Abstract
| Original language | English |
|---|---|
| Title of host publication | Fast Pyrolysis of Biomass |
| Subtitle of host publication | Advances in Science and Technology |
| Publisher | Royal Society of Chemistry RSC |
| Chapter | 8 |
| Pages | 138-159 |
| ISBN (Print) | 978-1-78262-618-3, 978-1-78801-024-5, 978-1-78801-186-0 |
| DOIs | |
| Publication status | Published - 2017 |
| MoE publication type | D2 Article in professional manuals or guides or professional information systems or text book material |
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Bio-oil stabilization. / Oasmaa, Anja.
Fast Pyrolysis of Biomass: Advances in Science and Technology. Royal Society of Chemistry RSC, 2017. p. 138-159.Research output: Chapter in Book/Report/Conference proceeding › Chapter or book article › Professional
TY - CHAP
T1 - Bio-oil stabilization
AU - Oasmaa, Anja
N1 - CA2: BA3608 SE: In: Fast Pyrolysis of Biomass: Advances in Science and Technology AU2: Oasmaa, Anja
PY - 2017
Y1 - 2017
N2 - Stability of fast pyrolysis bio-oils is a complex phenomenon, especially as numerous compounds with different reactivities are involved. Acid-catalysed condensation and polymerization reactions of carbonyl compounds and reactive lignin-derived radical species take place which increase the share of water-insoluble compounds, average molecular weight and viscosity of bio-oil. Aging can be slowed by dilution, removing of alkali metals catalysing the aging reactions, removing hemicelluloses causing acidic environment, or adding antioxidants to stabilize reactive specimens. In some cases, controlled aging can be used to stabilize bio-oil. Enhanced stabilization can be achieved by esterification and acetalization of carboxylic acids and carbonyls, respectively. Stage-fractionation of bio-oil and separate stabilization of these fractions is one alternative approach. In low temperature catalytic hydrodeoxygenation reactive carbonyl compounds are stabilized by hydrogen. All these stabilization methods have advantages and disadvantages. The appropriate stabilization method will depend on the bio-oil application. When hydrocarbon fuels are the desired product, more expensive hydrotreatment (HDO) routes to stabilization might be justified. When targeted as feedstock for an oil refinery, thermal stability is a key factor. Viscosity increase would be an indicative factor on polymerization tendency of the oil but also oxygen content, distillability, and micro carbon residue.
AB - Stability of fast pyrolysis bio-oils is a complex phenomenon, especially as numerous compounds with different reactivities are involved. Acid-catalysed condensation and polymerization reactions of carbonyl compounds and reactive lignin-derived radical species take place which increase the share of water-insoluble compounds, average molecular weight and viscosity of bio-oil. Aging can be slowed by dilution, removing of alkali metals catalysing the aging reactions, removing hemicelluloses causing acidic environment, or adding antioxidants to stabilize reactive specimens. In some cases, controlled aging can be used to stabilize bio-oil. Enhanced stabilization can be achieved by esterification and acetalization of carboxylic acids and carbonyls, respectively. Stage-fractionation of bio-oil and separate stabilization of these fractions is one alternative approach. In low temperature catalytic hydrodeoxygenation reactive carbonyl compounds are stabilized by hydrogen. All these stabilization methods have advantages and disadvantages. The appropriate stabilization method will depend on the bio-oil application. When hydrocarbon fuels are the desired product, more expensive hydrotreatment (HDO) routes to stabilization might be justified. When targeted as feedstock for an oil refinery, thermal stability is a key factor. Viscosity increase would be an indicative factor on polymerization tendency of the oil but also oxygen content, distillability, and micro carbon residue.
U2 - 10.1039/9781788010245-00138
DO - 10.1039/9781788010245-00138
M3 - Chapter or book article
SN - 978-1-78262-618-3
SN - 978-1-78801-024-5
SN - 978-1-78801-186-0
SP - 138
EP - 159
BT - Fast Pyrolysis of Biomass
PB - Royal Society of Chemistry RSC
ER -