بررسي عملكرد تركيبات بازدارنده آلكيل بنزني بر كنترل تشكيل لخته اي آسفالتني سه نمونه نفتي ايران

Investigating the Effect of Alkyl-Benzene Inhibitors on Asphaltene Precipitation of Three Iranian Crude Oil

In this study the effects of dodecylbenzenesolfonic and dodecylresorcinol acids (as alkyl-benzene derivatives inhibitors) on asphaltene precipitation of three Iranian crude oil were investigated. Near infrared spectroscopy technique and heptane titration were used to detect the onset of asphaltene precipitation in presence and absence of inhibitors. The displacement of asphaltene precipitation at the presence of inhibitors was considered as the delay criteria of asphaltene formation and structural stability. The relation between structural parameters of asphaltene and onset precipitation displacement in presence of inhibitors was studied. The inhibition effect of dodecylbenzenesolfonic acid was revealed to be more effective than dodecylresorcinol in the three crude oil samples. The suitable concentration of dodecylbenzenesolfonic acid was measured as 500-1000 ppm. The onset precipitation displacement constantly decreases at higher concentrations in presence of both inhibitors.