|
| << vorige | volgende >> |
Tijdschrift beschrijving
Alle jaargangen van het bijbehorende tijdschrift
Alle afleveringen van het bijbehorende jaargang
Alle artikelen van de bijbehorende aflevering
Details van artikel 15 van 114 gevonden artikelen
| Titel: |
Catalytic Decarboxylation of Elbistan Lignite |
| Auteur: |
Ozvatan, Sumer Yurum, Yuda |
| Verschenen in: |
Energy sources. Part A, Recovery utilization and environmental effects |
| Paginering: | Jaargang 24 (2002) nr. 6 pagina's 581-589 |
| Jaar: |
2002-06-01 |
| Inhoud: |
Decarboxylation of low-rank Turkish Elbistan lignite at low temperatures by utilizing cupric sulphate as a catalyst was investigated. The gross calorific value of the lignite treated with 4 wt% Cu 2+ and decarboxylated at 200°C for 30 min increased about 40%. Fourier transform infrared (FTIR) and solid-state 13 C nuclear magnetic resonance (NMR) methods have been used to investigate the changes in the oxygen functional groups in Elbistan lignite that occurred during decarboxylation. Activation energies of the decarboxylation reactions were calculated as 100.7 kJ/mol and 44.5 kJ/mol for original and treated Elbistan lignite samples, respectively. The sequence in the rate of loss of the oxygen functional groups was as carboxyl, carbonyl, hydroxyl, and carboxylate ions. With the presence of Cu 2+ ions, decarboxylation reactions procedeed with higher rates by a dissociative mechanism to release CO or CO 2 simply by heating. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 15 van 114 gevonden artikelen
| << vorige | volgende >> |