Applied Catalysis最新文献

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In situ raman investigation of hydrodesulphurization catalysts 加氢脱硫催化剂的原位拉曼研究
Applied Catalysis Pub Date : 1991-10-15 DOI: 10.1016/0166-9834(91)80069-9
Achim Müller *, Thomas Weber
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引用次数: 19
Calendar of forthcoming events 即将举行的活动日历
Applied Catalysis Pub Date : 1991-10-15 DOI: 10.1016/0166-9834(91)80082-8
{"title":"Calendar of forthcoming events","authors":"","doi":"10.1016/0166-9834(91)80082-8","DOIUrl":"https://doi.org/10.1016/0166-9834(91)80082-8","url":null,"abstract":"","PeriodicalId":8091,"journal":{"name":"Applied Catalysis","volume":"77 2","pages":"Page N24"},"PeriodicalIF":0.0,"publicationDate":"1991-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0166-9834(91)80082-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136577280","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}
引用次数: 0
Carbonylation 羰基化反应
Applied Catalysis Pub Date : 1991-10-15 DOI: 10.1016/0166-9834(91)80078-B
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引用次数: 0
Yield, catalysis and the meaning of life 产量,催化和生命的意义
Applied Catalysis Pub Date : 1991-10-15 DOI: 10.1016/0166-9834(91)80076-9
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引用次数: 0
Catalytic activity and product distribution in the cracking of C6-C8 alkenes on the ammonium salt of 12-tungstophosphoric acid 12-钨磷酸铵盐催化C6-C8烯烃裂解活性及产物分布
Applied Catalysis Pub Date : 1991-10-15 DOI: 10.1016/0166-9834(91)80070-D
Vikram S. Nayak, John B. Moffat *
{"title":"Catalytic activity and product distribution in the cracking of C6-C8 alkenes on the ammonium salt of 12-tungstophosphoric acid","authors":"Vikram S. Nayak,&nbsp;John B. Moffat *","doi":"10.1016/0166-9834(91)80070-D","DOIUrl":"10.1016/0166-9834(91)80070-D","url":null,"abstract":"<div><p>The cracking of C<sub>6</sub>-C<sub>8</sub> alkenes has been studied on the ammonium salt of 12-tungstophosphoric acid ( NH<sub>4</sub>PW ). The products range from C<sub>3</sub> hydrocarbons to aromatics, the latter appearing in amounts up to 30% of the products. The primary products from the alkenes provide strong evidence that condensation processes are strongly favoured on these catalysts. The cracking ability of the catalyst decreases rapidly with time on stream but attains a steady state after approximately three hours. The activity of the catalyst is shown to be dependent on the source of the ammonium ion employed in the preparation of the salt with the activity of NH<sub>4</sub>PW for hezene cracking decreasing in the order NH<sub>4</sub>Cl &gt; NH<sub>4</sub>NO<sub>3</sub> &gt; (NH<sub>4</sub>)<sub>2</sub>CO<sub>3</sub> &gt; (NH<sub>4</sub>)<sub>2</sub>SO<sub>4</sub>. The cracking activity of NH<sub>4</sub>PW for the C<sub>6</sub>-C<sub>8</sub> alkenes decreases in the order: octenes &gt; heptenes &gt; hexenes.</p></div>","PeriodicalId":8091,"journal":{"name":"Applied Catalysis","volume":"77 2","pages":"Pages 251-268"},"PeriodicalIF":0.0,"publicationDate":"1991-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0166-9834(91)80070-D","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73539886","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}
引用次数: 5
Comparative loss of alkali promoter by desorption from two catalysts for the dehydrogenation of ethyl benzene to styrene 乙苯脱氢制苯乙烯两种催化剂解吸碱促进剂的比较损失
Applied Catalysis Pub Date : 1991-10-15 DOI: 10.1016/0166-9834(91)80068-8
Klas Engvall, Leif Holmlid *, P. Govind Menon
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引用次数: 26
Gallium, aluminium and mixed gallium-aluminium pillared montmorillonite 镓、铝及混合镓铝柱蒙脱土
Applied Catalysis Pub Date : 1991-10-15 DOI: 10.1016/0166-9834(91)80073-6
Antonio Vieira Coelho, Georges Poncelet *
