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Maillard chemistry, or the low temperature condensation of amino acids and carbohydrates, is shown to be relevant to the practical regime of biomass pyrolysis and leads to dramatic changes in low-temperature volatile products and residual solid structure. Mixtures of amino acids and glucose were subjected to a two-temperature heating sequence (5 min each at 170 and 325 o C) and the volatile...
The pyrolysis of vanillin (3-methoxy-4-hydroxy-benzaldehyde) was studied to determine the reaction pathways that lead to the formation of aromatics and to establish an empirical kinetic model. Molecular beam mass spectrometry and multivariate data analysis were used to follow the complicated pyrolysis chemistry and to determine quantitative kinetic parameters of aromatic hydrocarbon formation. The...
Cellulose-derived pyrolysis products and selected primary products, 5-hydroxymethyl furfural (5-HMF), levoglucosan and hydroxyacetaldehyde (HAA) were used as starting materials for kinetic studies of gas-phase pyrolysis by using flow tube reactors and product detection with molecular beam mass spectrometry (MBMS). Multivariate data analysis was used to identify major product classes for lumped product...
The gas-phase pyrolysis of stigmasterol was investigated using molecular beam mass spectrometry to study the reaction pathways that lead to the formation of aromatic compounds and to build an empirical kinetic model. We used multivariate data analysis to extract trends in the data and identify major product classes. Based on this analysis, we have developed a lumped kinetic model to describe the formation...
We have investigated the pyrolysis of anisole (C 6 H 5 OCH 3 ), a model compound for methoxy functional groups in lignin. An understanding of the pyrolysis of this simple compound can provide valuable insight into the mechanisms for the thermal decomposition of biomass. Our emphasis in this study is the formation of polynuclear aromatic hydrocarbons (PAHs) and in particular...
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