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美国德克萨斯州Odessa的Sivalls公司开发了一种从含二氧化碳的气体中选择性地脱除硫化氢的工艺。该工艺已试验了二年。它与常用的气体处理方法如烷基胺洗涤法等有某些不同之处,大多数这类方法系连续操作并且能够再生,而Sivalls工艺——称为Slurrisweet工艺,不能再生,而且是间歇操作的。Slurrisweet工艺之开发,主要是为了处理硫化氢含量高达100克/100英尺~3的气体,据称在经济上能与其它方法相竞争。示范装置处理的气量为 相似文献
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采用 Stretford 法(图1)高效脱除低压酸性气体中的 H_2S 是一项十分成熟的工艺,目前这种方法已在众多不同的工业中用于处理各种各样的气体。其优点是:它能够利用一个生产元素硫的联合系统,在各种压力下选择性脱除 H_2S,并能将其脱除至极低含量;二次排放气无需处理;操作温度较低(约40℃)。表1列出了 Stretford 法的应用情况:共有105套装置,其中有的在运行,有的正 相似文献
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用克劳斯法生产的硫磺中含有硫化氢,在储存和运输过程中硫化氢会释放出来。硫化氢有强烈的毒性,并有引起燃烧和爆炸的危险。近来开展了从液体硫磺中脱除硫化氢 的研究工作,已取得进展。本文对日处理1320吨及22.4吨硫磺设备的尺寸及流程提出了设计意见。脱除硫化氢装置的流程如图1所示。从 相似文献
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通过对国内外改性活性炭脱除低浓度H_2S研究现状的分析,概述了活性炭相对于其他干法脱硫剂的优势,分析了改性活性炭脱除H_2S的反应机理,简述了活性炭自身的孔结构和表面化学环境对脱硫效果的影响,总结国内外学者运用不同浸渍剂对活性炭进行改性后活性炭的脱硫效果,分析了温度、湿度和O_2/H_2S的比值等操作参数在脱硫过程中的影响,介绍了改性活性炭脱硫后最常用的热再生法,以及活性炭脱除H_2S目前的工业应用并展望改性活性炭的发展前景。 相似文献
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李艳贵 《中国石油和化工标准与质量》2012,33(8):37
采用固体脱硫剂的脱硫方法统称为干法,采用溶液或溶剂作脱硫剂的脱硫方法统称为湿法,湿法以胺法(MDEA)脱硫和LO-CAT法脱硫为主流技术,本文通过对MDEA脱硫和LO-CAT法脱硫进行工艺和经济对比,分析适合天然气硫化氢脱除工艺,探讨对天然气脱除硫化氢工艺的选择和优化设计一些看法。 相似文献
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硫化氢气体是一种日益引起全球重视的大气污染公害,它是典型的恶臭类气体,具有污染范围很广、影响很大的特点。硫化氢治理技术的发展在保护环境方面起了越来越重要的作用。本文从讲述国外硫化氢制酸技术的进展,到国内硫化氢回收技术的发展,并重点讲述国内科洋环境工程(上海)有限公司硫化氢制酸技术。国内技术的推广,为我国企业循环经济、绿色工业的推进发挥了重要作用。 相似文献
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该文论述了脱除变换气中的 H_2S 的必要性;介绍了脱除办法(在变换气进入碳化之前,设置一个焦炭脱硫塔以脱除变换气中的 H_2S 成分)。文章认为,如果将焦炭用于变换气脱硫,将会产生比 RS—1活性炭用于二次脱硫更好的效果。 相似文献
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介绍了较为先进有效的几种脱除硫化氢方法的机理、应用现状以及每种方法的特点,对吸收法、气-固吸附法、氧化法、分解法、微生物法分类介绍,最后总结出不同情况下的硫化氢可采用的不同类型的脱除方法。 相似文献
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Hydrogen sulfide was separated from highly saline wastewater by emulsion liquid membranes (ELMs). Such membranes consist of polyalkenyl succinimide as emulsifying agent, diethanolamine as carrier, kerosene as membrane, and sodium hydroxide as stripping solution. The effect of four surfactants on the stability of ELMs was investigated and every operational parameter was tested. The highest achievable separation efficiency was 99.73 % for a 100 mg L–1 solution. Obviously, the salinity of the external phase has a negligible effect on the separation of H2S using ELMs. 相似文献
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A. N. Startsev O. V. Kruglyakova Yu. A. Chesalov S. Ph. Ruzankin E. A. Kravtsov T. V. Larina E. A. Paukshtis 《Topics in Catalysis》2013,56(11):969-980
A new catalytic reaction of hydrogen sulfide decomposition is discovered, the reaction occurs on metal catalysts in gas phase according to equation $$2{\text{H}}_{2} {\text{S}} \leftrightarrow 2{\text{H}}_{2} + {\text{S}}_{2}^{{({\text{gas}})}}$$ 2 H 2 S ? 2 H 2 + S 2 ( gas ) to produce hydrogen and gaseous diatomic sulfur, conversion of hydrogen sulfide at room temperature is close to 15 %. The thermodynamic driving force of the reaction is the formation of the chemical sulfur–sulfur bond between two hydrogen sulfide molecules adsorbed on two adjacent metal atoms in the key surface intermediate and elimination of hydrogen into gas phase. “Fingerprints” of diatomic sulfur adsorbed on the solid surfaces and dissolved in different solvents are studied. In closed vessels in adsorbed or dissolved states, this molecule is stable for a long period of time (weeks). A possible electronic structure of diatomic gaseous sulfur in the singlet state is considered. According to DFT/CASSCF calculations, energy of the singlet state of S2 molecule is over the triplet ground state energy for 10.4/14.4 kcal/mol. Some properties of gaseous diatomic sulfur are also investigated. Catalytic solid systems, both bulk and supported on porous carriers, are developed. When hydrogen sulfide is passing through the solid catalyst immersed in liquid solvent which is capable of dissolving sulfur generated, conversion of hydrogen sulfide at room temperature achieves 100 %, producing hydrogen in gas phase. This gives grounds to consider hydrogen sulfide as inexhaustible potential source of hydrogen—a very valuable chemical reagent and environmentally friendly energy product. 相似文献
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Marc Lincke Uwe Petasch Uwe Gaitzsch Andreas Tillmann Michael Tietze Falko Niebling 《化学工程与技术》2020,43(8):1564-1570
Hydrogen sulfide (H2S) removal from biogas is essential to allow biogas storage in the natural gas grid. Several established methods exist, most of them making use of non-reusable substrates such as iron sponge or active carbon. Coated metallic foams provide a reusable sustainable alternative. Several iron oxides and hydroxides were tested to validate the H2S adsorption properties before and after thermal regeneration, i.e., sulfur removal. Amorphous iron hydroxide proved to efficiently clean biogas after maximum four sulfur removal cycles and showed an almost ten times larger capacity for sulfur adsorption than crystalline hematite Fe2O3. Very low H2S contents could be realized until breakthrough. 相似文献