Zeolite Formation from Coal Fly Ash and Its Adsorption Potential
| Autor: | Prasert Pavasant, Ronbanchob Apiratikul, Doungmanee Rungsuk, Duangkamol Ruen-ngam |
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| Rok vydání: | 2009 |
| Předmět: |
Time Factors
Mineralogy Management Monitoring Policy and Law Raw material Coal Ash chemistry.chemical_compound Adsorption Air Pollution Cation-exchange capacity Sodium Hydroxide Coal Zeolite Waste Management and Disposal Air Pollutants Ion exchange business.industry Chemistry Temperature Carbon Refuse Disposal Sodium hydroxide Fly ash Zeolites Particulate Matter Crystallization business Nuclear chemistry |
| Zdroj: | Journal of the Air & Waste Management Association. 59:1140-1147 |
| ISSN: | 2162-2906 1096-2247 |
| DOI: | 10.3155/1047-3289.59.10.1140 |
| Popis: | The possibility in converting coal fly ash (CFA) to zeolite was evaluated. CFA samples from the local power plant in Prachinburi province, Thailand, were collected during a 3-month time span to account for the inconsistency of the CFA quality, and it was evident that the deviation of the quality of the raw material did not have significant effects on the synthesis. The zeolite product was found to be type X. The most suitable weight ratio of sodium hydroxide (NaOH) to CFA was approximately 2.25, because this gave reasonably high zeolite yield with good cation exchange capacity (CEC). The silica (Si)-to-aluminum (Al) molar ratio of 4.06 yielded the highest crystallinity level for zeolite X at 79% with a CEC of 240 meq/100 g and a surface area of 325 m2/g. Optimal crystallization temperature and time were 90 degrees C and 4 hr, respectively, which gave the highest CEC of approximately 305 meq/100 g. Yields obtained from all experiments were in the range of 50-72%. |
| Databáze: | OpenAIRE |
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