Fine structure of lignitous coals

✍ Scribed by A.M. Youssef

• Publisher: Elsevier Science
• Year: 1975
• Tongue: English
• Weight: 581 KB
• Volume: 13
• Category: Article
• ISSN: 0008-6223
• DOI: 10.1016/0008-6223(75)90249-3

✦ Synopsis

The adsorption of nitrogen at 78°K and 195"K, as well as adsorption of carbon dioxide at 78"K, 273°K and 298°K was measuredon non-activated and activated Beda lignitous coals. The original lignite sample was thermally heated at 400", 500", 600" and 800". The sample was activated either with 10 and 25 per cent zinc chloride or with steam to burn-outs of 10 and 25 per cent. Zinc chloride activation increases the adsorption capacity and micropore volume but does not affect the pore size. Steam activation on the other hand, produces the same effect as zinc chloride activation in its initial stages and at a certain stage, gasification with steam also widens the already existing pores altering thus the porous structure of the material. --