Graduate School of Environmental Studies, Tohoku University, 6-6-07 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan.
Chemosphere. 2010 Oct;81(5):658-62. doi: 10.1016/j.chemosphere.2010.07.066. Epub 2010 Aug 25.
It is important to treat gaseous HCl from incineration streams efficiently to avoid adverse environmental consequences. In this paper, a new treatment method for gaseous HCl is presented-the application of Mg-Al layered double hydroxide (LDH) intercalated with CO(3)(2-) (CO(3)·Mg-Al LDH) to treat gaseous HCl continuously. The degree of HCl removal without water vapor is higher than that with water vapor; further, this reaction does not require H(2)O. In addition, the degree of HCl removal increases with increasing temperature, CO(3)·Mg-Al LDH quantity, HCl concentration, and improved contact between CO(3)·Mg-Al LDH and HCl gas. The treatment of HCl gas by CO(3)·Mg-Al LDH leads to the production of Mg-Al LDH intercalated with Cl(-). Further, HCl is also absorbed on the surface of CO(3)·Mg-Al LDH. Our proposed treatment method works effectively for the treatment of gaseous HCl from incinerator streams.
有效处理焚烧炉尾气中的 HCl 气体对于避免产生不良的环境后果非常重要。本文提出了一种处理 HCl 气体的新方法——应用 CO32-插层镁铝水滑石（CO3·Mg-Al LDH）连续处理 HCl 气体。该方法在无水蒸气和有水蒸气的情况下脱除 HCl 的程度均较高，且无需 H2O。此外，随着温度、CO3·Mg-Al LDH 用量、HCl 浓度的升高以及 CO3·Mg-Al LDH 与 HCl 气体接触的改善，HCl 的脱除程度也随之提高。CO3·Mg-Al LDH 处理 HCl 气体后会生成 Cl-插层的镁铝水滑石，HCl 也会吸附在 CO3·Mg-Al LDH 的表面。我们提出的处理方法对焚烧炉尾气中的 HCl 气体处理效果显著。
