NDLI: Kinetics of the production of chain-end groups and methanol from the depolymerization of cellulose during the ageing of paper/oil systems. Part 1: Standard wood kraft insulation

Please wait, while we are loading the content...

Self-reinforced composites obtained by the partial oxypropylation of cellulose fibers. 2. Effect of catalyst on the mechanical and dynamic mechanical properties

Cellulose/chitosan hybrid nanofibers from electrospinning of their ester derivatives

A search of an optimal carrier for immobilization of chitin deacetylase

Investigation of endoglucanase selectivity on carboxymethyl cellulose by mass spectrometric techniques

The antimicrobial activity of the cotton fabric grafted with an amino-terminated hyperbranched polymer

Accurate determination of the degree of substitution of long chain cellulose esters

Synthesis of cellulose benzoates under homogeneous conditions in an ionic liquid

Rendering cellulose fibers antimicrobial using cationic β-cyclodextrin-based polymers included with antibiotics

Incorporation into paper of cellulose triacetate films containing semiconductor nanoparticles

Kinetics of the production of chain-end groups and methanol from the depolymerization of cellulose during the ageing of paper/oil systems. Part 1: Standard wood kraft insulation

Diffusion rate of polyethylene glycol into cell walls of red pine following vacuum impregnation

Variations in fiber length within a first-thinning Scots pine (Pinus sylvestris) stem

Cellulose : Volume 16, Issue 1, February 2009

Cellulose : Volume 15

Cellulose : Volume 14

Cellulose : Volume 13

Cellulose : Volume 12

Cellulose : Volume 11

Cellulose : Volume 10

Kinetics of the production of chain-end groups and methanol from the depolymerization of cellulose during the ageing of paper/oil systems. Part 1: Standard wood kraft insulation

Content Provider	Springer Nature Link
Author	Gilbert, Roland Jalbert, Jocelyn Tétreault, Pierre Morin, Brigitte Des, Yves
Copyright Year	2008
Abstract	Recently, the existence of a relation between the rupture of 1,4-β-glycosidic bonds in the cellulose during thermal-ageing of paper/oil systems and the detection of methanol in the oil has been reported for the first time in this journal (Jalbert et al. 2007). The present study addresses the rate constants of the reaction for standard wood kraft papers, two immersed in inhibited naphthenic oil under air (paper/oil weight–volume ratio of 1:18) and one in non-inhibited paraffinic oil under nitrogen (paper/oil weight–volume ratio of 1:30). The isotherms in the range of 60–130 °C show that the initial rate of methanol production markedly increases with temperature and to a lesser extent with the moisture of the specimens (initially between 0.5 and 2.25% (w/w)), similarly to what is noted for the depolymerization through the Ekenstam’s pseudo-zero order model. The Arrhenius expression of the rate constants reveals linear relationships that confirm the dominance of a given mechanism in both cases. A very good agreement is also noted for the activation energy over the entirely paper/oil systems studied (106.9 ± 4.3 and 103.5 ± 3.7 kJ mol−1 for methanol and scissions, respectively). Furthermore, a comparison of the rate constants $$ \left( {k_{{{\text{CH}}_{ 3} {\text{OH}}}} /k_{\text{scissions}} } \right) $$ shows approximately constant values indicating an apparent yield for the methanol of about one-third molecule per every scission for the tests under air (0.27 ± 0.04 for Clupak HD75 and 0.37 ± 0.14 for Munksjö TH70) and even lower for the ones under N2 (0.12 ± 0.03 for Munksjö E.G.). As expected from a pseudo-zero order model, these values were shown to be consistent with a similar comparison of the amount of CH3OH and chain-end groups produced under specific time–temperature ageing conditions (168 h at 120 °C). Finally, an additional test carried out with unaged cellulose in contact with a fresh solution of methanol in oil (cellulose/oil weight–volume ratio of 1:18) shows that at equilibrium, over 58% of the species is lost from the solution due to penetration into the fibres. Such results reveal the importance of the species partitioning in establishing the true correspondence between the molecules of CH3OH produced and the scissions.
Starting Page	327
Ending Page	338
Page Count	12
File Format	PDF
ISSN	09690239
Journal	Cellulose
Volume Number	16
Issue Number	2
e-ISSN	1572882X
Language	English
Publisher	Springer Netherlands
Publisher Date	2008-10-15
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Cellulose degradation 1,4-β-Glycosidic bond scission Methanol Ageing indicator Kinetics Activation energy Frequency factor Insulating paper Moisture content Insulating oil Transformer Remaining life Polymer Sciences Organic Chemistry Physical Chemistry Bioorganic Chemistry
Content Type	Text
Resource Type	Article
Subject	Polymers and Plastics

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Kinetics of the production of chain-end groups and methanol from the depolymerization of cellulose during the ageing of paper/oil systems. Part 2: Thermally-upgraded insulating papers

Identification of a chemical indicator of the rupture of 1,4-β-glycosidic bonds of cellulose in an oil-impregnated insulating paper system

Pulsed KrF excimer laser induced degradation of cellulose based insulating paper

Understanding ethanol versus methanol formation from insulating paper in power transformers

Understanding ethanol versus methanol formation from insulating paper in power transformers

Kinetics of the production of chain-end groups and methanol from the depolymerization of cellulose during the ageing of paper/oil systems. Part 3: extension of the study under temperature conditions over 120 °C

Methanol Marker for the Detection of Insulating Paper Degradation in Transformer Insulating Oil

Copper Release Kinetics and Ageing of Insulation Paper in Oil-Immersed Transformers

Influence of transformer oil acidity on insulating paper degradation

Kinetics of the production of chain-end groups and methanol from the depolymerization of cellulose during the ageing of paper/oil systems. Part 1: Standard wood kraft insulation

Similar Documents

Kinetics of the production of chain-end groups and methanol from the depolymerization of cellulose during the ageing of paper/oil systems. Part 2: Thermally-upgraded insulating papers

Identification of a chemical indicator of the rupture of 1,4-β-glycosidic bonds of cellulose in an oil-impregnated insulating paper system

Pulsed KrF excimer laser induced degradation of cellulose based insulating paper

Understanding ethanol versus methanol formation from insulating paper in power transformers

Understanding ethanol versus methanol formation from insulating paper in power transformers

Kinetics of the production of chain-end groups and methanol from the depolymerization of cellulose during the ageing of paper/oil systems. Part 3: extension of the study under temperature conditions over 120 °C

Methanol Marker for the Detection of Insulating Paper Degradation in Transformer Insulating Oil

Copper Release Kinetics and Ageing of Insulation Paper in Oil-Immersed Transformers

Influence of transformer oil acidity on insulating paper degradation

Kinetics of the production of chain-end groups and methanol from the depolymerization of cellulose during the ageing of paper/oil systems. Part 1: Standard wood kraft insulation