Fast Pyrolysis of Four Lignins from Different Isolation Processes Using Py-GC/MS

Energies

Xiaona Lin¹  Shujuan Sui¹  Shun Tan¹  Charles U. Pittman²  Jianping Sun¹  Zhijun Zhang¹ 

[1] MOE Key Laboratory of Bio-based Material Science and Technology, Northeast Forestry University, Harbin 150040, Heilongjiang, China; E-Mails:;Department of Chemistry, Mississippi State University, Mississippi State, MS 39762, USA; E-Mail:

关键词: lignin;    fast pyrolysis;    phenolic compounds;    Py-GC/MS;   

DOI  :  10.3390/en8065107

来源: mdpi

【 摘 要 】

Pyrolysis is a promising approach that is being investigated to convert lignin into higher value products including biofuels and phenolic chemicals. In this study, fast pyrolysis of four types of lignin, including milled Amur linden wood lignin (MWL), enzymatic hydrolysis corn stover lignin (EHL), wheat straw alkali lignin (AL) and wheat straw sulfonate lignin (SL), were performed using pyrolysis gas-chromatography/mass spectrometry (Py-GC/MS). Thermogravimetric analysis (TGA) showed that the four lignins exhibited widely different thermolysis behaviors. The four lignins had similar functional groups according to the FTIR analysis. Syringyl, guaiacyl and p-hydroxyphenylpropane structural units were broken down during pyrolysis. Fast pyrolysis product distributions from the four lignins depended strongly on the lignin origin and isolation process. Phenols were the most abundant pyrolysis products from MWL, EHL and AL. However, SL produced a large number of furan compounds and sulfur compounds originating from kraft pulping. The effects of pyrolysis temperature and time on the product distributions from corn stover EHL were also studied. At 350 °C, EHL pyrolysis mainly produced acids and alcohols, while phenols became the main products at higher temperature. No obvious influence of pyrolysis time was observed on EHL pyrolysis product distributions.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.