(中南工业大学化学系， 长沙 410083)
摘 要: 研究了以氯化铁水溶液处理低硫化氢含量的废气，并用间接电解法回收其中的单质硫和氢气。 用氯化铁水溶液处理硫化氢的过程包括三氯化铁水溶液氧化吸收硫化氢和吸收液电解再生制氢两部分。在实验研究的基础上综合评价了H+浓度、Cl- 浓度对硫化氢吸收率的影响和盐酸浓度对分解电压的影响。在电解制氢过程中，盐酸浓度降低到0.01 mol/L时分解电压只有1 V左右，仍远低于电解水制氢的分解电压。 实验证明氯化铁水溶液氧化吸收硫化氢制取单质硫和电解制氢的循环是可行的。
关键字: 硫化氢 电解制氢 单质硫
（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
