Abstract
As a highly abundant renewable carbon source, lignin can be converted to a variety of advanced carbon materials with tailorable properties through slow pyrolysis. In this study, slow pyrolysis of kraft lignin, for the first time, was investigated with a commercial pyrolysis−gas chromatography−mass spectrometry (Py−GC−MS) system through evolved gas analysis-MS (EGA-MS) and heart-cutting-GC−MS (HC-GC−MS) analyses. These analyses allow recovery and examination of the multiphased gas products generated from thermal decomposition of lignin during slow pyrolysis at a controlled heating rate over a long time course, thus making it possible to link operation conditions, pyrolysis chemistry, and carbon material properties. The overall product distributions, including volatiles and solid products, were quantitatively tracked at different heating rates (2, 20, and 40 °C/min) and different temperature regions (100−200, 200−300, and 300−600 °C). Solid residues were further characterized using a suite of analytical tools, in correlation with the investigation of formation mechanisms of volatiles to reveal the reaction chemistry of lignin during slow pyrolysis and to determine the morphology, pore structure, and interfacial chemical properties. This study provides critical insights into the slow pyrolysis chemistry of lignin and the properties of the resulting carbon material. These results will facilitate a better design and control of the lignin slow pyrolysis process for synthesizing functional carbon materials.
Original language | English |
---|---|
Pages (from-to) | 15843-15854 |
Number of pages | 12 |
Journal | ACS Sustainable Chemistry and Engineering |
Volume | 8 |
Issue number | 42 |
DOIs | |
State | Published - Oct 26 2020 |
Bibliographical note
Publisher Copyright:© 2020 American Chemical Society
Keywords
- Analytical pyrolysis
- Carbon materials
- Electrochemical storage
- Lignin
- Morphology
ASJC Scopus subject areas
- General Chemistry
- Environmental Chemistry
- General Chemical Engineering
- Renewable Energy, Sustainability and the Environment