The influence of carbon particle type in fly ashes on mercury adsorption

被引：53

作者：

Antonia Lopez-Anton, M. ^{[1
]}

Abad-Valle, Patricia ^{[1
]}

Diaz-Somoano, Mercedes ^{[1
]}

Suarez-Ruiz, Isabel ^{[1
]}

Rosa Martinez-Tarazona, M. ^{[1
]}

机构：

[1] CSIC, Inst Nacl Carbon, Oviedo 33011, Spain

来源：

FUEL | 2009年 / 88卷 / 07期

关键词：

Mercury; Fly ash; Unburned carbon; DENSITY GRADIENT CENTRIFUGATION; PULVERIZED FEED BLENDS; FIRED POWER-PLANTS; COAL-COMBUSTION; UNBURNED CARBON; RAMAN-SPECTROSCOPY; ELEMENTAL MERCURY; DIFFERING FORMS; CAPTURE; RETENTION;

D O I：

10.1016/j.fuel.2007.07.029

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：

080707 [能源环境工程]; 082001 [油气井工程];

摘要：

Recent research has shown that certain fly ash materials produced in coal combustion for power generation have an affinity for the mercury compounds present in flue gases. However, the exact nature of Hg-fly ash interactions is still unknown and the different variables that influence mercury adsorption need to be identified. In this work the microscopic components of fly ashes derived from the combustion of different types of feed blends of different coal rank and mercury adsorption were investigated. The aim of this research was to establish relationships between Hg retention and the type of unburned carbons present in various fly ashes. The fly ashes and fly ash fractions studied were used as sorbent beds for high mercury concentrations, conditions in which mercury retention is highly favored. From the results obtained it was confirmed that the role of the unburned carbon components in mercury capture may depend, among other factors, on the type of unburned carbon. Fly ashes capture different species of mercury depending on their nature and the type of anisotropic particles. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：1194 / 1200

页数：7

共 23 条

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Characterization of carbon concentrates from coal-combustion fly ash [J].