Effect of molten caustic leaching on demineralization and desulfurization of asphaltite

被引：17

作者：

Duz, M. Z. ^{[1
]}

Erdogan, S. ^{[1
]}

Saydut, A. ^{[2
]}

Merdivan, M. ^{[3
]}

Hamamci, C. ^{[1
]}

机构：

[1] Dicle Univ, Fac Sci & Art, Dept Chem, TR-21280 Diyarbakir, Turkey

[2] Dicle Univ, Fac Engn, Min Dept, TR-21280 Diyarbakir, Turkey

[3] Dokuz Eylul Univ, Fac Sci & Art, Dept Chem, Izmir, Turkey

来源：

ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS | 2008年 / 30卷 / 17期

关键词：

asphaltite; coal; demineralization; desulfurization; molten caustic leaching; Southeast Anatolia;

D O I：

10.1080/15567030701268393

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Molten caustic leaching process is effective in reducing significant amounts of ash-forming minerals, pyritic sulfur, and organic sulfur from solid fossil fuels. The effect of leaching asphaltite samples from Seguruk and Harbul collieries of Sirnak and Silopi asphaltite fields (situated in the Southeast Anatolia region of Turkey) with molten sodium hydroxide and followed by mild acid on demineralization and desulfurization was investigated. The effects of alkali/asphaltite ratio, time, and temperature on the leaching efficiency were detailed, and the experimental results are presented here. Chemical demineralization and desulfurization of asphaltite samples using molten sodium hydroxide were investigated in the temperature range of 200 degrees C-400 degrees C. The percentage of demineralization and desulfurization increased with the increase in alkali/asphaltite ratio. The removal of total sulfur and ash increased with increasing leaching temperature and time. Most of the inorganic sulfur and a significant portion of the organic sulfur were removed.

引用

页码：1637 / 1644

页数：8

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