Coal desulphurization in aqueous hydrogen peroxide

✍ Scribed by E. Ahnonkitpanit; P. Prasassarakich

• Publisher: Elsevier Science
• Year: 1989
• Tongue: English
• Weight: 591 KB
• Volume: 68
• Category: Article
• ISSN: 0016-2361
• DOI: 10.1016/0016-2361(89)90114-2

✦ Synopsis

Coals from Thailand were desulphurized by leaching in a small stirred autoclave with aqueous hydrogen peroxide/sulphuric acid solution. Most of the inorganic sulphur and a small portion of the organic sulphur were removed, and ash was substantially reduced. The effect of process conditions (temperature, time, hydrogen peroxide and sulphuric acid concentrations) on the degree of desulphurization was studied and optimum conditions were established. The kinetics of the oxidation of pyritic sulphur were investigated for Mae Moh coal. The rate of reaction was found to be well represented by a continuous reaction model that was second order with respect to pyritic sulphur.