Chemical characterization and water content determination of bio-oils obtained from various biomass species using31P NMR spectroscopy

Autor:	John D. Muzzy, Kristiina Iisa, Arthur J. Ragauskas, Calvin Feik, Kasi David, Haoxi Ben
Rok vydání:	2012
Předmět:	chemistry.chemical_compound Biodiesel chemistry Renewable Energy Sustainability and the Environment Bioenergy Biofuel Biomass Lignin Organic chemistry Waste Management and Disposal Water content Pyrolysis Karl Fischer titration
Zdroj:	Biofuels. 3:123-128
ISSN:	1759-7277 1759-7269
Popis:	Background: Pyrolysis is a promising approach to utilize biomass for biofuels. One of the key challenges for this conversion is how to analyze complicated components in the pyrolysis oils. Water contents of pyrolysis oils are normally analyzed by Karl Fischer titration. The use of 2-chloro-4,4,5,5,-tetramethyl-1,3,2-dioxaphospholane followed by 31P NMR analysis has been used to quantitatively analyze the structure of hydroxyl groups in lignin and whole biomass. Results:31P NMR analysis of pyrolysis oils is a novel technique to simultaneously characterize components and analyze water contents in pyrolysis oils produced from various biomasses. The water contents of various pyrolysis oils range from 16 to 40 wt%. The pyrolysis oils obtained from Loblolly pine had higher guaiacyl content, while that from oak had a higher syringyl content. Conclusion: The comparison with Karl Fischer titration shows that 31P NMR could also reliably be used to measure the water content of pyrolysis oils. Simultaneously with ana...
Databáze:	OpenAIRE
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