高温抗烧结吸附剂对SeO2捕集性能

使用气固瞬时反应装置在700~1100℃下对不同氧化物（氧化镁、氧化铁、氧化铝、氧化钙）的硒捕集性能进行研究，确定吸附产物性质。基于此选取相应的典型矿物及双组分抗烧结吸附剂改善硒高温吸附能力。结果表明：900℃前氧化钙捕集效果最好，但1100℃时其吸附量迅速降低到167.59μg/g；γ-氧化铝在高温下捕集效果较好，1100℃时吸附量可达415.04μg/g，这与其优异的孔隙结构有关。钙基矿物方解石因其具有一定的抗烧结能力和发达的孔隙结构，表现出更好的高温捕集能力，1100℃时吸附量可提高到1064.97μg/g。双组分吸附剂高温捕集能力展现出不同程度的提高。钙-铝基吸附剂高温捕集性能提高相对较小；而钙-硅基吸附剂在高温下效果远高于单组分吸附剂，与氧化钙相比，1100℃时可提高1787.21μg/g。

Improved capture capacity of SeO2 by sorbents with anti-sintering at high temperature

Selenium (Se) capture capacity by different oxides (MgO, Fe₂O₃, Al₂O₃ and CaO) at 700—1100℃ were performed by a gas-solid instant reaction system to determine characteristics of adsorption products. Then, corresponding typical minerals and bicomponent composite sorbents with anti-sintering were chosen to improve Se capture capacity at high temperature. Results showed that the capacity of CaO was highest before 900℃, but noticeably decreased to 167.59μg/g as temperature rose to 1100℃. Capture capacity of γ-Al₂O₃ was greater at high temperature, which could reach 415.04μg/g at 1100℃ likely due to its great pore structure. Calcite, one of typical Ca-based minerals, indicated great high-temperature capture capacity because of its great anti-sintering and pore structure, and the capacity could be improved to 1064.97μg/g at 1100℃. Capture capacity of bicomponent composite sorbents at high temperature presented some improvement. Capacity of Ca-Al based sorbent increased slightly, while that of Ca-Si based sorbent was much higher than that of monocomponent based sorbents, which increased by 1787.21μg/g than that of CaO.