Thermodynamic study on carbon dioxide and methane permeability in polyvinylchloride/ionic liquid blends was written by Noorani, Narmin;Mehrdad, Abbas;Chakhmaghi, Farnoosh. And the article was included in Journal of Chemical Thermodynamics in 2020.Category: pyridine-derivatives This article mentions the following:
In the present study, to improve separation proficiency of polyvinyl chloride (PVC) membrane, polyvinyl chloride is combined with 1-butyl-4-methylpyridinium ionic liquids ([B4MPyr][X]) with different anions bromide, [Br]–, chloride, [Cl]–, thiocyanate, [SCN]–, and tetrafluoroborate, [BF4]. The prepared PVC/[B4MPyr][X] blend membranes were characterized by differential scanning calorimetry (DSC) analyses. The prepared membrane morphol. was investigated by Scanning Electron Microscope (SEM). The effects of feed pressure, temperature and, different of anions on the performance of blend membrane were surveyed. The results reveal that the permeability of methane and carbon dioxide gases in the PVC/[B4MPyr][X] blevapornd membranes were reduced with an increase in feed pressure while the ideal selectivity of CO2/CH4 was increased with an increase in feed pressure. Moreover, the permeability of CH4 and CO2 gases in the PVC/[B4MPyr][X] blend membranes are increased with an increase in temperatures while the ideal selectivity of CO2/CH4 was decreased with increasing temperatures Also, the PVC/[B4MPyr][SCN] membrane has a higher performance for the separation of CO2 and CH4 gases in comparing with others membranes. In the experiment, the researchers used many compounds, for example, 1-Butyl-4-methylpyridin-1-ium bromide (cas: 65350-59-6Category: pyridine-derivatives).
1-Butyl-4-methylpyridin-1-ium bromide (cas: 65350-59-6) belongs to pyridine derivatives. The ring atoms in the pyridine molecule are sp2-hybridized. The nitrogen is involved in the 锜?bonding aromatic system using its unhybridized p orbital. The lone pair is in an sp2 orbital, projecting outward from the ring in the same plane as the 锜?bonds. Several pyridine derivatives play important roles in biological systems. While its biosynthesis is not fully understood, nicotinic acid (vitamin B3) occurs in some bacteria, fungi, and mammals.Category: pyridine-derivatives