ZeolitesPub Date : 2009-06-10DOI: 10.20731/ZEORAITO.26.2.65
S. Inagaki, 稲垣怜史, Y. Oumi, 近江靖則
{"title":"Verified Synthesis of Zeolitic Materials(Synthesis Commission of IZA)の紹介","authors":"S. Inagaki, 稲垣怜史, Y. Oumi, 近江靖則","doi":"10.20731/ZEORAITO.26.2.65","DOIUrl":"https://doi.org/10.20731/ZEORAITO.26.2.65","url":null,"abstract":"","PeriodicalId":23983,"journal":{"name":"Zeolites","volume":"115 1","pages":"65-71"},"PeriodicalIF":0.0,"publicationDate":"2009-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78990533","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Adsorption of copper valerate on zeolite H-ZSM-5 and γ-Al2O3","authors":"Zeshan Hu, Junxiu Dong, Wei Li, Songying Chen, Shaoyi Peng","doi":"10.1016/S0144-2449(97)00104-8","DOIUrl":"10.1016/S0144-2449(97)00104-8","url":null,"abstract":"<div><p>The adsorption of copper valerate, compared with copper nitrate, on HZSM-5 and γ-Al<sub>2</sub>O<sub>3</sub> was studied using IR and inductively coupled plasma (ICP). The surface area and pore structure of HZSM-5 and γ-Al<sub>2</sub>O<sub>3</sub> was measured with nitrogen physical adsorption. Results indicated a chemical adsorption of copper valerate occurred on the surface of γ-Al<sub>2</sub>O<sub>3</sub> and external surface of HZSM-5. The =(COO)<sub>2</sub>Cu was the adsorbing group. There even existed a chemical reaction, which resulted in the formation of valeric acid.</p></div>","PeriodicalId":23983,"journal":{"name":"Zeolites","volume":"19 5","pages":"Pages 425-428"},"PeriodicalIF":0.0,"publicationDate":"1997-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0144-2449(97)00104-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78274178","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ZeolitesPub Date : 1997-11-01Epub Date: 1998-04-14DOI: 10.1016/S0144-2449(97)00121-8
S.L. Jahn, P.A.P. Nascente, D. Cardoso
{"title":"Properties of [Ti,Al]-beta with different titanium content","authors":"S.L. Jahn, P.A.P. Nascente, D. Cardoso","doi":"10.1016/S0144-2449(97)00121-8","DOIUrl":"10.1016/S0144-2449(97)00121-8","url":null,"abstract":"<div><p>Crystallization curves of [Ti,Al]-Beta were obtained from reaction mixtures having Si/Ti ratios between 20 and 125 and Si/Al approx. 200. It was observed that practically all aluminum is incorporated into the solid during the first hours of reaction, whereas titanium and silicon are continuously incorporated. Increasing Ti content in the reaction mixture results in an increase in particle size, indicating that the presence of Ti reduces the nucleation rate. X-ray diffraction and diffuse reflectance spectra show that when the Ti content is less than 4% of the tetrahedral atoms, this element is incorporated in the sieve framework in isolated form.</p></div>","PeriodicalId":23983,"journal":{"name":"Zeolites","volume":"19 5","pages":"Pages 416-421"},"PeriodicalIF":0.0,"publicationDate":"1997-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0144-2449(97)00121-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79262541","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ZeolitesPub Date : 1997-11-01Epub Date: 1998-04-14DOI: 10.1016/S0144-2449(97)00114-0
Alberto Alberti
{"title":"Location of Brønsted sites in mordenite","authors":"Alberto Alberti","doi":"10.1016/S0144-2449(97)00114-0","DOIUrl":"10.1016/S0144-2449(97)00114-0","url":null,"abstract":"<div><p>Crystal structure refinements of mordenites indicate that partial (Si,Al) order in the tetrahedral sites regularly recurs within the observed range (6–9) Al/unit cell. Consequently, for a given Si/Al ratio, it is possible to determine the maximum number of OH groups that can be allocated on each framework oxygen. Assuming that only one proton can be bonded at the same time to the oxygens of a tetrahedron, structural data indicate that it is highly probable that Brønsted sites are on framework oxygens 02 and 07, heading toward the center of the 12-ring, and on 09, heading toward the center of the 8-ring, each with about the same population. The intensities of the i.r. stretching bands (around 3,600 cm<sup>−1</sup> wavenumbers) of the hydroxyls Si(OH)Al agree well with this result.</p></div>","PeriodicalId":23983,"journal":{"name":"Zeolites","volume":"19 5","pages":"Pages 411-415"},"PeriodicalIF":0.0,"publicationDate":"1997-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0144-2449(97)00114-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78879521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}