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yyrhyw

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坚持就是胜利!

[求助] 急需要翻译这段,谢谢

The CO2-binding by Ca-Mg-silicates in direct aqueous carbonation of oil shale ash and steel slag This study was focused on carbonation of waste materials having low water-solubility in which Ca and Mg are generally bound as silicates. Here, pulverized firing oil shale ash (PFA from Narva Power Plants, Estonia), electric arc furnace slag (EAFS, types 1 and 2 from Uddeholm Tooling, Sweden) and ladle slag (LS from Uddeholm Tooling, Sweden) were studied as sorbents for binding CO2 from flue gases in direct aqueous mineral carbonation process. The experiments were carried out at room temperature and atmospheric pressure.Results showed that Ca-Mg-silicate phases bound up to 9 g of CO2 per 100 g of initial ash, which formed 30% of the total CO2 bound in direct aqueous carbonation of PFA. The CO2 uptakes for steel slags (EAFS1, EAFS2 and LS) were 8.7g CO2/100 g EAFS1, 1.9 g CO2/100 gEAFS2 and 4.6 g/100g LS. Quantitative XRD analysis indicated that Ca2SiO4 and Ca3Mg(SiO4)2 were the main CO2 binding low solubility components of oil shale ash as well as steel slags. The main carbonation product was calcite (CaCO3), indicating that Mg-compounds were not reactive towards CO2 at these mild conditions.
Based on multifaceted studies on carbonation of oil shale ash, a new method for eliminating CO2 from flue gases by Cacontaining waste material was proposed. The process includes contacting the aqueous suspensions of Ca-containing waste
material with CO2 containing flue gas in two steps: in the first step the suspension is bubbled with flue gas keeping the pH levels in the range of 10–12 and in the second step keeping the pH levels in the range of 7–8. The water-soluble components such as free lime are carbonated in the first step and the components of low solubility, in which Ca is generally contained in the form of silicates, are carbonated in the second step.

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cheungsober

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【答案】应助回帖

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Mally89: 金币+1, 感谢应助,欢迎常来!~吼吼!~\(^o^)/~ 2012-04-02 20:29:18
yyrhyw: 金币+20, 翻译EPI+1, 有帮助, 谢谢 2012-04-03 20:25:29
油母页岩灰和钢铁渣这项研究的重点是硅酸盐矿物作为具有低水溶性的钙和镁一般结合的废弃材料碳化水直接碳化钙镁硅酸盐的 CO2结合。在这里,煤粉电弧炉烧油母页岩灰 (从纳尔瓦发电厂、 爱沙尼亚 PFA),渣 (EAFS,从乌德霍姆模具、 瑞典的类型 1 和 2) 和钢包渣 (从乌德霍姆模具、 瑞典 LS) 作为脱硫剂在结合直接水矿物碳化过程中的烟气中的二氧化碳进行了研究。在室温和大气压力条件下进行了实验。结果显示,钙 镁硅酸盐阶段结合达 9 克的二氧化碳每 100 克的初始灰,形成直接水性碳化的煤灰中的 CO2 束缚的总数的 30%。钢铁渣 (EAFS1、 EAFS2 和 LS) 的二氧化碳吸收了 8.7 g CO2/100 g EAFS1,CO2/100 gEAFS2 和 4.6 g/100 g LS 1.9 g。定量 XRD 分析显示,Ca2SiO4 和 Ca3Mg (SiO4) 2 是主要的二氧化碳绑定低溶解度组件的油母页岩灰,以及钢铁渣。碳化主要产品是方解石 (CaCO3),该值指示镁化合物对二氧化碳在这些温和的条件下不起反应。
基于对碳化的油母页岩灰多方面研究,提出了消除烟气中的二氧化碳含钙废物材料的新方法。联系的含钙废物材料用二氧化碳包含两个步骤中的烟气的水质悬浮液的过程包括: 暂停冒泡与烟气保持 pH 水平,范围在 100 至 120 和保持 pH 水平 b 的范围中的第二个步骤中的第一步。水溶性成分等免费石灰被碳酸的第一步和组件的溶解度很低,通常包含钙的硅酸盐矿物,形式被碳酸在第二步。
2楼2012-04-02 17:03:52
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cheungsober

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形式被碳化在第二步。
3楼2012-04-02 17:05:44
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