期刊
FUEL PROCESSING TECHNOLOGY
卷 190, 期 -, 页码 21-28出版社
ELSEVIER
DOI: 10.1016/j.fuproc.2019.03.011
关键词
Glycerol APR; Glycerol valorization; In situ FFA hydrogenation; Coupled reactions; Pt-Ni/Al2O3
资金
- BIO-OIL S.A. [CTQ 2013-47853R]
Glycerol valorization by coupling APR to yield hydrogen with hydrogenation of a model compound as tandem reactions is approached using Pt-Ni/Al2O3 as efficient catalyst. Oleic acid is used as a C-18 fatty acid model compound for in situ hydrogenation reaction. The combination of the two catalytic transformations to a single tandem process appears particularly interesting since this protocol reduces the number of synthetic steps towards the target compound and avoids external hydrogen supply. Glycerol reforming is carried out in a catalytic fixed bed batch reactor under subcritical water condition between 175 and 275 degrees C (2-6.21 MPa as autogenous pressure). The coupled reactions were carried out using 1 wt % of catalyst, adding oleic acid to the mixture of water/glycerol and without any external hydrogen supply. In APR, maximum glycerol conversion of 80.3% was achieved using Pt-Ni/Al2O3 catalyst at 200 degrees C with H-2-selectivity close to 80% and CO formation below to 3.7%. In the coupled reactions, no hydrogen is observed in the gas-off, which is associated to the hydrogen consumption by oleic acid at 275 degrees C; reaching a hydrogenation conversion value close to 91.3% and deoxygenation conversion of 32% giving a C-17 paraffinic like-hydrocarbon.
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