ACIDITY OF H3PW12O40/SiO2 AND CATALYTIC ACTIVITY OF a -PINENE
The isomerization reaction in liquid phase of a -pinene in camphene catalyzed by tungstophosphoric acid supported on silica is studied. The catalyst is characterized with FT-IR and XRD to establish if the tungstophosphoric acid maintains the Keggin structure after being supported. The catalyst acidi...
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| Lenguaje: | English |
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Sociedad Chilena de Química
2003
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| Acceso en línea: | http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072003000400016 |
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oai:scielo:S0717-970720030004000162004-04-26ACIDITY OF H3PW12O40/SiO2 AND CATALYTIC ACTIVITY OF a -PINENEMasini,OmarGrzona,LilianaComelli,NoraPonzi,EstherPonzi,Marta a -pinene camphene acid catalysts tungstophosphoric acid isomerization The isomerization reaction in liquid phase of a -pinene in camphene catalyzed by tungstophosphoric acid supported on silica is studied. The catalyst is characterized with FT-IR and XRD to establish if the tungstophosphoric acid maintains the Keggin structure after being supported. The catalyst acidity exposed to different thermal treatments was determined by using FT-IR and TPD techniques of ammonia adsorbed. Two types of sites are distinguished, weak acid sites and strong acid sites. The weak acid sites concentration increases with the thermal treatment and can be responsible for the selectivity decrease in camphene by formation of products of higher molecular weight, while the strong acid sites concentration remains almost constant affecting in a lesser degree the obtention of monocyclic compoundsinfo:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.48 n.4 20032003-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072003000400016en10.4067/S0717-97072003000400016 |
| institution |
Scielo Chile |
| collection |
Scielo Chile |
| language |
English |
| topic |
a -pinene camphene acid catalysts tungstophosphoric acid isomerization |
| spellingShingle |
a -pinene camphene acid catalysts tungstophosphoric acid isomerization Masini,Omar Grzona,Liliana Comelli,Nora Ponzi,Esther Ponzi,Marta ACIDITY OF H3PW12O40/SiO2 AND CATALYTIC ACTIVITY OF a -PINENE |
| description |
The isomerization reaction in liquid phase of a -pinene in camphene catalyzed by tungstophosphoric acid supported on silica is studied. The catalyst is characterized with FT-IR and XRD to establish if the tungstophosphoric acid maintains the Keggin structure after being supported. The catalyst acidity exposed to different thermal treatments was determined by using FT-IR and TPD techniques of ammonia adsorbed. Two types of sites are distinguished, weak acid sites and strong acid sites. The weak acid sites concentration increases with the thermal treatment and can be responsible for the selectivity decrease in camphene by formation of products of higher molecular weight, while the strong acid sites concentration remains almost constant affecting in a lesser degree the obtention of monocyclic compounds |
| author |
Masini,Omar Grzona,Liliana Comelli,Nora Ponzi,Esther Ponzi,Marta |
| author_facet |
Masini,Omar Grzona,Liliana Comelli,Nora Ponzi,Esther Ponzi,Marta |
| author_sort |
Masini,Omar |
| title |
ACIDITY OF H3PW12O40/SiO2 AND CATALYTIC ACTIVITY OF a -PINENE |
| title_short |
ACIDITY OF H3PW12O40/SiO2 AND CATALYTIC ACTIVITY OF a -PINENE |
| title_full |
ACIDITY OF H3PW12O40/SiO2 AND CATALYTIC ACTIVITY OF a -PINENE |
| title_fullStr |
ACIDITY OF H3PW12O40/SiO2 AND CATALYTIC ACTIVITY OF a -PINENE |
| title_full_unstemmed |
ACIDITY OF H3PW12O40/SiO2 AND CATALYTIC ACTIVITY OF a -PINENE |
| title_sort |
acidity of h3pw12o40/sio2 and catalytic activity of a -pinene |
| publisher |
Sociedad Chilena de Química |
| publishDate |
2003 |
| url |
http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072003000400016 |
| work_keys_str_mv |
AT masiniomar acidityofh3pw12o40sio2andcatalyticactivityofapinene AT grzonaliliana acidityofh3pw12o40sio2andcatalyticactivityofapinene AT comellinora acidityofh3pw12o40sio2andcatalyticactivityofapinene AT ponziesther acidityofh3pw12o40sio2andcatalyticactivityofapinene AT ponzimarta acidityofh3pw12o40sio2andcatalyticactivityofapinene |
| _version_ |
1718445332203831296 |