Desulfurization of Hot Coal-Derived Fuel Gases with Manganese-Based Regenerable Sorbents. 3. Fixed-Bed Testing
Desulfurization of Hot Coal-Derived Fuel Gases with Manganese-Based Regenerable Sorbents. 3. Fixed-Bed Testing
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DOI：
10.1021/ef00050a024
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发表时间：
1995-03
期刊：
影响因子：
5.3
通讯作者：
R. Ben-Slimane;M. T. Hepworth
中科院分区：
文献类型：
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作者：
R. Ben-Slimane;M. T. Hepworth
在最近的研究中，建立了使用锰基吸附剂颗粒从热煤衍生燃料气体中去除H2S的热力学可行性，以及随后用空气再生负载（硫化）颗粒。在700-1000 °C的温度范围内，使用H2S-H2气体混合物在热重装置（TGA）中对由含锰化合物（矿石或MnCO 3）、氧化铝（Al 2 O3）和有机或无机粘合剂组成的多种配方进行了筛选硫化试验发现命名为FORM 4-A的制剂具有硫容量、反应性和强度的最佳组合。再生测试确定，对于T ≥ 900 °C，负载的颗粒可以在10-15分钟内用空气完全再生，而不形成硫酸盐。本文报道了领先的Mn基吸附剂颗粒制剂的固定床测试（即，表格4-A）。使用模拟Tampella-U燃气进行硫化和空气进行再生，进行实验来测试吸附剂的长期耐久性和可再生性。此外，在800-1000 °C范围内确定了温度对硫化反应平衡的影响。根据Turkdogan最近的研究和所获得的结果，对涉及固体MnO、MnS、Mn 3 O 4和MnSO 4的反应平衡态进行了重新评估。
In recent studies, the thermodynamic feasibility of using manganese-based sorbent pellets for the removal of H 2 S from hot coal-derived fuel gases, and the subsequent regeneration of loaded (sulfided) pellets with air was established. Screening sulfidation tests on a number of formulations, consisting of a manganese-containing compound (ore or MnCO 3 ), alundum (Al 2 O 3 ), and organic or inorganic binders, were carried out using H 2 S-H 2 gas mixtures in a thermogravimetric apparatus (TGA) at temperatures ranging from 700-1000 °C. A formulation, designated FORM4-A, was found to possess the best combination of sulfur capacity, reactivity, and strength. Regeneration tests determined that for T ≥ 900 °C, loaded pellets can be fully regenerated with air in 10-15 min, without sulfate formation. This paper reports on fixed-bed testing of the leading Mn-based sorbent pellet formulation (i.e., FORM4-A). Experiments are carried out to test the long-term durability and regenerability of the sorbent using a simulated Tampella-U fuel gas for sulfidation and air for regeneration. In addition, the effect of temperature on sulfidation reaction equilibrium is determined in the range 800-1000 °C. A reassessment of the equilibrium states of reactions involving solid MnO, MnS, Mn 3 O 4 , and MnSO 4 is then presented based on the results obtained and a recent study by Turkdogan.