Abstract
Sulfur removal from a high-sulfur Turkish lignite (Gediz) using aqueous sodium hydroxide solutions having dissolved oxygen was investigated under mild oxidative conditions. Effects of the parameters such as sodium hydroxide / lignite weight ratio, temperature, and partial pressure of oxygen were investigated within the ranges of 0.05-0.8, 423-498 K, and 1-2 MPa, respectively. Optimum values of these parameters were determined regarding sulfur removal and coal recovery. Influences of dry oxidation of the lignite sample as a pretreatment at 573 K and subsequent washing of some treated lignite samples with 1 N HCl were investigated.
Original language | English |
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Pages (from-to) | 829-837 |
Number of pages | 9 |
Journal | Energy Sources |
Volume | 21 |
Issue number | 9 |
DOIs | |
Publication status | Published - 1999 |
Keywords
- Desulfurization
- Lignite
- Sodium hydroxide