Catalytic methane pyrolysis in molten MnCl2-KCl
Methane decomposition to produce molecular hydrogen and solid carbon was catalyzed by contact with molten KCl:MnCl2 mixtures in a bubble column reactor from 700 to 1050 °C. The apparent activation energy decreased from approximately 300 kJ/mole for pure KCl to 161 kJ/mole in a 67:33 mol % mixture of...
Saved in:
Published in | Applied catalysis. B, Environmental Vol. 254 |
---|---|
Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
United States
Elsevier
07.05.2019
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | Methane decomposition to produce molecular hydrogen and solid carbon was catalyzed by contact with molten KCl:MnCl2 mixtures in a bubble column reactor from 700 to 1050 °C. The apparent activation energy decreased from approximately 300 kJ/mole for pure KCl to 161 kJ/mole in a 67:33 mol % mixture of KCl:MnCl2. At 30% methane conversion, pyrolysis in the KCl:MnCl2 melt at 1050 °C had high hydrogen selectivity (˜99%) in comparison to pure molten KCl (˜90%), which was observed to produce multiple hydrocarbon co-products. The pyrolysis activity of the KCl:MnCl2 melt remained stable for over 30 h and produced a separable, highly graphitic carbon solid that accumulated at the surface of the higher-density salt melt. |
---|---|
Bibliography: | USDOE Office of Science (SC), Basic Energy Sciences (BES) FG03-89ER14048 |
ISSN: | 0926-3373 1873-3883 |