(中南工業(yè)大學(xué)化學(xué)系， 長沙 410083)
摘 要: 研究了以氯化鐵水溶液處理低硫化氫含量的廢氣，并用間接電解法回收其中的單質(zhì)硫和氫氣。 用氯化鐵水溶液處理硫化氫的過程包括三氯化鐵水溶液氧化吸收硫化氫和吸收液電解再生制氫兩部分。在實驗研究的基礎(chǔ)上綜合評價了H+濃度、Cl- 濃度對硫化氫吸收率的影響和鹽酸濃度對分解電壓的影響。在電解制氫過程中，鹽酸濃度降低到0.01 mol/L時分解電壓只有1 V左右，仍遠(yuǎn)低于電解水制氫的分解電壓。 實驗證明氯化鐵水溶液氧化吸收硫化氫制取單質(zhì)硫和電解制氫的循環(huán)是可行的。
關(guān)鍵字: 硫化氫 電解制氫 單質(zhì)硫
（Department of Chemistry,Central South University of Technology, Changsha 410083, P. R. China）
Abstract:The indirect electrolysis method using FeCl3 aqueous solution to treat waste gas containing low concentration H2S has been studied with S and H2 as the products. The H2S recovery system consists of two processes: oxido-absorbing H2S from waste gas by FeCl3 aqueous solution, and electrolyzing the absorbing solution to produce H2. Based on the experimental data, the influences of H+ and Cl- concentrations on the absorptivity of H2S, and the influences of HCl concentration on the decomposition voltage have been discussed. In the process of electrolysis, the decomposition voltage of the absorption solution will be only about 1 V, much lower than that of water when the concentration of HCl is reduced to 0.01 mol/L. The cycling of using FeCl3 aqueous solution to absorb H2S and recover S, and then reproduce H2 by electrolyzing the solution has been proved to be feasible.
Key words: hydrogen sulfide oxido-absorption electrolytic hydrogen production sulfur
