Matches in SemOpenAlex for { <https://semopenalex.org/work/W1750446421> ?p ?o ?g. }
Showing items 1 to 69 of
69
with 100 items per page.
- W1750446421 abstract "This thesis aimed at developing heterogeneous catalysts for the esterification of oleic acid (OA) with trimethylolpropane (TMP) to produce an automotive bio-lubricant -trimethylolpropane trioleate (TMPTO). Four groups of catalysts were studied: 1) heteropolyacids (HPA) immobilized onto silica; 2) macroporous Si(HIPE) functionalized with different species (HPA, SO3H-/PO3H2-, zirconium phosphates); 3) functionalized magnetic nanoparticles (MNP); and 4) commercial cation ion-exchange resins. Precisely, we developed a method for the strong immobilization of the HPA onto silica via a link of zirconia and obtained stable-toward-leaching catalysts (first group of catalysts) which can be easily recycled for the further uses. The Si(HIPE)-materials (second group) have convenient shape that makes them easy to operate but they inhibited the reaction due to entrapment of the reagents and products inside their small pores. The work dedicated to MNP (third group) investigated different approaches to protect MNP for the use at the low pH. We found that silica coating of MNP as well as organic silane grafting promote the MNP stability. The surface of coated and grafted MNP was then modified with sulfonic moieties. The MNP-catalysts are recoverable by magnet, active and recyclable. Concerning the ion-exchange resins (fourth group), they possess unique stability and recyclability showing potential for the industrial applications. For the gel-type resin, a so-called “pre-swelling” step was developed to increase the productivity of the resin. We also found that the resins catalyze the formation of mono- and diesters, whereas the final triester is generated thanks to the action of acidity from the residual OA at the high temperature of the system. A cooperative scenario between heterogeneous and homogeneous catalysis is proposed for operating the industrial reaction starting with an ion-exchange resin at low temperature and completing it at higher temperature to obtain the triester." @default.
- W1750446421 created "2016-06-24" @default.
- W1750446421 creator A5086238103 @default.
- W1750446421 date "2015-03-09" @default.
- W1750446421 modified "2023-09-27" @default.
- W1750446421 title "Heterogeneous acid catalysts for esterification in oleochemistry" @default.
- W1750446421 hasPublicationYear "2015" @default.
- W1750446421 type Work @default.
- W1750446421 sameAs 1750446421 @default.
- W1750446421 citedByCount "0" @default.
- W1750446421 crossrefType "dissertation" @default.
- W1750446421 hasAuthorship W1750446421A5086238103 @default.
- W1750446421 hasConcept C127413603 @default.
- W1750446421 hasConcept C159390177 @default.
- W1750446421 hasConcept C159750122 @default.
- W1750446421 hasConcept C161790260 @default.
- W1750446421 hasConcept C178790620 @default.
- W1750446421 hasConcept C185592680 @default.
- W1750446421 hasConcept C192562407 @default.
- W1750446421 hasConcept C2776949262 @default.
- W1750446421 hasConcept C2778024649 @default.
- W1750446421 hasConcept C2779578285 @default.
- W1750446421 hasConcept C39432304 @default.
- W1750446421 hasConcept C40875361 @default.
- W1750446421 hasConcept C42360764 @default.
- W1750446421 hasConcept C73523448 @default.
- W1750446421 hasConcept C90982505 @default.
- W1750446421 hasConceptScore W1750446421C127413603 @default.
- W1750446421 hasConceptScore W1750446421C159390177 @default.
- W1750446421 hasConceptScore W1750446421C159750122 @default.
- W1750446421 hasConceptScore W1750446421C161790260 @default.
- W1750446421 hasConceptScore W1750446421C178790620 @default.
- W1750446421 hasConceptScore W1750446421C185592680 @default.
- W1750446421 hasConceptScore W1750446421C192562407 @default.
- W1750446421 hasConceptScore W1750446421C2776949262 @default.
- W1750446421 hasConceptScore W1750446421C2778024649 @default.
- W1750446421 hasConceptScore W1750446421C2779578285 @default.
- W1750446421 hasConceptScore W1750446421C39432304 @default.
- W1750446421 hasConceptScore W1750446421C40875361 @default.
- W1750446421 hasConceptScore W1750446421C42360764 @default.
- W1750446421 hasConceptScore W1750446421C73523448 @default.
- W1750446421 hasConceptScore W1750446421C90982505 @default.
- W1750446421 hasLocation W17504464211 @default.
- W1750446421 hasOpenAccess W1750446421 @default.
- W1750446421 hasPrimaryLocation W17504464211 @default.
- W1750446421 hasRelatedWork W1434454904 @default.
- W1750446421 hasRelatedWork W1915830686 @default.
- W1750446421 hasRelatedWork W1981513015 @default.
- W1750446421 hasRelatedWork W1991801429 @default.
- W1750446421 hasRelatedWork W2016516229 @default.
- W1750446421 hasRelatedWork W2031751643 @default.
- W1750446421 hasRelatedWork W2039115005 @default.
- W1750446421 hasRelatedWork W2045296403 @default.
- W1750446421 hasRelatedWork W2073620823 @default.
- W1750446421 hasRelatedWork W2074342337 @default.
- W1750446421 hasRelatedWork W2088581266 @default.
- W1750446421 hasRelatedWork W2099104934 @default.
- W1750446421 hasRelatedWork W2343680148 @default.
- W1750446421 hasRelatedWork W2530262630 @default.
- W1750446421 hasRelatedWork W2794521909 @default.
- W1750446421 hasRelatedWork W2965825935 @default.
- W1750446421 hasRelatedWork W3007298031 @default.
- W1750446421 hasRelatedWork W3021518668 @default.
- W1750446421 hasRelatedWork W3087440119 @default.
- W1750446421 hasRelatedWork W3193369394 @default.
- W1750446421 isParatext "false" @default.
- W1750446421 isRetracted "false" @default.
- W1750446421 magId "1750446421" @default.
- W1750446421 workType "dissertation" @default.