The effect of aqueous caustic and various acid treatments on the removal of mineral matter in asphaltite

DOYMAZ I., Gulen J., Pişkin S., TOPRAK S.

ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS, vol.29, no.4, pp.337-346, 2007 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 29 Issue: 4
  • Publication Date: 2007
  • Doi Number: 10.1080/15567030600819882
  • Journal Name: ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.337-346
  • Keywords: asphaltite, demineralization, FTIR, mineral matter, X-ray diffraction, CHEMICAL DEMINERALIZATION, SIRNAK-ASPHALTITE, ALKALI TREATMENT, COAL, LIGNITES, SULFUR, TURKEY
  • Yıldız Technical University Affiliated: Yes

Abstract

In this present study, high mineral matter ( ash) asphaltites from Silopi, Southeastern Anatolia, Turkey were investigated using aqueous sodium hydroxide followed by various mineral acids such as HNO3, HCl, H2SO4, and HF. The extraction with 5% NaOH followed by leaching with 10% H2SO4 plus 40% HF was the optimum approach for chemical cleaning of the asphaltite and the maximum degree of the demineralization was found as 59.56%. At the same time, the calorific value increased to 20.86% according to the original sample. In addition, the spectrometric analyses of treated asphaltite samples were performed by FTIR and X-ray diffraction.