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Can I read Oxidative Ammonolysis of Technical Lignins. Part 1. Kinetics of the Reaction under Isothermal Condition at 130°C on EtoBox?
Oxidative Ammonolysis of Technical Lignins. Part 1. Kinetics of the Reaction under Isothermal Condition at 130°C by Ewellyn A. Capanema; Mikhail Yu. Balakshin; Chen-Loung Chen; Josef S. Gratzl; Adrianna G. Kirkman is a Engineering article available to read on EtoBox.
What is Oxidative Ammonolysis of Technical Lignins. Part 1. Kinetics of the Reaction under Isothermal Condition at 130°C about?
## Summary Investigations were conducted on the oxidative ammonolysis of REPAP organosolv lignin at 130 °C in 0.8M NH~4~OH solution under oxygen pressure of 12 bar. The lignin was completely solubilized at the reaction time of 165 min. The kinetics of the nitrogen incorporation consists of two phases. The first phase is up to the reaction time of approximately 35 min including 15 min heating up period. The rate of nitrogen incorporation in the first phase is 2.3 times higher than that in the second phase: κ~1~ = 4.58 × 10^−4^ s^−1^ __versus__ κ~2~ = 1.90 × 10^−4^ s^−1^. The oxygen uptake and CO~2~ formation in the reaction is rather high. When the nitrogen incorporation was ceased after reaction for 255 minutes, more than 4 moles of oxygen/C~9~-unit of lignin were consumed and approximately 1.5 moles of carbon dioxide/C~9~-unit of lignin were released. In addition, extensive __O__-demethylation of methoxyl groups occurred. The molar ratio of the nitrogen incorporation to the methoxyl group eliminated is approximately 1.4 and 0.7 for the soluble and insoluble __N__-modified lignins, respectively. Structural analyses of the soluble __N__-modified lignins by FTIR and ^1^H NMR spectros
Who reads Oxidative Ammonolysis of Technical Lignins. Part 1. Kinetics of the Reaction under Isothermal Condition at 130°C?
It is typically read by researchers, students, and practitioners in Engineering.
- Author
- Ewellyn A. Capanema; Mikhail Yu. Balakshin; Chen-Loung Chen; Josef S. Gratzl; Adrianna G. Kirkman
- Publisher
- Walter de Gruyter GmbH
- Published
- 2001
- Language
- EN
- Field
- Engineering (Physical Sciences)