Abstract
Abstract In this study mesoporous SBA-15 was synthesized under acidic conditions using triblock copolymer Pluronic P123 as template and tetraethyl orthosilicate as a silica source. SBA-15 was modified by different iron loading (1.8 %, 5 % and 10 %) via post-synthesis impregnation with Fe(NO3)3·9H2O. The obtained catalysts were characterized using XRD analysis, WDXRF spectroscopy and N2 adsorption-desorption analysis. Pyrolysis of cellulose with and without the catalyst was investigated using TG-FTIR. It was found that the presence of the synthesized catalysts affects formation of solid residue and significantly alters the composition of the other pyrolysis products. All catalysts considerably reduced the fraction of compounds containing hydroxyl group. Fe (10 %)/SBA-15 exhibited the highest deoxygenation ability. SBA-15 showed the highest catalytic selectivity for synthesis of olefins, while Fe (1.8 %)/SBA-15 showed the highest catalytic selectivity for synthesis of aromatic hydrocarbons.
Highlights
Sustainable development is not possible without better use of renewable energy resources including biomass [1]
In order to obtain selective information on the possibilities of catalytic pyrolysis of the main constituents, the present study investigated the pyrolysis of cellulose
Pluronic P123, tetraethyl orthosilicate (TEOS), HCl, ethanol, Fe(NO3)3∙9H2O were purchased from Sigma-Aldrich and used for synthesis of SBA-15 and Fe/SBA-15
Summary
Sustainable development is not possible without better use of renewable energy resources including biomass [1]. Bioresources are increasingly used in the production of high value-added products, in addition, as current trends continue, rapid development of biotechnologies is. Especially the bio-oil, could be important feedstock for chemicals and transportation fuels. Catalytic pyrolysis is a promising way of reducing the oxygen content in bio-oil and improving its properties [6]–[8]. It is known that iron in form of Fe2O3 allows to obtain cheap and active supported SBA-15 catalysts [13], so we synthesized them and studied them in this work. Cellulose pyrolysis predominantly has been studied using microporous zeolites and mesoporous MCM-41 [15]
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