H2S Absorption Behavior of Calcium Ferrite Prepared in the Presence of Coal
H2S Absorption Behavior of Calcium Ferrite Prepared in the Presence of Coal
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DOI：
10.1021/ef049907z
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发表时间：
2005
期刊：
影响因子：
5.3
通讯作者：
N. Ikenaga;Yousuku Ohgaito;Toshimitsu Suzuki
中科院分区：
文献类型：
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作者：
N. Ikenaga;Yousuku Ohgaito;Toshimitsu Suzuki
以雅鲁藏布江煤（YL）为原料，制备了铁酸钙（CaFe 2 O 4）高温烟气脱硫剂。将在水溶液中的硝酸钙和硝酸铁浸渍到YL上，然后将其在70 °C下真空干燥并在空气中在各种温度下煅烧。使用配备有四极杆质谱仪的固定床流动型反应器评价吸收剂的性能。YL炭负载CaFe_2O_4（CaFe_2O_4/YL）的比表面积约为1.5 × 10 ~（-1）。25 m2/g，并且其值与通过共沉淀法制备的未负载铁氧体的值为相同数量级。CaFe 2 O 4/YL的形貌结构显示出粗糙的表面和大孔结构;而干法和共沉淀法制备的未负载铁氧体表面光滑平整。在500 °C下测定了CaFe 2 O 4/YL对H2S的吸收性能，发现CaFe 2 O 4/YL对H2S的吸收量几乎达到了化学计量比的100%。
Calcium ferrite (CaFe2O4) absorbents of hydrogen sulfide (H2S) for hot-gas cleaning were prepared in the presence of Yallourn coal (YL). Calcium and iron nitrates in aqueous solution were impregnated onto YL, which was then dried at 70 °C in vacuo and calcined at various temperatures in air. The performance of the absorbent was evaluated using a fixed-bed flow-type reactor that was equipped with a quadrupole mass spectrometer. The surface area of the YL char-loaded CaFe2O4 (CaFe2O4/YL) was ca. 25 m2/g, and its value was the same order of magnitude as those of unloaded ferrites that had been prepared by a coprecipitation method. The morphological structures of CaFe2O4/YL showed a rough surface with a macroporous structure; however, the surface of unloaded ferrites prepared by the dry process and the coprecipitation method was smooth and flat. When the absorption behaviors of CaFe2O4/YL for H2S were measured at 500 °C, the absorption capacity of H2S with CaFe2O4/YL exhibited almost 100% of the stoichiometri...