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Zeeshan Rashid,Cecilia Devi Wilfred,Regupathi Iyyaswami,Arunagiri Appusamy,Murugesan Thanabalan 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.79 No.-
Dispersion of asphaltene in crude oil using ionic liquids (ILs) is being considered as a viable solution, inextraction and transportation processes. In this work, the interplay between asphaltene and ILs has beenstudied systematically to understand the effect of structural variation of ILs on asphaltene solubility. Theactivity coefficient of the total of 1517 ILs with different combinations of cation and anion of ILs forrepresentative asphaltene molecule (asphaltene) was estimated via COSMO-RS (Conductor-likeScreening Model for Real Solvents). COSMO_RS predictions were validated using experimental dataon asphaltene solubility. Among the studied ILs, asphaltene showed high solubility in imidazolium-basedILs with hydrophobic anions. The present approach paved a way forward to rationally understand theimpact of structural variation of ILs on their interaction with asphaltene molecule and to design new ILsfor the dispersion and stabilization of asphaltene.
Ariyanti Sarwono,Zakaria Man,Alamin Idris,Amir Sada Khan,Nawshad Muhammad,Cecilia Devi Wilfred 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.69 No.-
This paper provides complete loop of ionic liquid (IL) assisted glucose conversion to 5-hydroxymethylfurfural (HMF), nanofiltration membrane (NF) based separation and recyclability. The optimum HMF yield of 65.6% was obtained with 8 wt.% catalyst loading at 125 °C reaction temperature in 120 min reaction time. Ea for conversion was found to be 120 kJ/mol. NF was adopted first time to separate IL and HMF. The percentage of recovered HMF using NF for 1st, 2nd and 3rd batches are 94.87, 84.35 and 71.65 respectively. The structures of regenerated IL and HMF, obtained from NF and liquid–liquid extraction, were confirmed by NMR.