Effect of pH and agitation time on combustible recovery and ash rejection in a coal sample using selective hydrophobic coagulation

(Eng) This paper shows the effect of pH and agitation time (Agt) on combustible recovery and ash rejection for a Colombian bituminous coal sample from Cerrejón (La Guajira), using a Selective Hydrophobic Coagulation process. A 2 2 factorial central composite experimental design was used, varying the pH and the agitation time as entry variables. The sample was processes in a specially built coagulation cell. The results show that the selectivity of the process is highest in a pH range of 4 to 10, with ash rejection values above of 70%. The statistical analysis showed that pH is a variable that has a significant effect (95% confidence level) in the selective hydrophobic coagulation process, while the agitation time has no significance effect.

• Autores: Piñeres, Jorge Luis; Pertuz, Wilfran; Castro, Jeniffer
• Tipo de recurso: Article of journal
• Fecha de publicación: 2018
• Institución: Universidad del Valle
• Repositorio: Repositorio Digital Univalle
• Idioma: eng
• OAI Identifier: oai:bibliotecadigital.univalle.edu.co:10893/18072
• Acceso en línea: https://hdl.handle.net/10893/18072
• Palabra clave: Coagulación hidrofóbica selectiva; Rechazo de ceniza; Recuperación de combustible; Carbón; Hidrofobicidad; Selective Hydrophobic Coagulation; Ash Rejection; Combustible Recovery; Coal; Hydrophobicity
• Rights: closedAccess
• License: http://purl.org/coar/access_right/c_14cb