查询词典 hydrogen sulfide

PART 3 : DETERMINATION OF HYDROGEN SULFIDE, MERCAPTAN SULFUR AND CARBONYL SULFIDE SULFUR BY POTENTIOMETRY.

硫化物的测定。第3部分：用电位计对碳酰基硫化物和硫醇，硫化氢的测定

A new catalytic kinetic spectrophotometric method for the indirect determination of trace sulfide has been studied. The method was based on the inhibition of sulfide on the iron catalyzed oxidation of xylenol orange by hydrogen peroxide in NH3 medium.

在氨水介质中，硫离子可阻抑Fe催化过氧化氢氧化二甲酚橙褪色，并且催化体系和阻抑体系在570nm处吸光度的差值与硫离子浓度呈线性关系，据此建立了阻抑动力学光度法间接测定痕量硫离子的新方法。

Gas chromatography with sample-pretreatment by solid-phase micro-extraction and with pulse flame photometric detection was applied to the determination of 6 stenchy sulfides(hydrogen sulfide,carbon disulfide,methanethiol,1,2-ethanedithiol,dimethylthioether and carbonyl sulfide) in polluted air.

应用固相微萃取预处理技术，采用脉冲火焰光度检测器-气相色谱法测定污染空气中硫化氢、二硫化碳、甲硫醇、1，2-乙二硫醇、甲硫醚、羰基硫6种恶臭硫化物。

By investigating the performances and chemical stabilities of three anode catalysts, namely, Pt, MoS2 and composite metal sulfide (MoS2/NiS) in the condition of electrochemical oxidation of hydrogen sulfide, it is indicated that MoS2 and MoS2+NiS exhibit better catalytic activity than Pt, and that, at a temperature more than 450℃, MoS2 itself sublimes, while the composite catalyst MoS2/NiS containing both Mo and transition metal Ni remains stable.

考察了3种阳极催化剂Pt、MoS2及复合金属硫化物(MoS2/NiS)电化学氧化硫化氢的性能和在硫化氢环境下的化学稳定性，发现MoS2和复合MoS2/NiS催化剂比Pt具有更好的催化活性，但MoS2在温度超过450℃时会升华，而含有Mo和过渡金属Ni的复合MoS2/NiS催化剂在操作条件下很稳定。

For example, in the process of aeration or oxygen exposures, oxygen together with compounds in the sewage generates a different stench; Also, in the anaerobic process, in the role of microorganisms, sulfur from the sewage, reates hydrogen sulfide, mercaptans and sulfide compounds.

例如，在曝气或曝氧过程中，氧气可与污水中的化合物生成有异臭味的产物；又如，在厌氧过程中，污水中的硫在微生物的作用下，生成硫化氢、硫醇和硫醚等化合物。

A large number of bond-type complexes, as long as the hydrogen of the molecules covalently coupled to the molecular approach in an electronegative atom up, that constitutes a hydrogen bond, there are intramolecular hydrogen bonds and intermolecular hydrogen bonds of the points, will affect the formation of complex reaction carried out, such as in solution adding dioxa cyclohexane, or tetrahydrofuran, will reduce the alkylation reaction rate.

氢键型络合物为数众多，只要含氢的分子以共价键方式耦合到分子中一个电负性原子上去，即构成氢键，有分子内氢键和分子间氢键之分，络合物的形成将会影响反应的进行，如在溶液中加入二氧杂环己烷或四氢呋喃，都会降低烷基化反应速率。

Fluoride is a major component of the low hydrogen electrode. It can react with hydrogen during welding to produce hydrogen fluoride, and decrease the hydrogen content of weld bead.

氟化物是低氢系手工电焊条的主要成分之一，在焊接时可与氢反应产生氟化氢，使焊道氢的含量降低。

We get the optimum process scheme which is suitable for the unit, through analysising and comparising different absorption schemes in the incipience of running of PSA. As to different operation conditions during pressure swing absorption actual operating, we propose to refer absorption cycle time, hydrogen yield and recovery rate as target of process characteristic, study and find out the interrelation between process parameters which influences each other and controls guideline; Through optimizing process conditions, we find out the best operation clicking in actual production, then confirm the best range of absorption cycle time, which make hydrogen yield of plant, hydrogen products purity and hydrogen recovery rate come up to the production requirement at the same time.

通过装置运行初期对不同吸附方案的分析、比较，选出适合本套装置的最优方案，针对变压吸附实际运行过程中的不同生产条件，提出了吸附时间、氢气产量和氢气回收率作为工艺条件研究的主要对象，找出相互影响的工艺参数和控制指标的相互关系；通过对工艺条件的优化，找出实际生产中最佳操作点，确定吸附时间的最佳范围，使装置氢气产量、氢产品纯度和氢气回收率同时满足生产要求，并对影响氢气回收率的其他因素进行了阐述，对优化操作提出建议。

The results show that:First, concentration of hydrogen peroxide have the most obvious influence to oil yield and carbon black yield,with the increase of concentration of hydrogen peroxide the oil yield first increase then decrease,when concentration of hydrogen peroxide is 8.19% or so,the oil yield reach to the biggest value, and with the increase of concentration of hydrogen peroxide carbon black yield decrese;Then,reaction time have more obvious influence to oil yield and carbon black yield,oil yield increase but carbon black yield decrease with the increase of reaction time;Thirdly,reaction tempreture have some influence to oil yield and carbon black yield,samely,oil yield increase but carbon black yield decrease with the increase of reaction tempreture;Finally,reaction pressure does almost no influence on oil yield and carbon black yield.

研究结果表明：过氧化氢质量浓度对产油率和炭黑产率的影响最为显著，产油率随过氧化氢质量浓度的提高先提高后降低，在过氧化氢质量浓度为8.19%左右时达到最大值，炭黑产率随过氧化氢质量浓度的提高而降低；反应时间对产油率和炭黑产率的影响也比较显著，产油率随反应时间的增加而提高，炭黑产率随反应时间的增加而降低；反应温度对产油率和炭黑产率也有一定的影响，产油率随反应温度的提高而相应地提高，炭黑产率随反应温度的提高而降低；在本文实验范围内，反应压力对产油率和炭黑产率基本上没有影响。

This paper introduced a few of methods of hydrogen storage,including compressed hydrogen, liquidized hydrogen,metal hydrides,carbon nanotubes,organic liquid hydrides storage,and commented their recent developments,and pointed out direction of hydrogen energy storage progress.

介绍了高压压缩储氢、深冷液化储氢、金属氢化物储氢、碳纳米管吸附储氢及有机液体氢化物储氢等几种储氢技术的发展现状，并指出储氢技术未来的发展方向。

B: Yes, I think it does.

是的，我想是我的。

This study has examined cell populations from human fetal femurs in comparison with adult-deried mesenchymal cell populations.

本研究检测了胎儿股骨细胞群，并与**间充质细胞群进行了比较。