Basic Study on Exhaust Gas Treatment from Waste Pyrolysis by Metal Oxides Absorption

氢氯化物和氢硫基从废物幽门螺杆菌过程中被释放，导致环境灾害和气体的严重腐蚀和侵蚀。在一般情况下，一些金属氧化物的自然资源被用于从有毒气体中清除的这些酸气体。考虑为未来节省自然资源，这对开发一个新的天然气治疗系统非常重要，因为它需要最低限度的自然资源来实现规章制度。我们专注于这样的固体废物，即煤炭燃烧的灰烬和煤炭slag，在金属氧化物中，它们有反应性地走向酸性气体。根据这一点，我们评估了这些固体废物作为酸性气体吸收的可能性。HCI吸收实验由煤炭燃烧ash显示，HCI吸收能力增加了，其中含有钙化合物数量的增加。在673和873 K之间有一个HCI吸收的最佳温度范围。它发现了Ca成分的一部分，但没有显示HCI吸收的任何反应。这类钙成分被认为是以SEM/EDX对灰烬表面的元素分布分析的形式进行的，并以SEM/EDX的形式进行了熔融淀粉、氧化物和硫酸盐的形式进行了分析。发现了煤炭碎片具有对H-D22-H-D2 S捕获的反应，以及煤炭碎片在早期阶段的反应非常快速。铁组件，在煤渣中加入，在硫酸捕获中扮演了一个重要的角色。这并不是观察到的，因为煤渣中的钙成分显示出与硫酸盐的反应。它被澄清为含有H-D22-D2 S的煤渣的反应性主要被煤渣颗粒表面上的铁含量的数量所影响。铁向硫转化的温度的影响在1123 - 1273 K的范围内没有明显地找到。

Hydrogen chloride and hydrogen sulfur discharged from waste pyrolysis process causes environmental disasters and severe corrosion and erosion of the gasifier. In general, natural resources of some metal oxides are utilized for the removal of of these acid gases from exhaust gas. Considering the saving of natural resources for the future, it is very important to develop the new gas treatment system that needs the minimum natural resources for achieving the regulation. We focused on the solid waste such as coal burnt ash and coal slag involved in metal oxides which has reactivity towards acid gases. Based on the point, we evaluated the ability of these solid wastes as acid gases sorbent.HCI absorption experiment by coal burnt ash showed that the HCI absorption capacity increased with the increment of the amount of Ca-compounds contained in the ash. There was an optimum temperature range between 673 and 873K for HCI absorption for the employed ash samples. It was found that a part of Ca component did not show any reactivity for HCI absorption. Such Ca component was considered to be in form of melted amorphous silicate, oxide and sulfate, in accordance with the element distribution analysis on the surface of ashes by SEM/EDX.It was found that coal slag has a reactivity for HィイD22ィエD2S capture at high temperature and the sulfidation reaction of coal slags was very rapid at early stage of reaction. The iron component, involved in coal slags, played a important role in sulfur capture. It was not observed that calcium component in coal slags showed reactivity with sulfur. It was clarified that the reactivity of coal slags with HィイD22ィエD2S was mainly influenced by the amount of Fe content on the surface of coal slag particle. The influence of temperature on the conversion of iron into sulfide was not clearly found in the range of 1123〜1273K.