Chapter 8: Pyrolysis Mechanisms of Lignin Model Compounds Using a Heated Micro-Reactor

Robichaud, David J.; Nimlos, Mark R.; Ellison, G. Barney

doi:10.1007/978-981-287-769-7_8

Title: Chapter 8: Pyrolysis Mechanisms of Lignin Model Compounds Using a Heated Micro-Reactor

Book · Sat Oct 03 00:00:00 EDT 2015

DOI:https://doi.org/10.1007/978-981-287-769-7_8· OSTI ID:1262197

Robichaud, David J.; Nimlos, Mark R.; Ellison, G. Barney

Lignin is an important component of biomass, and the decomposition of its thermal deconstruction products is important in pyrolysis and gasification. In this chapter, we investigate the unimolecular pyrolysis chemistry through the use of singly and doubly substituted benzene molecules that are model compounds representative of lignin and its primary pyrolysis products. These model compounds are decomposed in a heated micro-reactor, and the products, including radicals and unstable intermediates, are measured using photoionization mass spectrometry and matrix isolation infrared spectroscopy. We show that the unimolecular chemistry can yield insight into the initial decomposition of these species. At pyrolysis and gasification severities, singly substituted benzenes typically undergo bond scission and elimination reactions to form radicals. Some require radical-driven chain reactions. For doubly substituted benzenes, proximity effects of the substituents can change the reaction pathways.

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Research Organization:: National Renewable Energy Laboratory (NREL), Golden, CO (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Sustainable Transportation Office. Bioenergy Technologies Office (BETO)

DOE Contract Number:: AC36-08GO28308

OSTI ID:: 1262197

Report Number(s):: NREL/CH-5100-64481

Country of Publication:: United States

Language:: English

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09 BIOMASS FUELS
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lignin
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Title: Chapter 8: Pyrolysis Mechanisms of Lignin Model Compounds Using a Heated Micro-Reactor

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