title: Efficient desulfurization by polymer-inorganic nanocomposite membranes fabricated in reverse microemulsion.
abstract: The sulfur in gasoline will convert to SO(2) after combustion under high temperature, which adversely affects human health and the environment. Membrane technique in particular pervaporation offers a number of potential advantages over conventional FCC gasoline desulfurization processes. The present study focuses on the performance enhancement of PDMS membrane by incorporating silica nanoparticles. Specifically, silica nanoparticles formed by the catalysis and templating of protamine in w/o reverse microemulsion are in situ embedded into PDMS bulk matrix, endowing the resultant oleophilic nanocomposite membranes with appropriate free volume properties and superior separation performance. Through the rational manipulation of biomimetic mineralization at water-oil interface, silica particles with uniform size are acquired. Following this protocol, by introducing organic PDMS oligomers into the oil phase, PDMS-SiO(2) nanocomposite membranes are prepared in a facile way. The resultant nanocomposite membranes display superior permeability and permselectivity in the pervaporative desulfurization using thiophene/n-octane binary mixture as model gasoline, for example, under the condition of 500 ppm sulfur in feed (40 L/h) at 30°C, an enrichment factor of 4.83-5.82 with a normalized permeation rate of 6.61-10.76 × 10(-5)kgm/m(2)h is acquired.
authors: Key Laboratory for Green Chemical Technology, Ministry of Education of China, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China.
authors: Ben
authors: B
authors: Li
authors: Shengnan
authors: S
authors: Yu
authors: Zhongyi
authors: Z
authors: Jiang
authors: Wanpeng
authors: W
authors: Liu
authors: Ruijian
authors: R
authors: Cao
authors: Hong
authors: H
authors: Wu
mesh_terms: D000397:Air Pollution / Q000517:prevention & control; D004129:Dimethylpolysiloxanes / Q000737:chemistry*; D004655:Emulsions; D005742:Gasoline; D008567:Membranes, Artificial; D053761:Nanocomposites / Q000737:chemistry*; D009795:Octanes / Q000737:chemistry; D012822:Silicon Dioxide / Q000737:chemistry*; D013455:Sulfur / Q000737:chemistry*; D013876:Thiophenes / Q000737:chemistry
chemical_list: D004129:Dimethylpolysiloxanes; D004655:Emulsions; D005742:Gasoline; D008567:Membranes, Artificial; D009795:Octanes; D013876:Thiophenes; C013830:baysilon; D013455:Sulfur; D012822:Silicon Dioxide; C026728:octane