Measurements of mercury speciation and fine particle size distribution on combustion of China coal seams
Measurements of mercury speciation and fine particle size distribution on combustion of China coal seams
复制标题
中国煤层燃烧过程中汞形态和细粒度分布的测量
DOI：
10.1016/j.fuel.2012.06.069
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发表时间：
2013-02
期刊：
影响因子：
7.4
通讯作者：
Biswas P
中科院分区：
文献类型：
--
作者：
Zhang L;Daukoru M;Torkamani S;Wang S X;Hao J M;Biswas P
目前使用的空气污染控制装置 (APCD) 中去除的汞的百分比取决于燃煤炉排出的烟气中的形态。为了更好地了解三种汞（即 Hg0、Hg2+ 和 Hgp）在气相和细颗粒中的形成过程，对不同类型煤在落管式炉装置中燃烧产生的烟气进行了实验室规模的测量。据观察，由于化学反应动力学的限制，烟气中较高的汞浓度导致较低的 Hg2+ 比例。氯的浓度具有相反的效果，但不如汞那么显着。随着氯浓度的增加，Hg2+的比例增加。燃烧更细的煤粉会导致形成更多的 Hg2+。煤的矿物成分和原煤粒度对细颗粒的形成有很大影响。煤中铝含量的增加会导致更细颗粒的形成，而煤中铁含量的增加会增加较大颗粒的浓度。 Al和Si的共存可以增强颗粒的凝聚过程。当进煤量较高且进煤颗粒尺寸较小时，该过程也会得到增强。对富氧煤和传统空气燃烧的结果进行了比较。
The percentage of mercury that is removed in currently used air pollution control devices (APCDs) depends on the speciation in the flue gas exhausting from the coal combustor. Bench-scale measurements were carried out in the flue gas from combustion of different types of coal in a drop-tube furnace set-up to better understand the formation process of three mercury species, i.e. Hg0, Hg2+and Hgp, in gaseous phase and fine particles. It was observed that due to chemical reaction kinetics limitations, higher mercury concentrations in flue gas lead to lower Hg2+proportions. The concentration of chlorine has the opposite effect, not as significantly as that of mercury though. With the chlorine concentration increasing, the proportion of Hg2+increases. Combusting finer sized coal powders results in the formation of more Hg2+. Mineral composition of coal and feed coal particle size has a great impact on fine particle formation. Increased Al in coal results in more finer particle formation, while Fe in coal increases concentration of larger particles. The coexistence of Al and Si can enhance the particle coagulation process. This process is also enhanced at higher coal feed rates, and when feed coal particle sizes are smaller. Results from oxy-coal and conventional air combustion were compared.
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DOI：
10.1016/j.scitotenv.2005.09.044
发表时间：
2006-09
期刊：
The Science of the total environment
影响因子：
--
作者：
S. Ito;Takahisa Yokoyama;Kazuo Asakura
通讯作者：
S. Ito;Takahisa Yokoyama;Kazuo Asakura
DOI：
10.1080/10473289.2002.10470863
发表时间：
2002-11
影响因子：
2.7
作者：
T. Lee;E. Hedrick;P. Biswas
通讯作者：
T. Lee;E. Hedrick;P. Biswas
影响因子：
5.3
作者：
Achariya Suriyawong;Michael Gamble;Myong-Hwa Lee;R. Axelbaum;P. Biswas
通讯作者：
Achariya Suriyawong;Michael Gamble;Myong-Hwa Lee;R. Axelbaum;P. Biswas
影响因子：
11.4
作者：
J. Wilcox;J. Robles;David C. J. Marsden;P. Blowers
通讯作者：
J. Wilcox;J. Robles;David C. J. Marsden;P. Blowers
DOI：
10.3155/1047-3289.59.11.1331
发表时间：
2009-11-01
影响因子：
2.7
作者：
Bhardwaj, Ravi;Chen, Xihua;Vidic, Radisav D.
通讯作者：
Vidic, Radisav D.