Factors Affecting Quality of Dried Low-Rank Coals
| Autor: | David Low Yi Ngo, Chew Soon Hoe, Muthusamy Karthikeyan, J. V. M. Kuma |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
medicine.medical_specialty
Waste management Moisture Chemistry business.industry General Chemical Engineering technology industry and agriculture Carbochemistry respiratory system Combustion complex mixtures respiratory tract diseases Cracking Proximate analysis otorhinolaryngologic diseases medicine Heat of combustion Coal Physical and Theoretical Chemistry business |
| Zdroj: | Drying Technology. 25:1601-1611 |
| ISSN: | 1532-2300 0737-3937 |
| Popis: | The chemical and physical properties of coal are strongly affected by the upgrading process employed. For high-moisture coals, upgrading involves thermal dehydration to improve the calorific value of the coal on mass basis. This study evaluates the feasibility of upgrading a low-rank/grade coal using the oven drying method. The objective of this research work is to study the drying characteristics of low-rank coals and to understand the factors affecting the quality of dried low-rank coals. This article describes laboratory experiments conducted on the characterization of the low-rank coals before and after the drying process. The results on drying kinetics, re-absorption of coal samples, and proximate analysis of coal samples before and after drying are discussed. It was found that the upgrading process produced coal with better heating value and combustion characteristics than those of the raw coal samples. |
| Databáze: | OpenAIRE |
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