Demineralisation of lignites by single and successive pretreatment
Küçük Resim Yok
Tarih
2003
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier Sci Ltd
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
In this study, two Turkish lignites (Bolu-Mengen, Kutahya-Tuncbilek) were treated under atmospheric and reflux conditions with 10-30% NaOH, 10% HCl and 10% H2SO4 solutions, singly and/or successive treatments to determine the effects of this treatment on the mineral matter and acidic functional groups. Characterisation of the treated and untreated samples was by Fourier transform infrared spectroscopy. The process of successive pretreatment was found to be more effective than single steps in terms of demineralisation and removal of carboxylate structures. During NaOH treatment, the first of successive steps, salts soluble in acid but not in water were determined. In successive demineralisation steps with 30% NaOH and 10% HCl, a low level of 3.3% ash was obtained for the Tuncbilek lignite. In addition, during the pretreatment, most of the Ca and K were exchanged with Na. (C) 2003 Elsevier Science Ltd. All rights reserved.
Açıklama
Anahtar Kelimeler
lignite, pretreatment, demineralisation, functional groups
Kaynak
Fuel
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
82
Sayı
12
