细菌菌液脱除H2S的工艺条件

通过Fe2(SO4)3对H2S的吸收实验,初步研究了氧化亚铁硫杆菌培养液脱除含H2S气体的工艺条件。利用单因素实验考察了不同气体流速、吸收液初始Fe3+浓度、初始pH值等条件下,吸收过程中脱硫效率的变化。实验结果表明气体流速为影响气液传质速率的主要因素,初始Fe3+浓度及初始pH值为对其影响不大。实验得到适宜的脱硫条件为：气体流速60 mL·min－1,初始[Fe3+]为10 g·L－1,初始pH值为2.0。在该条件下,氧化亚铁硫杆菌培养液脱除H2S的脱硫效率可以稳定在90％左右。     

工业烟气微生物脱硫的研究综述

以自然界硫素循环为基础,分别介绍了含H2S、SO2工业烟气微生物脱硫的原理,分析了微生物脱硫的典型工艺及其关键影响因素,指出了该技术的发展方向,对微生物在工业烟气脱硫中的实际应用有一定的指导意义。     

TiO2光催化脱H2S的应用

以钛酸丁酯为原料,采用溶胶-凝胶法制备纳米TiO2及掺杂改性TiO2,其中掺杂了过渡金属（Fe、Ni、Cu、Zn）,稀土金属（La、Ce）,贵金属（Ag）及非金属（N）,应用提拉法在载玻片上镀膜,进行光催化脱H2S实验。考察TiO2光催化脱H2S率。实验从不同离子、掺杂浓度、光照时间等因素考察TiO2光催化脱H2S性能的影响。结果表明：掺杂Fe,Ni,Cu,Zn,La,Ce,Ag及N的TiO2光催化脱H2S最佳掺杂量分别为0.7%,5.0%,4.0%,1.0%,3.0%,2.0%,1.0%和300%（均为TiO2摩尔分数）,其中0.7%Fe-TiO2,脱H2S率达97%。     

H2S在线分析仪的开发与研究

介绍基于比尔定律开发的H2S在线分析仪。该仪器主要应用于克劳斯硫磺回收系统，替代价格昂贵的进口仪表。     

一种天然气脱硫撬装装置设计

基于对天然气领域脱硫工艺的综合比较分析,发现传统的干湿脱硫法在天然气发展过程中存在工艺过程复杂、操作条件严苛、环境污染严重等基本问题。为了解决目前脱硫技术上存在的问题,提出了由高锰酸钾改性活性炭物理吸附和化学氧化、生物膜上微生物氧化、选择透过性膜过滤相结合的方法,对现有的脱硫技术进行改造升级。此外,结合撬装装置设计原理,研究出了一套新型的撬装脱硫装置。该装置可以最大限度脱除天然气中的H_2S并直接回收硫单质,实现资源二次利用并保护环境。结论认为,与现有天然气脱硫工艺相比较,所设计的新型脱硫装置,对天然气实施三次脱硫,能更为有效的脱除天然气中的H_2S,可以保证天然气的高利用率同时降低成本和能源损耗。     

TiO2光催化消除H2S的研究

在TiO2上进行了气相H2S光催化氧化消除的研究．氧对H2S的光催化氧化消除过程是不可缺少的，对含量为560mg／m^3的H2S，,当加入的氧气与原料气中H2S的分子比为42：1，空速为28000h^-1时，去除率达到97％．在HiS光催化氧化消除过程中，单质硫的产生可使TiO2失活，经光照再生单质硫转化为SO4^2-后，TiO2活性恢复，而且SO4^2-的生成对催化剂的中毒有抑制作用．     

H2S固体氧化物燃料电池的制备及其性能

采用尿素燃烧法制备La0.6Sr0.4Co0.2Fe0.8O3-δ(记作LSCF,下同)钙钛矿型阴极催化剂前体粉末,经800℃锻烧后具有典型的钙钛矿结构。在400～950℃温度范围内,催化剂具有较高的电导率,满足固体氧化物燃料电池阴极的要求。研究了以H2S为燃料气时,单体固体氧化物燃料电池(CoS-Mo2S)/BaCe0.9-xZrxY0.1O3/LSCF在不同温度下的电化学性能以及脱硫性能。结果表明:电池的最大电流密度、最大功率密度以及对H2S的脱除率均随温度的升高而增大;在反应温度为850℃,燃气流量为50 mL/min的条件下,电池的最大电流密度和最大功率密度分别为39.52 mA/cm2,6.38 mW/cm2;900℃时,H2S的脱除率达72%。     

生物法综合处理粘胶纤维生产废气中的H2S和CS2

介绍了生物法综合处理粘胶纤维生产废气中H2S和CS2的优势，并对其净化机理、菌种选择、处理装置及工艺进行了介绍。     

筛板塔Fe/Cu湿式催化氧化脱除H2S气体制硫磺的实验

阐述了筛板塔Fe/Cu湿式催化氧化脱除H₂S气体制硫磺流程,考察了操作空塔气速、液气比、起始pH值和H₂S入口浓度对H₂S脱除效率的影响及鼓风量、液柱高度对Fe^3＋氧化再生的影响;并进行了综合实验。结果表明,含120g/L的Cu²⁺、70g/L的Fe²⁺及70g/L的Fe³⁺的吸收体系即能对体积分数为1000×10^－6的H₂S废气近100％稳定脱硫,流程简短、能耗低,体系除消耗O₂外,过程不消耗原料,不产生二次污染,体系无降解问题。     

