Synthesis,optimization and characterization of biochar based catalyst from sawdust for simultaneous esterification and transesterification

作     者：Suchith Chellappan Vaishakh Nair Sajith V. Aparna K. 

作者机构：Department of Chemical Engineering National Institute of TechnologyCalicut India Institute of Physical Chemistry Polish Academy of Sciences School of Nano Science and Technology National Institute of Technology 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2018年第26卷第12期

页      面：2654-2663页

核心收录：

学科分类：0710[理学-生物学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 0817[工学-化学工程与技术] 08[工学] 0703[理学-化学] 

基　　金：Supported by TEQIP-II sanctioned under NITC/TEQIP-II/R&D/2015-16 National Institute of Technology Calicut 

主　　题：Biochar Biochar based catalyst Pyrolysis Biomass Sulfonation 

摘      要：The development of a benign environmental catalyst for the generation of biodiesel is an area of importance to reduce the overall usage of fossil fuels. In the current work, biochar was produced by slow pyrolysis of Irul wood sawdust. The optimization for biochar generation was carried out for different reaction temperatures and heating durations. The biochar was used to prepare solid acid catalysts by sulfonation process. The characterization of biochar and the sulfonated catalyst were carried out using Elemental analysis, Fourier Transform Infrared spectroscopy(FTIR), Powder X-ray Diffraction(XRD), Thermo Gravimetric Analysis(TGA), Scanning Electron Microscopy(SEM) and Surface area analyzer(BET). The characterization results showed that sulfonation of biochar resulted in biochar based solid acid catalyst containing various functional acidic groups like weak acidic\\OH groups, strong acidic\\COOH and SO3 H groups. The total acid density and sulfonic acid group density of catalyst were estimated and showed excellent acidic sites concentration which gives a good catalytic activity for biodiesel production through simultaneous esterification and transesterification. The enhanced catalytic activity is due to the high acid density of SO3 H groups and the reactant accessibility towards acidic sites as well as the strong affinity between the hydrophilic reactants and the neutral OH groups which are bonded with the polycyclic aromatic carbon rings. The performance of biochar catalyst for the production of biodiesel was evaluated by comparing the yield obtained. The FTIR and Gas Chromatography–Mass Spectroscopy(GC–MS) were also carried out for the analysis of biodiesel produced.