Journal article
Hydrothermal Catalytic Deoxygenation of Fatty Acid and Bio-oil with In Situ H2
ACS sustainable chemistry & engineering, Vol.6(4), pp.4521-4530
04/02/2018
Handle:
https://hdl.handle.net/2376/117958
Abstract
Fatty acid and its derivatives have recently received considerable interest as a possible precursor for producing renewable hydrocarbon. Compared to the traditional hydrotreating method that consumes a significant amount of H2, this study developed a hydrothermal catalytic deoxygenation approach that produced hydrocarbon from fatty acids and bio-oil with in situ self-sustaining H2. The presence of H2O played a critical role in the generation of in situ H2 via enhancing water–gas shift and reforming reactions, thus promoting fatty acid decarbonylation and increased paraffin yields. Both saturated and unsaturated fatty acids (stearic acid (SA) and oleic acid (OA)) were employed as model compounds, where 100% conversion was achieved with 63.59% paraffin yield from SA and 47% n-paraffin yield from OA. By investigating the reaction pathway, fatty acid and glycerol reforming, and water–gas shift reactions, were determined to be the major reactions for the in situ H2 generation. Decarbonylation was found as the major route for fatty acid and bio-oil deoxygenation. Fatty acid reforming and hydrogenoloysis reactions were found as the major reactions for producing short-chain hydrocarbons (C8–C16). We previously developed a sequential hydrothermal liquefaction method to produce bio-oil from yeast biomass. In this study, the produced bio-oil was also tested, where 100 wt % bio-oil conversion and 55.17 wt % of liquid n-paraffin yield were achieved at 320 °C. This study demonstrates that this hydrothermal catalytic process is a promising approach for producing liquid paraffin (C8–C15) from fatty acid and bio-oil under the conditions of no H2 supply.
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Details
- Title
- Hydrothermal Catalytic Deoxygenation of Fatty Acid and Bio-oil with In Situ H2
- Creators
- Chao Miao - Department of Biological Systems EngineeringOscar Marin-Flores - Washington State UniversityTao Dong - Department of Biological Systems EngineeringDifeng Gao - Department of Biological Systems EngineeringYong Wang - Washington State UniversityManuel Garcia-Pérez - Department of Biological Systems EngineeringShulin Chen - Department of Biological Systems Engineering
- Publication Details
- ACS sustainable chemistry & engineering, Vol.6(4), pp.4521-4530
- Academic Unit
- Biological Systems Engineering, Department of; Chemical Engineering and Bioengineering, School of
- Publisher
- American Chemical Society
- Identifiers
- 99900583055801842
- Language
- English
- Resource Type
- Journal article