Pub 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}
The adsorption of copper valerate, compared with copper nitrate, on HZSM-5 and γ-Al2O3 was studied using IR and inductively coupled plasma (ICP). The surface area and pore structure of HZSM-5 and γ-Al2O3 was measured with nitrogen physical adsorption. Results indicated a chemical adsorption of copper valerate occurred on the surface of γ-Al2O3 and external surface of HZSM-5. The =(COO)2Cu was the adsorbing group. There even existed a chemical reaction, which resulted in the formation of valeric acid.
{"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}
Pub Date : 1997-11-01DOI: 10.1016/S0144-2449(97)00121-8
S.L. Jahn, P.A.P. Nascente, D. Cardoso
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.
{"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}
Ca ion-exchanged zeolites have been characterized by electron spin resonance (e.s.r.), 27Al magic-angle spinning nuclear magnetic resonance (MAS n.m.r.), 29Si MAS n.m.r., and diffuse reflectance Fourier transform infrared spectroscopy (i.r.). The presence of the radical species that are assigned to solid-state defects was confirmed in CaA zeolites, and the amount of the radical was dependent on the thermal treatment temperature in air. The present experimental results suggest that the formation of extralattice aluminum in the CaA sodalite cage and the change of calcium species by thermal treatment relate to the formation and disappearance of radical species.
采用电子自旋共振(e.s.r)、27Al魔角自旋核磁共振(MAS n.m.r)、29Si MAS n.m.r和漫反射傅里叶变换红外光谱(i.r)对钙离子交换沸石进行了表征。在CaA沸石中，被分配到固态缺陷的自由基物种的存在得到了证实，并且自由基的数量取决于空气中的热处理温度。实验结果表明，CaA钠岩笼中晶格外铝的形成和热处理过程中钙种类的变化与自由基种类的形成和消失有关。
{"title":"Solid-state defects in calcined CaA zeolite","authors":"Hideyuki Oka, Kunikazu Kamioka, Yuji Tokunaga, Tadashi Okada","doi":"10.1016/S0144-2449(97)00120-6","DOIUrl":"10.1016/S0144-2449(97)00120-6","url":null,"abstract":"<div><p>Ca ion-exchanged zeolites have been characterized by electron spin resonance (e.s.r.), <sup>27</sup>Al magic-angle spinning nuclear magnetic resonance (<em>MAS</em> n.m.r.), <sup>29</sup>Si <em>MAS</em> n.m.r., and diffuse reflectance Fourier transform infrared spectroscopy (i.r.). The presence of the radical species that are assigned to solid-state defects was confirmed in CaA zeolites, and the amount of the radical was dependent on the thermal treatment temperature in air. The present experimental results suggest that the formation of extralattice aluminum in the CaA sodalite cage and the change of calcium species by thermal treatment relate to the formation and disappearance of radical species.</p></div>","PeriodicalId":23983,"journal":{"name":"Zeolites","volume":"19 5","pages":"Pages 455-457"},"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)00120-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86126340","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}
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