 结晶度的影响","authors":"","doi":"10.1016/j.jpcs.2024.112389","DOIUrl":null,"url":null,"abstract":"<div><div>Zeolite NaX samples synthesized from varying hydrothermal times (HTx, x = 0, 4, 8, 12, and 24 h) were impregnated with potassium (K) to produce K/HTx as catalysts in the transesterification of palm oil with methanol. The goal of this work is to explore the influence of the crystallinity of zeolite NaX on biodiesel production. The findings from XRD, N<sub>2</sub> sorption, SEM-EDS, FTIR, and CO<sub>2</sub>-TPD demonstrate that the longer hydrothermal treatment times enhance the zeolite NaX crystallinity. A pure phase of zeolite NaX was achieved from hydrothermal times of 8 h or longer. The HT0 and HT4 exhibited poor crystallinity, and consequently, the supported catalysts, K/HT0 and K/HT4, provided low biodiesel yields (29.7 % and 43.9 %, respectively) despite having similar surface area, functional groups, and morphology. The catalysts supported on fully crystallized zeolite NaX gave biodiesel yields of about 80 %. The enhanced crystallinity of zeolite increased the basicity of the K/NaX, resulting in an improved catalytic performance for the transesterification of palm oil.</div></div>","PeriodicalId":16811,"journal":{"name":"Journal of Physics and Chemistry of Solids","volume":null,"pages":null},"PeriodicalIF":4.3000,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Influence of crystallinity of zeolite NaX as a support for potassium catalyst in transesterification of palm oil\",\"authors\":\"\",\"doi\":\"10.1016/j.jpcs.2024.112389\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Zeolite NaX samples synthesized from varying hydrothermal times (HTx, x = 0, 4, 8, 12, and 24 h) were impregnated with potassium (K) to produce K/HTx as catalysts in the transesterification of palm oil with methanol. The goal of this work is to explore the influence of the crystallinity of zeolite NaX on biodiesel production. The findings from XRD, N<sub>2</sub> sorption, SEM-EDS, FTIR, and CO<sub>2</sub>-TPD demonstrate that the longer hydrothermal treatment times enhance the zeolite NaX crystallinity. A pure phase of zeolite NaX was achieved from hydrothermal times of 8 h or longer. The HT0 and HT4 exhibited poor crystallinity, and consequently, the supported catalysts, K/HT0 and K/HT4, provided low biodiesel yields (29.7 % and 43.9 %, respectively) despite having similar surface area, functional groups, and morphology. The catalysts supported on fully crystallized zeolite NaX gave biodiesel yields of about 80 %. The enhanced crystallinity of zeolite increased the basicity of the K/NaX, resulting in an improved catalytic performance for the transesterification of palm oil.</div></div>\",\"PeriodicalId\":16811,\"journal\":{\"name\":\"Journal of Physics and Chemistry of Solids\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":4.3000,\"publicationDate\":\"2024-10-18\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Physics and Chemistry of Solids\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0022369724005249\",\"RegionNum\":3,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Physics and Chemistry of Solids","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0022369724005249","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
Influence of crystallinity of zeolite NaX as a support for potassium catalyst in transesterification of palm oil
Zeolite NaX samples synthesized from varying hydrothermal times (HTx, x = 0, 4, 8, 12, and 24 h) were impregnated with potassium (K) to produce K/HTx as catalysts in the transesterification of palm oil with methanol. The goal of this work is to explore the influence of the crystallinity of zeolite NaX on biodiesel production. The findings from XRD, N2 sorption, SEM-EDS, FTIR, and CO2-TPD demonstrate that the longer hydrothermal treatment times enhance the zeolite NaX crystallinity. A pure phase of zeolite NaX was achieved from hydrothermal times of 8 h or longer. The HT0 and HT4 exhibited poor crystallinity, and consequently, the supported catalysts, K/HT0 and K/HT4, provided low biodiesel yields (29.7 % and 43.9 %, respectively) despite having similar surface area, functional groups, and morphology. The catalysts supported on fully crystallized zeolite NaX gave biodiesel yields of about 80 %. The enhanced crystallinity of zeolite increased the basicity of the K/NaX, resulting in an improved catalytic performance for the transesterification of palm oil.
期刊介绍:
The Journal of Physics and Chemistry of Solids is a well-established international medium for publication of archival research in condensed matter and materials sciences. Areas of interest broadly include experimental and theoretical research on electronic, magnetic, spectroscopic and structural properties as well as the statistical mechanics and thermodynamics of materials. The focus is on gaining physical and chemical insight into the properties and potential applications of condensed matter systems.
Within the broad scope of the journal, beyond regular contributions, the editors have identified submissions in the following areas of physics and chemistry of solids to be of special current interest to the journal:
Low-dimensional systems
Exotic states of quantum electron matter including topological phases
Energy conversion and storage
Interfaces, nanoparticles and catalysts.