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Raney type copper-zinc-aluminium catalyst for water-gas shift reaction 水气变换反应用Raney型铜锌铝催化剂
Applied Catalysis Pub Date : 1991-11-12 DOI: 10.1016/0166-9834(91)80106-7
A. Andreev, V. Kafedjiiski, T. Halachev, B. Kunev, M. Kaltchev
{"title":"Raney type copper-zinc-aluminium catalyst for water-gas shift reaction","authors":"A. Andreev, V. Kafedjiiski, T. Halachev, B. Kunev, M. Kaltchev","doi":"10.1016/0166-9834(91)80106-7","DOIUrl":"https://doi.org/10.1016/0166-9834(91)80106-7","url":null,"abstract":"","PeriodicalId":8091,"journal":{"name":"Applied Catalysis","volume":"26 1","pages":"199-211"},"PeriodicalIF":0.0,"publicationDate":"1991-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85855160","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: 30
Influence of platinum dispersion on the ethane aromatization on Pt/H-ZSM-5 zeolites 铂分散对Pt/H-ZSM-5分子筛乙烷芳构化的影响
Applied Catalysis Pub Date : 1991-11-12 DOI: 10.1016/0166-9834(91)80110-I
W. Reschetilowski, U. Mroczek, K. Steinberg, K. Wendlandt
{"title":"Influence of platinum dispersion on the ethane aromatization on Pt/H-ZSM-5 zeolites","authors":"W. Reschetilowski, U. Mroczek, K. Steinberg, K. Wendlandt","doi":"10.1016/0166-9834(91)80110-I","DOIUrl":"https://doi.org/10.1016/0166-9834(91)80110-I","url":null,"abstract":"","PeriodicalId":8091,"journal":{"name":"Applied Catalysis","volume":"42 1","pages":"257-264"},"PeriodicalIF":0.0,"publicationDate":"1991-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74212796","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: 18
Production of spherical granules of alumina with controlled porous structure 可控多孔结构氧化铝球形颗粒的制备
Applied Catalysis Pub Date : 1991-11-12 DOI: 10.1016/0166-9834(91)80104-5
M.N. Shepeleva *, R.A. Shkrabina, V.B. Fenelonov, Z.R. Ismagilov
{"title":"Production of spherical granules of alumina with controlled porous structure","authors":"M.N. Shepeleva *,&nbsp;R.A. Shkrabina,&nbsp;V.B. Fenelonov,&nbsp;Z.R. Ismagilov","doi":"10.1016/0166-9834(91)80104-5","DOIUrl":"https://doi.org/10.1016/0166-9834(91)80104-5","url":null,"abstract":"<div><p>Structural changes of aluminium hydroxides at main technological stages are studied to produce spherical alumina with a given volume of pores. Two hydroxides essentially different in morphology, particle size and type of bond between primary particles have been synthesized. A collected of alumina with varied volumes of pores and effective radii has been obtained using a mixture of hydroxides of both types. We show how to calculate the volumes of meso- and macropores as well as the specific surface area of alumina and its precursors on the basis of the characteristics of each hydroxide and their ratio in the mixture.</p></div>","PeriodicalId":8091,"journal":{"name":"Applied Catalysis","volume":"78 2","pages":"Pages 175-184"},"PeriodicalIF":0.0,"publicationDate":"1991-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0166-9834(91)80104-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91731129","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: 9
Zeolite-encapsulated metal complexes: blomimetic catalysts 沸石包封金属配合物:拟沸石催化剂
Applied Catalysis Pub Date : 1991-11-12 DOI: 10.1016/0166-9834(91)80115-D
{"title":"Zeolite-encapsulated metal complexes: blomimetic catalysts","authors":"","doi":"10.1016/0166-9834(91)80115-D","DOIUrl":"https://doi.org/10.1016/0166-9834(91)80115-D","url":null,"abstract":"","PeriodicalId":8091,"journal":{"name":"Applied Catalysis","volume":"78 2","pages":"Pages N16-N17"},"PeriodicalIF":0.0,"publicationDate":"1991-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0166-9834(91)80115-D","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91625601","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
Hydrogenation activity and selectivity of cobalt borides 钴硼化物的加氢活性和选择性
Applied Catalysis Pub Date : 1991-11-12 DOI: 10.1016/0166-9834(91)80105-6
Y.Z. Chen , K.J. Wu
{"title":"Hydrogenation activity and selectivity of cobalt borides","authors":"Y.Z. Chen ,&nbsp;K.J. Wu","doi":"10.1016/0166-9834(91)80105-6","DOIUrl":"https://doi.org/10.1016/0166-9834(91)80105-6","url":null,"abstract":"<div><p>Hydrogenation of monofunctional (olefinic and carbonyl) and bifunctional (α, β-unsaturated aldehyde) compounds have been studied over cobalt borides. The cobalt borides P-ICo and P-2WCo were prepared by reducing cobalt acetate with sodium borohydride in aqueous and 50% ethanolic media, respectively. P-1Co is more active than P-2WCo for hydrogenation of olefinic groups, whereas P-1Co is less active for carbonyl groups. Chromium and molybdenum effectively promote P-1Co and P-2WCo in carbonyl group reduction, but chromium depresses P-1Co and P-2WCo on olefinic group reduction. P1Co and P-2WCo can selectively reduce benzene to cyclohexene and α, β-unsaturated aldehyde to unsaturated alcohol, reactions that are difficult on other heterogeneous catalysts.</p></div>","PeriodicalId":8091,"journal":{"name":"Applied Catalysis","volume":"78 2","pages":"Pages 185-197"},"PeriodicalIF":0.0,"publicationDate":"1991-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0166-9834(91)80105-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90030004","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: 35
