Improvement of dry desulfurization performance using activated calcium carbonate by amorphous citric acid complex method for diesel gas purification
Improvement of dry desulfurization performance using activated calcium carbonate by amorphous citric acid complex method for diesel gas purification
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DOI：
10.1007/s10163-019-00942-1
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发表时间：
2020-01
影响因子：
3.1
通讯作者：
Y. Osaka;T. Tsujiguchi;A. Kodama;Hongyu Huang
中科院分区：
文献类型：
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作者：
Y. Osaka;T. Tsujiguchi;A. Kodama;Hongyu Huang
中型设施的燃烧废气中的二氧化硫（SO2）会污染空气，因此必须去除。本研究以简单脱硫材料捕集SO2的干法脱硫过滤器，特别是碳酸钙为研究对象，以扇贝壳等海洋废弃物为主要原料，采用无定形柠檬酸络合法合成物理改性钙化合物，以提高低温脱硫效果。考察了煅烧温度、柠檬酸浓度等反应条件对产物的影响，得到了具有高比表面积和理想孔径分布的材料。在有机酸分子与Ca ~（2+）离子的摩尔比为4：1，煅烧温度为823 K的条件下，得到了比表面积为166 m2/g，孔径为8 μ m的碳酸钙。改性碳酸钙的脱硫通过热重分析来评价颗粒性能，其中碳酸钙洗涂到整料上以代表实际使用条件。结果表明，改性碳酸钙的脱硫性能优于市售碳酸钙，且具有上级的脱硫性能。
Sulfur dioxide (SO2) in combustion exhaust gas from medium-scale facilities must be removed because it pollutes the air. In this study, dry-DeSOxfilters, particularly calcium carbonate, that used simple desulfurization materials to capture SO2is focused on. Physically modified calcium compound, which is the main ingredient of marine waste such as scallop shell, was synthesized using the amorphous citric acid complex method to improve low-temperature desulfurization. The effects of reaction conditions such as calcination temperature and concentration of citric acid were investigated to obtain materials with high specific surface areas and desirable pore-diameter distribution. Calcium carbonate, with a specific surface area of 166 m2/g and pore diameter of 8 Å, was obtained under a 4:1 molar ratio of organic acid molecules to Ca2+ions and 823 K calcination temperature. The desulfurization of the modified calcium carbonate was evaluated by thermogravimetric analysis for particle performance with calcium carbonate wash-coated onto a monolith to represent real-use conditions. All these results indicated that the desulfurization performance of the modified calcium carbonate was superior to that of commercially available calcium carbonate.