✦ LIBER ✦

Carbon distributions of bituminous coals studied by dipolar dephasing n.m.r. and FT-i.r.

✍ Scribed by Osamu Ito; Seiji Akiho; Tsunenori Nozawa; Masahiro Hatano; Masashi Iino

Publisher: Elsevier Science
Year: 1989
Tongue: English
Weight: 696 KB
Volume: 68
Category: Article
ISSN: 0016-2361
DOI: 10.1016/0016-2361(89)90098-7

No coin nor oath required. For personal study only.

📜 SIMILAR VOLUMES

Characterization of coals and their mace

Characterization of coals and their macerals by solid state 13C n.m.r. and FT-i.r.

✍ D. Cagniant; R. Gruber; C. Lacordaire; A.P. Legrand; D. Sderi; H. Sfihi; P. Toug 📂 Article 📅 1991 🏛 Elsevier Science 🌐 English ⚖ 688 KB

Three Polish coal samples (flame coal, gas coal and orthocoking coal) and their macerals were studied in the solid state by means of 13C cross polarization/magic angle spinning n.m.r. and FT-i.r. spectroscopies. Several structural parameters derived from these analyses allow the characterization of

Distribution of aliphatic and aromatic c

Distribution of aliphatic and aromatic carbons in H-Coal liquids by quantitative 13C FT-n.m.r. spectroscopy

✍ Joseph T. Joseph; John L. Wong 📂 Article 📅 1980 🏛 Elsevier Science 🌐 English ⚖ 578 KB

Three H-Coal liquids, ASO, ASB, and VSO, have been characterized by quantitative FT-n.m.r. spectroscopy. FT-parameters were chosen to allow determination of aromatic:aliphatic carbon ratios to within 1% and 2% error of the theoretical and the absolute number of aromatic and aliphatic carbons in a si

Structural changes of highly volatile bi

Structural changes of highly volatile bituminous coal after catalytic hydrogenation at 350 °C, as revealed by 13C CP/MAS n.m.r. and FT-i.r.

✍ Piotr Tekely; Robert Bacaud; Henri Charcosset; Jean-Jacques Delpuech; Jacky Kist 📂 Article 📅 1988 🏛 Elsevier Science 🌐 English ⚖ 654 KB

Determination of aromatic and aliphatic

Determination of aromatic and aliphatic CH groups in coal by FT-i.r.: 1. Studies of coal extracts

✍ M. Sobkowiak; E. Reisser; P. Given; P. Painter 📂 Article 📅 1984 🏛 Elsevier Science 🌐 English ⚖ 980 KB

Determination of the apparent ratio of q

Determination of the apparent ratio of quaternary to tertiary aromatic carbon atoms in an anthracite coal by 13C-1H dipolar dephasing n.m.r.

✍ P.DuBois Murphy; T.J. Cassady; B.C. Gerstein 📂 Article 📅 1982 🏛 Elsevier Science 🌐 English ⚖ 983 KB

13G1 H heteronuclear dipolar dephasing n.m.r. techniques allow discrimination between different chemical species contributing to the 13C n.m.r. spectra of complex hydrocarbons. Model compound studies show significantly different effective transverse relaxation constants for carboxyl and quaternary c

Characterization of coal liquids by 13C

Characterization of coal liquids by 13C n.m.r. and FT-i.r. spectroscopy — fractions of oils of SRC-I and asphaltenes and preasphaltenes of SRC-I and SRC-II

✍ Kalkunte S. Seshadri; Donald C. Young; Donald C. Cronauer 📂 Article 📅 1985 🏛 Elsevier Science 🌐 English ⚖ 764 KB