Vanadia/titania catalysts in selective catalytic reduction of nitric oxide with ammonia 钒/钛催化剂在氨选择性催化还原一氧化氮中的应用
Applied Catalysis Pub Date : 1991-11-12 DOI: 10.1016/0166-9834(91)80109-A
Yeping Cai, Umit S. Ozkan *
{"title":"Vanadia/titania catalysts in selective catalytic reduction of nitric oxide with ammonia","authors":"Yeping Cai,&nbsp;Umit S. Ozkan *","doi":"10.1016/0166-9834(91)80109-A","DOIUrl":"https://doi.org/10.1016/0166-9834(91)80109-A","url":null,"abstract":"<div><p>Selective catalytic reduction (SCR) of nitric oxide with ammonia was investigated over both phases of titania (Anatase and Rutile). All catalysts were characterized using BET surface area measurement, X-ray diffraction, in-situ and ambient laser Raman spectroscopy, X-ray photoelectron spectroscopy, and scanning electron microscopy techniques. A steady-state plug-flow reactor was used to investigate the effect of support material and catalyst loading on the catalytic activity. The activity of the catalysts supported over both anatase and rutile phases was found to go through a maximum with increasing vanadia loading. The catalysts supported over the rutile phase appeared to be more active on a unit surface area basis. At low catalyst loading levels, laser Raman spectroscopy showed the presence of polymeric vanadia surface species which are likely to be the active sites for the nitric oxide reduction reaction. For catalysts supported over the rutile phase, the presence of crystalline vanadium pentoxide did not seem to affect the catalytic activity significantly.</p></div>","PeriodicalId":8091,"journal":{"name":"Applied Catalysis","volume":"78 2","pages":"Pages 241-255"},"PeriodicalIF":0.0,"publicationDate":"1991-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0166-9834(91)80109-A","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91731062","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: 29
Carbon monoxide hydrogenation over iron oxide, subjected to shear deformation under high pressure: role of vacancies 一氧化碳氢化过氧化铁，在高压下受到剪切变形:空位的作用
Applied Catalysis Pub Date : 1991-11-12 DOI: 10.1016/0166-9834(91)80108-9
O.S. Morozova *, yu.v. Maksimov, D.P. Shashkin, P.A. Shirjaev, V.V. Matveyev, V.A. Zhorin, O.V. Krylov, G.N. Krjukova
{"title":"Carbon monoxide hydrogenation over iron oxide, subjected to shear deformation under high pressure: role of vacancies","authors":"O.S. Morozova *,&nbsp;yu.v. Maksimov,&nbsp;D.P. Shashkin,&nbsp;P.A. Shirjaev,&nbsp;V.V. Matveyev,&nbsp;V.A. Zhorin,&nbsp;O.V. Krylov,&nbsp;G.N. Krjukova","doi":"10.1016/0166-9834(91)80108-9","DOIUrl":"https://doi.org/10.1016/0166-9834(91)80108-9","url":null,"abstract":"<div><p>The formation of catalytically active structures m both “unloaded” polycrystalline α-Fe<sub>2</sub>O<sub>3</sub> and “loaded”, i.e. subjected to shear deformation under high pressure (SD+HP), was studied by “in situ” X-ray diffraction in an atmosphere of carbon monoxide and hydrogen, by transmission electron microscopy and by Mössbauer spectroscopy. Two main stages were observed in the activation process which correspond to different degrees of iron oxide reduction. The first stage (270–290°C ) was the reduction to nonstoichiometric magnetite, accompanied by carbon monoxide hydrogenation to saturated hydrocarbons. The second stage ( &gt; 300 °C ) was the deep reduction to nonstoichiometric magnetite and clusters of iron carbide, accompanied by the appearance of unsaturated hydrocarbons. The overall catalytic activity was shown to be a function of both total length of spinel-carbide phase boundaries and the topology of the interface. In the case of the “unloaded” sample the formation of intercalated particles of carbide phase with alternating spinel-carbide layers led to a higher activity than that of the “loaded” one. Loose aggregates of carbide particles formed on the “loaded” sample block up active centres on the spinel surface and reduce the total activity. The nature of active centres on the surface of nonstoichiometric magnetite is discussed.</p></div>","PeriodicalId":8091,"journal":{"name":"Applied Catalysis","volume":"78 2","pages":"Pages 227-239"},"PeriodicalIF":0.0,"publicationDate":"1991-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0166-9834(91)80108-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91731130","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: 12
