04/01729 Use of explosives for coal barrier pillar breach: Ramsey, D.L. Proceedings of the Annual Conference on Explosives and Blasting Technique, 2003, 29, (1), 1–6
- Book ID
- 104279521
- Publisher
- Elsevier Science
- Year
- 2004
- Weight
- 176 KB
- Volume
- 45
- Category
- Article
- ISSN
- 0140-6701
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✦ Synopsis
01 Solid fuels (sources, winning, properties) Contents of preserved lignin structures in Miocene-aged lignite lithotypes were determined. Phenol aldehydes, ketones and acids released from lignin by CuO oxidative hydrolysis were separated by capillary zone electrophoresis (CZE). Products of degradation were separated and identified by GC-MS to confirm CZE data and to complement composition data. The following values for the contents of preserved lignin structures in lignite lithotypes were determined (in wt%): xylain, 8.5; humovitrain, 6.7; liptain, 6.4; and humoclarain, 3.3. Some fatty acids, negligible contents of benzene polycarboxylic acids and their hydroxy/methoxy counterparts were also observed using GC-MS.