Catalysis for Sustainable Energy最新文献_第5页

Niobia supported on silica as a catalyst for Biodiesel production from waste oil 二氧化硅负载铌作为废油生产生物柴油的催化剂

Catalysis for Sustainable Energy Pub Date : 2015-04-30 DOI: 10.1515/cse-2015-0002

R. Tesser, R. Vitiello, G. Carotenuto, C. García Sancho, A. Vergara, P. Maireles Torres, Changzhu Li, M. Di Serio

{"title":"Niobia supported on silica as a catalyst for Biodiesel production from waste oil","authors":"R. Tesser, R. Vitiello, G. Carotenuto, C. García Sancho, A. Vergara, P. Maireles Torres, Changzhu Li, M. Di Serio","doi":"10.1515/cse-2015-0002","DOIUrl":"https://doi.org/10.1515/cse-2015-0002","url":null,"abstract":"Abstract The activity and stability of niobia supported on silica catalyst have been tested in continuous micro-pilot reactors, for biodiesel production starting from acid vegetable oils. A catalyst was prepared by the impregnation of silica pellets with a loading of 12% of Nb and was extensively characterized. The activity of this catalyst in both esterification and transesterification was tested in a continuous micro-pilot laboratory plant in which acid oil was fed (FFA 10% w/w) at a temperature of 220°C and at a pressure of 60 bar. The niobia based catalyst resulted in a very active catalyst in both esterification (FFA conversion = 95-90%) and transesterification reactions (FAME yield = 80-90%), and the activity remained quite constant for more than 100 h on stream. Notwithstanding this stability, a non-negligible leaching phenomena has been detected, in the case of long-time continuous runs, as the Nb concentration on the spent catalyst resulted lower than that on the fresh one. The obtained result confirms that the leaching of the active specie is one of the most strong problem in heterogeneous catalysis for biodiesel production.","PeriodicalId":9642,"journal":{"name":"Catalysis for Sustainable Energy","volume":"108 1","pages":"33 - 42"},"PeriodicalIF":0.0,"publicationDate":"2015-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87014082","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

Use of Natural Nanotubes of Halloysite Clay for Thermochemical Conversion of Cottonseed Oil 高岭土天然纳米管在棉籽油热化学转化中的应用

Catalysis for Sustainable Energy Pub Date : 2015-01-18 DOI: 10.1515/cse-2015-0001

T. Mammadova, N. Hasankhanova, Kh.Sh. Teyubov, E. N. Askerova, T. Latifova, V. Abbasov

引用次数: 2

Modeling of ethylbenzene dehydrogenation in catalytic membrane reactor with porous membrane 多孔膜催化膜反应器中乙苯脱氢的模拟

Catalysis for Sustainable Energy Pub Date : 2014-02-24 DOI: 10.2478/cse-2014-0001

E. Shelepova, A. A. Vedyagin, I. Mishakov, A. Noskov

引用次数: 13

Ni(Co)-containing catalysts based on perovskite-like ferrites for steam reforming of ethanol 基于类钙钛矿铁氧体的含镍(Co)乙醇蒸汽重整催化剂

Catalysis for Sustainable Energy Pub Date : 2014-02-24 DOI: 10.2478/cse-2014-0002

M. Arapova, S. Pavlova, V. Rogov, T. Krieger, A. Ishchenko, A. Roger

{"title":"Ni(Co)-containing catalysts based on perovskite-like ferrites for steam reforming of ethanol","authors":"M. Arapova, S. Pavlova, V. Rogov, T. Krieger, A. Ishchenko, A. Roger","doi":"10.2478/cse-2014-0002","DOIUrl":"https://doi.org/10.2478/cse-2014-0002","url":null,"abstract":"Abstract For two series of catalysts based on praseodymium ferrite, their structural and redox properties as well as performance in ethanol steam reforming have been studied. The first series was PrFe1-xNi(Co)xO3 (x=0.3-0.4) perovskites prepared by modified Pechini route, and the second one was 5%wt.Ni(Co)/PrFeO3 of different dispersion prepared by impregnation of PrFeO3, including samples modified by 5%wt. Mo. At temperatures above 700°C, for all catalysts, the main products were hydrogen and CO. At temperatures below 700°C, initial ethanol conversion and hydrogen yield were higher for supported catalysts as compared with ones derived from Ni(Co)-containing perovskites. While Ni-based catalysts derived from perovskite were more active as compared with Co-based samples, Co-supported PrFeO3 perovskite has shown a higher initial activity as compared with Ni-supported one. The long-term tests in the realistic feed and TEM studies of spent catalysts revealed that perovskite-derived catalysts have a higher coking stability than perovskite-supported ones due to formation of highly dispersed Ni-Fe alloy particles strongly interacting with disordered perovskite–like matrix. The method of Mo supporting only slightly affects the initial activity of Ni/PrFeO3–based catalysts but noticeably modifies their coking stability: 5%Mo/5%Ni/PrFeO3 catalyst prepared by successive impregnation possesses the highest stability among perovskite-supported catalysts.","PeriodicalId":9642,"journal":{"name":"Catalysis for Sustainable Energy","volume":"33 1","pages":"10 - 20"},"PeriodicalIF":0.0,"publicationDate":"2014-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76900482","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: 10

Colloidal catalysts on the base of iron(3+) oxides for oxidative treatment of biomass 基于氧化铁(3+)的生物质氧化处理胶体催化剂

Catalysis for Sustainable Energy Pub Date : 2014-02-24 DOI: 10.2478/cse-2014-0003

O. Kasaikina, V. I. Lesin, L. M. Pisarenko

{"title":"Colloidal catalysts on the base of iron(3+) oxides for oxidative treatment of biomass","authors":"O. Kasaikina, V. I. Lesin, L. M. Pisarenko","doi":"10.2478/cse-2014-0003","DOIUrl":"https://doi.org/10.2478/cse-2014-0003","url":null,"abstract":"Abstract The analysis of the chemical nature of wood waste processing by fungus and bacteria was the starting point for innovative production of a new, relatively simple, colloidal catalytic system based on iron (III) oxides, combined with environmentally friendly oxidants - hydrogen peroxide and/or atmospheric oxygen. Colloidal iron(III) oxides, obtained by hydrolysis of Fe(III) salts in water in the presence of surfactants, catalyze the oxidative destruction of lignocellulosic biomass under atmospheric pressure, at a mild temperature range of 60-70oC, under the influence of H2O2 and O2. The oxidative destruction of biomass (wood sawdust, peat, olive press cake, oat straw) results in formation of light organic acids, esters and other low molecular oxidation products derived from lignin, hemicelluloses, cellulose, lipoproteins and sugars; the solid product constitutes mainly of cellulose and its derivatives. The yield of solid residue depends on biomass nature, reagents concentration ratio (biomass, catalyst, hydrogen peroxide), and oxidation process duration. Water solution of organic acids and esters can be used in agriculture for fodder processing.","PeriodicalId":9642,"journal":{"name":"Catalysis for Sustainable Energy","volume":"28 1","pages":"21 - 27"},"PeriodicalIF":0.0,"publicationDate":"2014-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75109340","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: 2