Search: onr:"swepub:oai:lup.lub.lu.se:2c40b554-1806-4ec8-9e75-d45c73226aa4" >
Direct Propane Ammo...
-
Andersson, ArneLund University,Lunds universitet,Avdelningen för kemiteknik,Institutionen för processteknik och tillämpad biovetenskap,Institutioner vid LTH,Lunds Tekniska Högskola,Division of Chemical Engineering,Department of Process and Life Science Engineering,Departments at LTH,Faculty of Engineering, LTH
(author)
Direct Propane Ammoxidation to Acrylonitrile: Kinetics and Nature of the Active Phase
- Article/chapterEnglish1993
Publisher, publication year, extent ...
Numbers
-
LIBRIS-ID:oai:lup.lub.lu.se:2c40b554-1806-4ec8-9e75-d45c73226aa4
-
https://lup.lub.lu.se/record/2018445URI
-
https://doi.org/10.1016/S0167-2991(08)64049-5DOI
Supplementary language notes
-
Language:English
-
Summary in:English
Part of subdatabase
Classification
-
Subject category:kon swepub-publicationtype
-
Subject category:ref swepub-contenttype
Notes
-
The kinetics of the direct synthesis of acrylonitrile from propane on V-Sb-Al-(W) mixed oxides indicate that acrylonitrile (ACN) forms by two parallel pathways, one directly from propane and the second, which is the prevalent path, through the intermediate formation of propylene (C3=). The limiting factor in the formation of ACN is the relative slowness of the step of allylic oxidation to ACN of the intermediate C3=, and the higher rate of C3= oxidation to carbon oxides as compared to that of ACN to COx. The step of C3= oxidation to ACN is controlled by the surface availability of NH3 which, in turn, depends considerably on the side reaction of NH3 oxidation to N2. The catalytic behavior of different modified V-Sb-(Al)-O systems and their characterization by X-ray diffraction analysis and Raman, Infrared and X-ray Photoelectron spectroscopies indicate that i) a reduction of both V and Sb occurs during the catalytic reaction, ii) the presence of vanadium not stabilized in the rutile-like phase is responsible for the side reaction of NH3 oxidation and lowering of the selectivity, iii) alumina reacts with antimony forming an AlSbO4 rutile phase which could be epitaxially intergrown or in solid solution with the VSbO4/Sb2O4 system, which, in turn, limits the presence of not stabilized (unselective) vanadium species, and iv) antimony oxide supported on alumina is also selective in propane ammoxidation, but forming acetonitrile as the main product. The doping with vanadium of this sample increases slightly the activity, but especially gives rise to the formation of acrylonitrile instead of acetonitrile.
Subject headings and genre
Added entries (persons, corporate bodies, meetings, titles ...)
-
Andersson, S L T
(author)
-
Centi, G
(author)
-
Grasselli, R K
(author)
-
Sanati, MehriLund University,Lunds universitet,Ergonomi och aerosolteknologi,Institutionen för designvetenskaper,Institutioner vid LTH,Lunds Tekniska Högskola,Ergonomics and Aerosol Technology,Department of Design Sciences,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)desi-msa
(author)
-
Trifiro, F
(author)
-
Guczi et al, L
(editor)
-
Avdelningen för kemiteknikInstitutionen för processteknik och tillämpad biovetenskap
(creator_code:org_t)
Related titles
-
In:New Frontiers in Catalysis (Studies in Surface Science and Catalysis )75, s. 691-7050167-2991
Internet link
Find in a library
To the university's database