Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Werner Hodek"'
Publikováno v:
Fuel. 77:1099-1105
Asphaltenes generated by a multiple precipitation procedure were found to contain n-alkanes from C14 to C31, which show an odd over even preference. This result further indicates that alkyl chains or alkylene bridges appear mostly as substituents in
Autor:
Werner Hodek
Publikováno v:
Fuel Processing Technology. 40:369-378
Coal is a heterogeneous organic substance which is not meltable without decomposition and almost totally insoluble in common organic solvents. It does not readily react chemically under mild conditions and therefore is very resistant to microbiologic
Autor:
Werner Hodek, K.H. van Heek
Publikováno v:
Fuel. 73:886-896
The paper shows the possibilities and limitations of experimental and theoretical methods of non-isothermal reaction kinetics applied to the investigation of the interaction of coal structure and pyrolysis behaviour, including the interpretation and
Publikováno v:
Fuel. 70:424-428
In coal pyrolysis O-containing structures such as ether bridges and phenolic groups play an important role. Their reactions were studied by non-isothermal pyrolysis of a high volatile bituminous coal and some model polymers with gas Chromatographic d
Publikováno v:
Fuel. 69:305-310
A bituminous coal vitrinite (82.3%C, daf) was treated with NaH in decalin under 3 MPa hydrogen pressure at 300 °C for 6 h. The reacted vitrinite was fractionated according to its solubility in decalin, methanol, tetrahydrofuran and pyridine. The THF
This chapter reviews pyrolysis reactions by the comparison of coal macerals and model polymers. The pyrolysis experiments described in the chapter were performed in a thermobalance. 0.1 to 0.5 g of the sample was heated from 250°C to 900°C with a h
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b1cec6c4fc2a2c27522181b5e873778c
https://doi.org/10.1016/b978-0-7506-0387-4.50125-x
https://doi.org/10.1016/b978-0-7506-0387-4.50125-x
Rye straw was completely hydroliquefied, using red mud or CoOMoO 3 as the catalyst. Red mud catalyst exhibited a satisfactory activity only in the presence of sulphur at ≈ 673 K. Depending on reaction conditions, different amounts of gaseous and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4c94a0ae2072f9b855949156910185e9
Publikováno v:
Fuel. 63:756-761
Cracking of tetralin and t-decalin has been investigated in the temperature range between 700 and 850 °C and with residence times between 0.08 and 0.4 s. Most of the tetralin is dehydrogenated to yield 1,2-dihydronaphthalene and naphthalene. Other m
Steam cracking of coal-derived oils and model compounds2. Cracking of hydrogenated coal-derived oils
Publikováno v:
Fuel. 63:762-766
Coal-derived oils of different degrees of hydrogenation and of different boiling ranges as well as a petrol-based gas oil (for comparison) have been thermally cracked at 830 °C with a residence time of 0.14s. Hydrogenated coal-derived middle oil yie
Autor:
Georg Kölling, Werner Hodek
Publikováno v:
Fuel. 52:220-225
Four bituminous coals of different rank were acylated with aliphatic acyl chlorides using Friedel-Crafts catalysts. A dry steam coal and a coking coal showed particularly good reactivity, five acyl groups being inserted per 100 carbon atoms. Compared