Synthesis of polymer based catalyst: Optimization and kinetics modeling of the transesterification of Pistacia chinensis oil with diethyl carbonate using acidic ionic liquids.

• The PEI 10000 C 12 polymer ionic liquid was selected as the most efficient catalyst. • The mechanism of polymer ionic liquid catalyzed esterification/transesterification was clarified. • An emerging, efficient and green technology for ethyl ester production was developed. • Kinetics of ethyl esters has been investigated using Pistacia chinensis with polymer ionic liquid. • We examined the catalytic activity of structure and reusability of polymer ionic liquid. A novel solid acidic polymeric ionic liquid catalyst was synthesized for ethyl esters production via the esterification of oleic acid with ethanol, normally transesterification of Pistacia chinensis oil with diethyl carbonate. Gas chromatography-mass spectroscopy analysis was used to characterize the products and optimize the reaction conditions to provide P. chinensis oil derived ethyl esters in 93% yield. Kinetic studies performed at different temperatures revealed that the conversion of P. chinensis oil to an ethyl ester follows first order reaction kinetics. The properties of ethyl esters were determined, found to meet the ASTM D6751-02. Results revealed that the catalyst had perfect utility after several runs without much loss in activity. The mild conditions (1:5) P. chinensis oil:diethyl carbonate molar ratio, 300 wt% PIL loading, 120 °C, 400 rpm, 6 h, recyclability of the catalyst make the proposed synthesis a sustainable method for the development of ecofriendly, cost-effective biofuels. [ABSTRACT FROM AUTHOR]