{"title":"Gallium, aluminium and mixed gallium-aluminium pillared montmorillonite","authors":"Antonio Vieira Coelho,&nbsp;Georges Poncelet *","doi":"10.1016/0166-9834(91)80073-6","DOIUrl":"10.1016/0166-9834(91)80073-6","url":null,"abstract":"<div><p>Pillaring of montmorillonite was achieved with partially hydrolysed solutions of gallium, gallium-aluminium and aluminium. The development of 18Åspcacings was investigated in relation with the OH/M<sup>3+</sup> molar ratio, the amount of pillaring solution and the molar composition of the mixed solutions. With respect to Al-pillared clays, Ga- and Ga-Al-pulared montmorillonites exhibit similar behaviour toward heat treatment. They also have similar specific surface areas and pore volumes. IR spectroscopy of adsorbed pyridine show that both Bronsted and Lewis acidities are present, the former being slightly less developed in the Ga-pillared sample than in the aluminium analogue.</p></div>","PeriodicalId":8091,"journal":{"name":"Applied Catalysis","volume":"77 2","pages":"Pages 303-314"},"PeriodicalIF":0.0,"publicationDate":"1991-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0166-9834(91)80073-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82709275","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}
引用次数: 38
Influence of metal loading on the reducibility and hydrogenation activity of cobalt/alumina catalysts 金属负载对钴/氧化铝催化剂还原性和加氢活性的影响
Applied Catalysis Pub Date : 1991-10-15 DOI: 10.1016/0166-9834(91)80067-7
Wei-Jye Wang, Yu-Wen Chen *
{"title":"Influence of metal loading on the reducibility and hydrogenation activity of cobalt/alumina catalysts","authors":"Wei-Jye Wang,&nbsp;Yu-Wen Chen *","doi":"10.1016/0166-9834(91)80067-7","DOIUrl":"10.1016/0166-9834(91)80067-7","url":null,"abstract":"<div><p>A series of Co/Al<sub>2</sub>O<sub>3</sub> catalysts with various metal loadings were prepared by incipient-wetness impregnation. The reducibility of cobalt oxide in these samples was investigated by the temperature-programmed reduction technique. The results show that for catalysts with low cobalt loadings the cobalt phase is present primarily as CoAl<sub>2</sub>O<sub>4</sub>. For catalysts having high cobalt contents, bulk CO<sub>3</sub>O<sub>4</sub> is observed. However, some cobalt oxide-cobalt aluminate interaction exists. The rate of reduction of cobalt oxide on the support depends not only on the chemical nature of the species but also on the rate of nucleation. At high cobalt loadings, due to the presence of easy-to-reduce cobalt species, the rate of reduction is enhanced. Carbon monoxide hydrogenation activity measurements indicate that the activity is likely to be associated with the presence of easy-to-reduce species. However, the effects of particle size and pore blocking cannot be ruled out.</p></div>","PeriodicalId":8091,"journal":{"name":"Applied Catalysis","volume":"77 2","pages":"Pages 223-233"},"PeriodicalIF":0.0,"publicationDate":"1991-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0166-9834(91)80067-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80265712","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}
引用次数: 167
Catalysis and materials science: ‘through the glass darkly’ 催化与材料科学:“透过黑暗的玻璃”
Applied Catalysis Pub Date : 1991-10-15 DOI: 10.1016/0166-9834(91)80083-9
Graham J. Hutchings
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引用次数: 0
High resolution solid-state1H nuclear magnetic resonance spectra of organic template in hydrated aluminophosphate VPI-5 水合磷酸铝-5中有机模板的高分辨率固态1h核磁共振谱
Applied Catalysis Pub Date : 1991-10-15 DOI: 10.1016/0166-9834(91)80062-2
Waclaw Kolodziejski , Joa˜o Rocha, Heyong He, Jacek Klinowski *
{"title":"High resolution solid-state1H nuclear magnetic resonance spectra of organic template in hydrated aluminophosphate VPI-5","authors":"Waclaw Kolodziejski ,&nbsp;Joa˜o Rocha,&nbsp;Heyong He,&nbsp;Jacek Klinowski *","doi":"10.1016/0166-9834(91)80062-2","DOIUrl":"10.1016/0166-9834(91)80062-2","url":null,"abstract":"<div><p>A spin-lock pulse sequence has been used in solid-state<sup>1</sup>H NMR to suppress the dominant water signal and to observe, under magic-angle spinning, very narrow signals of di-n-propylamine template in the hydrated molecular sieve VPI-5. Results suggest that the technique can be extended to the study of other molecular sieves.</p></div>","PeriodicalId":8091,"journal":{"name":"Applied Catalysis","volume":"77 2","pages":"Pages L1-L8"},"PeriodicalIF":0.0,"publicationDate":"1991-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0166-9834(91)80062-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86779939","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}
引用次数: 8
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