- Title
- Mechanism of synergy effect during microwave co-pyrolysis of biomass and lignite
- Creator
- An, Yang; Tahmasebi, Arash; Yu, Jianglong
- Relation
- Journal of Analytical and Applied Pyrolysis Vol. 128, Issue November, p. 75-82
- Publisher Link
- http://dx.doi.org/10.1016/j.jaap.2017.10.023
- Publisher
- Elsevier
- Resource Type
- journal article
- Date
- 2017
- Description
- This study reports the synergy effect during co-pyrolysis of Hailar lignite (HL) and palm kernel shell (PKS) biomass under microwave irradiation in the temperature range of 400–600 °C. The results showed that the synergy effect promoted the yields of tar and gas during co-pyrolysis experiments. Gas chromatography-mass spectrometry (GC–MS) analysis of tar showed that the formation of aliphatic hydrocarbons was promoted during co-pyrolysis of lignite and PKS biomass in expense of single-ring aromatic compounds, aliphatic carboxylic acids, alcohols, aldehydes, and ketones. The synergy effect also promoted the formation of H₂ and CO during co-pyrolysis. A two-stage pyrolysis reactor was used in order to investigate the mechanism of synergy during co-pyrolysis by isolating the secondary pyrolysis reactions. The two-stage pyrolysis results showed that secondary pyrolysis reactions were mainly responsible for synergy effect, resulting in higher gas and lower tar yields as a result of secondary tar cracking. HL and PKS chars promoted the formation of aliphatic hydrocarbons, CO, and CH₄ as a result of decarbonylation, decarboxylation, and demethylation reactions. Reforming of methane over HL and PKS chars led to an increase in concentrations of H₂ and CO during secondary pyrolysis reactions.
- Subject
- microwave pyrolysis; synergy effect; coal and biomass co-pyrolysis; secondary pyrolysis reactions
- Identifier
- http://hdl.handle.net/1959.13/1393923
- Identifier
- uon:33628
- Identifier
- ISSN:0165-2370
- Language
- eng
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