Different solid acid catalysts influence on properties and chemical composition change of upgrading bio-oil
✍ Scribed by Min Song; Zhaoping Zhong; Jiajia Dai
- Publisher
- Elsevier Science
- Year
- 2010
- Tongue
- English
- Weight
- 249 KB
- Volume
- 89
- Category
- Article
- ISSN
- 0165-2370
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✦ Synopsis
Several solid acid catalysts are prepared and compared in upgrading bio-oil using ethanol and acetic acid as raw materials through the catalytic esterification reaction model. The SO 4 2-/SiO 2 -TiO 2 catalyst in the optimum experimental conditions achieved higher catalytic activity. The bio-oil was stabilized by ester reaction over SO 4 2-/SiO 2 -TiO 2 catalyst in the conditioned experiment with lowered dynamic viscosity and enhanced fluidity, which was sustained after aging for 6 months in a refrigerator under about 5 • C. The gas chromatography-mass spectrometry analysis of the composition before and after the catalytic esterification proved that the proportion of esters in the upgraded bio-oils increased remarkably, suggesting that the catalytic esterification can vary the composition and properties obviously thus enhances the stability of bio-oil.