scholarly journals Dependence of reaction kinetics on molecular weight in hydrodenitrogenation of shale oil.

1995 ◽  
Vol 28 (1) ◽  
pp. 122-124
Author(s):  
Soon-Yong Jeong ◽  
James W. Bunger ◽  
Jeong-Kwon Suh ◽  
Jung-Min Lee
Keyword(s):  
Molecular Weight ◽  
Reaction Kinetics ◽  
Shale Oil

Radical transfer system in the enzymatic dehydrogenative polymerization (DHP formation) of coniferyl alcohol (CA) and three dilignols

Holzforschung ◽  
2019 ◽  
Vol 73 (2) ◽  
pp. 189-195 ◽  
Author(s):  
Yasuyuki Matsushita ◽  
Masaya Okayama ◽  
Dan Aoki ◽  
Sachie Yagami ◽  
Kazuhiko Fukushima
Keyword(s):  
Molecular Weight ◽  
Reaction Kinetics ◽  
Consumption Rate ◽  
Coniferyl Alcohol ◽  
Clear Picture ◽  
Transfer System ◽  
Radical Transfer ◽  
Dehydrodiconiferyl Alcohol ◽  
Dehydrogenative Polymerization

Abstract No clear picture has yet been elaborated concerning the mechanism of lignin growth, and thus this topic is the focus of the present paper. Namely, the enzymatic dehydrogenative polymerization (DHP formation) of coniferyl alcohol (CA, as a monolignol) and three dilignols and their reaction kinetics were investigated. The dilignols [guaiacylglycerol-β-coniferyl ether (IβO4), dehydrodiconiferyl alcohol (IIβ5), and pinoresinol (IIIββ)] and CA as a monolignol [(3-OCD3)-coniferyl alcohol (CAOCD3)] were synthesized and subjected to enzymatic DHP formation. The dilignol derived from CAOCD3 could be identified by its higher molecular weight in comparison with the starting dilignols (IβO4, IIβ5, and IIIββ). Based on the observed consumption rate of the CA and its dilignols, it was proposed that a radical transfer system exists between the dilignols, which is generated from the CA and the starting substrates.

Effect of Molecular Size on Intrinsic Reaction Kinetics in Catalytic Hydroprocessing of Shale Oil

1994 ◽  
Vol 8 (5) ◽  
pp. 1143-1148 ◽  
Author(s):  
Soon-Yong Jeong ◽  
James W. Bunger ◽  
C. P. Russell
Keyword(s):  
Reaction Kinetics ◽  
Molecular Size ◽  
Shale Oil

The influence of molecular weight and chemical structure of soft segment in reaction kinetics with tolyl isocyanate

2001 ◽  
Vol 37 (8) ◽  
pp. 1685-1693 ◽  
Author(s):  
A Eceiza ◽  
K de la Caba ◽  
V Gascón ◽  
M.A Corcuera ◽  
I Mondragon
Keyword(s):  
Molecular Weight ◽  
Reaction Kinetics ◽  
Chemical Structure ◽  
Soft Segment
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