Influence of hydrocracking and ionic liquid pretreatments on composition and properties of arbidopsis thaliana wild type and CAD mutant lignins

Title
Influence of hydrocracking and ionic liquid pretreatments on composition and properties of arbidopsis thaliana wild type and CAD mutant lignins
Authors
김광호Nicolas JacquetAymerick EudesTanmoy DuttaFlorent BouxinVeronica BenitesEdward BaidooSeema SinghBlake SimmonsDominique LoqueAurore Richel
Keywords
Lignin; hydrocracking; Arabidopsis thaliana; ionic liquid
Issue Date
2020-06
Publisher
Renewable energy
Citation
VOL 152-1249
Abstract
Lignin is the primary contributor to the high cost of biofuel-production from lignocellulosic biomass. In order to study lignin removal and the release of aromatic monomers, we applied hydrocracking and ionic liquid pretreatments on Arabidopsis thaliana biomass from both wild type (WT) and a mutant (CAD cxd) defective in two cinnamyl alcohol dehydrogenase genes involved in the lignin biosynthetic pathway. For Arabidopsis WT, our results highlight that pretreatments reduce average molecular weight of lignin by about 65% and decrease the content of β-O-4 linkages between lignin monomers. For Arabidopsis CAD mutant, an opposite effect is evidenced. Fewer differences were observed on depolymerization and molecular structure of lignin, which indicates that (8-O-4), (8-5), and (8-8) linkages observed in CAD mutant make lignin more resilient to pretreatment than wild-type lignin. Finally, our study shows the potential of hydrocracking pretreatment technology for extracting valuable aldehyde monomers such as vanillin and syringaldehyde from biomass.
URI
http://pubs.kist.re.kr/handle/201004/70975
ISSN
0960-1481
Appears in Collections:
KIST Publication > Article
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