Methylbutynol: a new and simple diagnostic tool for acidic and basic sites of solids 甲基丁醇:一个新的和简单的诊断工具，酸性和碱性的固体
Applied Catalysis Pub Date : 1991-11-12 DOI: 10.1016/0166-9834(91)80107-8
H. Lauron-Pernot *, F. Luck, J.M. Popa
{"title":"Methylbutynol: a new and simple diagnostic tool for acidic and basic sites of solids","authors":"H. Lauron-Pernot *,&nbsp;F. Luck,&nbsp;J.M. Popa","doi":"10.1016/0166-9834(91)80107-8","DOIUrl":"https://doi.org/10.1016/0166-9834(91)80107-8","url":null,"abstract":"<div><p>In order to characterize acid-base properties of a material surface under gas-phase reaction conditions, a new test reaction has been investigated. We have shown that 2-methyl-3-butyn-2-oĺundergoes dehydration over solid acid materials and gives acetone and acetylene over solid basic materials. These reactions are very sensitive to the usual modifications that can occur during catalyst preparation. Production of 3-hydroxy-3-methyl-2-butanone seems to be characteristic of amphoteric catalysts possessing acid-base ion pairs.</p></div>","PeriodicalId":8091,"journal":{"name":"Applied Catalysis","volume":"78 2","pages":"Pages 213-225"},"PeriodicalIF":0.0,"publicationDate":"1991-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0166-9834(91)80107-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90029994","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: 136
Influence of platinum dispersion on the ethane aromatization on Pt/H-ZSM-5 zeolites 铂分散对Pt/H-ZSM-5分子筛乙烷芳构化的影响
Applied Catalysis Pub Date : 1991-11-12 DOI: 10.1016/0166-9834(91)80110-I
W. Reschetilowski, U. Mroczek, K.-H. Steinberg, K.-P. Wendlandt
{"title":"Influence of platinum dispersion on the ethane aromatization on Pt/H-ZSM-5 zeolites","authors":"W. Reschetilowski,&nbsp;U. Mroczek,&nbsp;K.-H. Steinberg,&nbsp;K.-P. Wendlandt","doi":"10.1016/0166-9834(91)80110-I","DOIUrl":"https://doi.org/10.1016/0166-9834(91)80110-I","url":null,"abstract":"<div><p>The influence of the platinum dispersion and of the metal particle size distribution on the catalytic activity in the ethane aromatization over Pt/H-ZSM-5 zeolites was investigated at 823 K in a plug flow reactor. Comparatively high platinum dispersion and low average particle size caused by impregnation of the zeolite with ethanolic H<sub>2</sub>PtCl<sub>6</sub> solution lead to a close vicinity of metal and acid sites which is accompanied by an increased electrophilicity of the metal. Such a catalyst posesses a higher deactivation rate than those with more bulky platinum. The rapid deactivation is effected by a higher stability of the chemisorption complex metal-ethylene and by favouring of consecutive reactions of olefinic intermediates towards coke information.</p></div>","PeriodicalId":8091,"journal":{"name":"Applied Catalysis","volume":"78 2","pages":"Pages 257-264"},"PeriodicalIF":0.0,"publicationDate":"1991-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0166-9834(91)80110-I","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90029996","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: 18
Raney type copper-zinc-aluminium catalyst for water-gas shift reaction 水气变换反应用Raney型铜锌铝催化剂
Applied Catalysis Pub Date : 1991-11-12 DOI: 10.1016/0166-9834(91)80106-7
A. Andreev *, V. Kafedjiiski, T. Halachev, B. Kunev, M. Kaltchev
{"title":"Raney type copper-zinc-aluminium catalyst for water-gas shift reaction","authors":"A. Andreev *,&nbsp;V. Kafedjiiski,&nbsp;T. Halachev,&nbsp;B. Kunev,&nbsp;M. Kaltchev","doi":"10.1016/0166-9834(91)80106-7","DOIUrl":"https://doi.org/10.1016/0166-9834(91)80106-7","url":null,"abstract":"<div><p>The structure and the catalytic activity in the water-gas shift (WGS ) reaction of a Raney type copper-zinc-alummium catalyst has been studied. It has been established that after leaching of the alloy with alkali solution copper particles are formed, covered by a hydroxycarbonate film containing mainly a hydrotalcite like phase. Most probably this system is the precursor of the active sites, similar to the WGS catalysts obtained by coprecipitation. The Raney type catalysts manifested catalytic activity by an order of magnitude higher than that of the conventional coprecipitated catalysts. This could be explained by the formation of a complex catalytic system, containing a “polyelectrode” of a redox galvanic couple of copper ions, closed via the metal phase.</p></div>","PeriodicalId":8091,"journal":{"name":"Applied Catalysis","volume":"78 2","pages":"Pages 199-211"},"PeriodicalIF":0.0,"publicationDate":"1991-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0166-9834(91)80106-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90030005","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: 30
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