Catalytic dehydrogenation of coal. Part 6.
Catalytic dehydrogenation of coal: Part 5. Effect of air oxidation on catalytic dehydrogenation of coal
β Scribed by L. Reggel; I. Wender; R. Raymond
- Publisher
- Elsevier Science
- Year
- 1970
- Tongue
- English
- Weight
- 131 KB
- Volume
- 49
- Category
- Article
- ISSN
- 0016-2361
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β¦ Synopsis
Dehydrogenation
of a Pittsburgh seam coking vitrinite is relltiveiy insensitive to mild oxidation, but the yield of hydrogen is considerably reduced after oxidation at 150Β°C for 66 h.
π SIMILAR VOLUMES
When vitrinite is catalytically dehydrogenated in the presence of phenanthridine as vehicle, the yield of hydrogen is not greatly influenced by the catalyst support or the concentration of metal on the support. The metal used has a large effect, palladium giving the highest yield of hydrogen. \* Th
Four macerals from an hvab coal have been dehydrogenated. As expected, different yields of hydrogen were obtained. Vitrinite and exinite, which evolve 25 and 31 atoms of hydrogen per 100 carbon atoms, respectively, are evidently rich in hydroaromatic structures. Fusinite, which yields only 5 atoms o
## JapaneseTaiheiyocoal (75.9%C) wasoxidizedwithairat250"Cfor3-40handat300"Cfor3-10 h.The weightdecreasedfrom 16.3 to46.5%at 250Candfrom21.7 to41.3%at300"C. Carbon lossandyieldof NaOH soluble were obtained. The resultant oxidation products were hydrogenated at 370Β°C for 1 h under 10 MPa hydrogen p
The use of dispersed sulphided molybdenum and hydrous titanium oxide (HTO) catalysts enable tar yields in excess of 60% daf coal to be obtained for bituminous coals in fixed-bed hydropyrolysis using relatively mild conditions. However, it was found that a key difference between hydropyrolysis and ba