Naphthenic acid removal from heavy oils on alkaline earth-metal oxides and ZnO catalysts

Comparison of catalytic pyrolysis of biomass with MCM-41 and CaO catalysts by using TGA–FTIR analysis

“…However, it was reported that the use of base materials such as cheap dolomite and limestone could be more beneficial in upgrading pyrolysis oils to obtain better liquid yields [18]. Moreover, Ding et al [19] showed that CaO catalyst could enhance the catalytic decarboxylation by converting the acid compounds to hydrocarbons. Therefore, CaO may be a good catalyst for catalytic upgrading of bio-oils.…”

Extraction of naphthenic acid from highly acidic oil using phenolate based ionic liquids

“…The activity coefficient of the solutes in the ionic liquids depends on the alkyl spacer length of the imidazolium cation. The order of the activity coefficient of the naphthenic acids and dodecane follows the order of [C 12 6 . This shows the interaction of the naphthenic acids with ionic liquids depends mainly on the alkyl chain length of the acids irrespective of its cyclic or acyclic nature.…”

“…The liquid-liquid extraction (LLE) and adsorptive recovery using ion exchange is a widely used laboratory method for recovery of naphthenic acid from crude oil [4,5]. Acidity reduction for highly acidic crude is achieved using thermal and catalytic decarboxylation [6,7]. The catalytic esterification using SnO/Al 2 O 3 had been used for crude oil as well as for the diesel streams [8,9].…”

Reducciã“n De La Acidez De Un Crudo De Petrã“leo Con Una Soluciã“n Alcohã“lica De Lãquido Iã“nico 2-Metilimidazol

“…Las plantas y unidades de procesamiento de petróleo están diseñadas de hierro, acero o aleaciones y los compuestos ácidos presentes en el petróleo actúan sobre estas superficies provocando deterioro, grietas y en el peor de los casos incendios y explosiones. [2][3][4][5][6].…”