RESUMEN
Aromatic hydrocarbons were produced from lignin, a complex natural amorphous polymer commonly regarded as by-product of the pulping process and from biofuel production. The catalytic decomposition of lignin using supported Pt catalysts was performed to produce small molecule hydrocarbons. Aromatic small-molecule hydrocarbon products were identified and quantified using GC/MS and GC-FID, which demonstrated that 27.6% of aromatic hydrocarbons were obtained from the activated carbon-supported Pt (Pt/AC) catalyst which had the highest Pt surface area.
Asunto(s)
Álcalis/química , Biocombustibles , Hidrocarburos Aromáticos/síntesis química , Lignina/química , Nanopartículas del Metal/química , Platino (Metal)/química , Catálisis , Coloides/química , Conservación de los Recursos Energéticos/métodos , Ensayo de Materiales , Tamaño de la PartículaRESUMEN
Alkali lignin, a byproduct of the pulping process, was depolymerized using Pt nanoparticle catalysts. A depolymerized lignin with a lower molecular weight was obtained and characterized with GPC and NMR. 31P-NMR using OH-sensitive probing molecules showed the formation of guaiacyl OHs during the reaction, indicating the cleavage of guaiacyl ether bonds.
Asunto(s)
Álcalis/química , Lignina/química , Nanopartículas del Metal/química , Platino (Metal)/química , Polímeros/química , Catálisis , Ensayo de Materiales , Nanopartículas del Metal/ultraestructura , Peso Molecular , Tamaño de la Partícula , ViscosidadRESUMEN
A highly conductive, air stable and scalable poly(3,4-ethylenedioxythiophene) (PEDOT): poly(4-styrenesulfonate) (PEDOT:PSS) are prepared by using mass production ultrafiltration. By effectively removing excess PSS and various reaction impurities using repeated 100 nm pore membrane filtration, purified PEDOT:PSS exhibit conductivity as high as 2000 S cm-1 .