The role of MgO in the binding of SO2 by lime-containing materials
The role of MgO in the binding of SO2 by lime-containing materials
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DOI：
10.1007/s10973-005-0699-1
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发表时间：
2005-05
影响因子：
4.4
通讯作者：
T. Kaljuvee;A. Trikkel;R. Kuusik;V. Bender
中科院分区：
文献类型：
--
作者：
T. Kaljuvee;A. Trikkel;R. Kuusik;V. Bender
The results of investigation of MgO participation in the binding of SO2with lime-containing materials as sorbents are presented. Experiments of SO2binding into solid phase using model samples of reactive grade MgO and CaO varying the mole ratio of MgO/CaO from 9:1 to 1:9 were carried out. Besides, dolomite and limestone samples with different MgO/CaO mole ratio (from 1.24 to 0.13) and samples of ashes formed at combustion of Estonian oil shale (containing 35-40% of carbonates) and its semicoke were studied Initial samples, intermediate and final products were subjected to chemical, IR-spectroscopy, X-ray and BET specific surface area analyses. The results of the present study confirmed the active participation of MgO in the binding of SO2into the solid phase. In addition to CaSO4the formation of Ca,Mg-double sulphate CaMg3(SO4)4and ß-MgSO4was observed. The presence of CaMg3(SO4)4was fixed in a large temperature range 400-900°C and that of ß-MgSO4in between 500-700°C. The optimum temperature range for formation and durability of CaMg3(SO4)4was 700-800°C.