Removal of sulfur from Assam coal by bacterial conditioning and froth flotation

Reduction of sulfur by bacterial leaching from a high sulfur‐bearing coal sample from Assam was attempted. Flotation of the sample with light diesel oil could not depress the pyrite and also the Thiobacillus ferrooxidans was found to be ineffective in leaching the sulfur from the flotation concentrate. Conditioning of the same coal sample with Thiobacillus ferrooxidans was found to assist in selectively depressing the pyrite, thereby reducing nearly 60% of the pyritic sulfur present in the sample. © 1999 Society of Chemical Industry     

去除牛粪厌氧生物转化过程中的H2S

The main aim of this research was the experimental study at lab scale to check the absorption technology for the in situ removal of H2S from biogas during anaerobic digestion process. The reagent FeCl3 was used to check the removal efficiency of H2S produced from dairy manure during anaerobic bioconversion process. The experiments were conducted under mesophilic conditions. The composition of biogas was analyzed by gas chromatography analyzer equipped with flame photometer and thermal conductivity detectors. Experimental results under the same conditions demonstrate that high concentration of H2S in the form of FeS can be removed totally from the biogas using FeCl3 dosing with in anaerobic batch digester.     

甲醇/H2O/H2O2/1,3,5-三甲苯/磷酸三辛酯五元系液液平衡的实验数据

测定了常压、 4 0℃下甲醇 /H₂ O/H₂ O₂ /1,3,5 -三甲苯 /磷酸三辛酯五元系液液平衡数据 ,分别用UNIQUAC模型和NRTL模型对实验数据进行了关联 ,取得了较满意的结果     

微波/过氧化氢协同降解苯酚动力学

研究了微波/过氧化氢（MW/H₂O₂）系统催化氧化降解苯酚的动力学。结果表明,在单独的微波辐射（MW）或者过氧化氢（H₂O₂）氧化条件下苯酚去除率很小,而在MW/H₂O₂系统中有显著的提高,表明协同效应存在。另外,在三种工艺条件下苯酚的降解均符合表观一级动力学。在MW/H₂O₂系统中苯酚去除的速率常数增强因子可达到5.98,根据此系统中存在MW、H₂O₂和羟基自由基（·OH）三部分协同作用的降解机理,推导出了简化的苯酚降解动力学模型,较好的反应过氧化氢浓度过量条件下的苯酚降解。     

煤气净化中H2S干法脱除的研究进展

综述了活性炭、金属氧化物、复合金属氧化物和活性炭负载金属氧化物干法脱除H₂S的研究进展.分析了活性炭和单一金属氧化物在使用温度、脱硫效率和再生等方面的优缺点,指出复合金属氧化物和活性炭负载金属氧化物在使用温度、硫化效率和再生性能等方面都有很大改进,是应用前景广阔的脱硫剂.根据它们脱硫的原理和特点,结合半焦和活性炭性质上的相似性,对半焦负载金属氧化物制备脱硫剂的可行性进行了探讨.     

氯化铜脱除硫化氢气体制硫磺研究

A novel technology of removing H2S with cupric chloride solution was developed in this paper. Cupric as the form of CuS deposition, the CuS produced was then oxidized by excessive cupric ion in another reactor meanwhile cupric ion that has been consumed can be recovered by the oxidization of with oxygen in air, and the solution can be circulated. Moreover, the leaching kinetics of CuS by cupric ion was studied. The removal efficiency of H2S is close to 100%, and the required operating condition is mild. Compared with other wet oxidiza-tion methods, no raw material is consumed except O2 in air, the process has no secondary pollution and no problem of degradation and scale, and the absorbent is much stable and reliable.     

Selective oxidation of H2S in Claus tail-gas over SiC supported NiS2 catalyst

Very high activity and selectivity could be achieved for the direct oxidation of H₂S into elemental sulfur at low reaction temperature (40–60°C), on nickel sulfide supported SiC catalyst. The heterogeneous nature of the support surface (hydrophilic and hydrophobic areas) could explain the important role played by water to maintain a high and stable H₂S conversion level. The formation of a very active superficial nickel oxysulfide phase was proposed in order to explain the activation period necessary at reaction temperatures <60°C. Total selectivity for sulfur was attributed to the very low reaction temperature and the absence of any microporosity in the support.     

金属硫化物作为阳极材料对H2S固体氧化物燃料电池性能研究

Two anode catalysts with Pt, MoS2 and composite metal sulfides (MoS2 NiS), are investigated for electrochemical oxidation of hydrogen sulfide in solid oxide fuel cell (SOFC) at temperatures 750-850℃. The catalysts comprising MoS2 and MoS2 NiS exhibited good electrical conductivity and catalytic activity. MoS2 and composite catalysts were found to be more active than Pt, a widely used catalyst for high temperature H2S/O2 fuel cell at 750-850℃. However, MoS2 itself sublimes above 450℃. In contrast, composite catalysts containing both Mo and transition metal (Ni) are shown to be stable and effective in promoting the oxidation of H2S in SOFC up to 850℃. However, electric contact is poor between the platinum current collecting layer and the composite metal sulfide layer, so that the cell performance becomes worse. This problem is overcome by adding conductive Ag powder into the anode layer (forming MoS2 NiS Ag anode material) to increase anode electrical conductance instead of applying a thin laver of platinum on the top of anode.