高含硫化氢天然气气侵时的溢流特性

以四川某高含H2S气体的气井井身结构及钻井工况为基础,针对高含H2S气井溢流时的特点,考虑H2S在水中的溶解度,建立溢流期间环空各相流体的质量和动量守恒方程,并用有限差分法对方程进行求解。结果表明:H2S在井底的溶解度远大于CH4的,在距井口约360 m开始大量析出;H2S的含量越高,气体在上升过程中密度变化越大,气体开始剧烈膨胀的位置越接近井口;井底侵入气体量相同的情况下,H2S的含量越高,气体的膨胀倍数越大,泥浆池增量也越大,同时,刚开始气侵时H2S含量越高气相的体积分数越小,而到达井口后H2S的含量越高气相的体积分数越大,导致溢流检测的难度和井控的危险程度增加;高含H2S气井溢流时井底压力的下降值、泥浆池增量、关井套压小于纯烃类的,不能反映真实的气侵程度,而且随着时间的增加情况会更严重;高含H2S气侵时压井过程中套压值与纯烃类的相差不大,因此可以在井口施加一定的压力,抑制H2S气体的膨胀,减缓井喷事故的发生。     

双马煤矿废弃油井周围煤层H2S分布特征及其采掘影响范围划分

针对废弃油井周围煤层H2 S分布规律不清楚,采掘过程中影响范围不明确给煤矿安全开采造成严重威胁的难题,以煤油重叠区的双马煤矿为研究区,首先采用数值模拟方法研究了煤层内H2 S气体的渗流规律,然后结合数值模拟结果通过气体成分测试获得了H2 S气体的分布规律,最后根据采掘过程中H2 S气体的涌出规律对其影响范围进行了确定.结果表明:废弃油井周围H2 S气体浓度随距离废弃油井增加呈递减分布,废弃油井内气体压力越高,H2 S气体渗透范围越大;工作面过废弃油井过程中H2 S气体浓度呈现出较高—降低—平稳—降低—急剧下降的变化规律;双马煤矿废弃油井影响区煤层H2 S气体的渗透半径为500 m,采掘影响范围为700 m.研究结果为工作面H2 S气体的治理提供指导.     

基于水合物的沼气净化技术

沼气的主要成分为CH4、CO2、H2S,使用前需对其进行必要的净化处理,使沼气的质量达到标准要求。气体水合物相平衡研究表明,单组分CH4、CO2、H2S气体及(CH4+CO2+H2S)三元体系在纯水中生成水合物的条件存在显著差异,可利用水合物的生成过程逐一脱除沼气中的H2S和CO2。基于此,提出了一种利用水合分离技术净化沼气的新工艺,以优化流程、降低能耗、提高分离效率。     

含硫化氢天然气井井喷事故后果数值模拟

 井喷事故后果严重,特别是当井喷物质中含有H2S等有毒气体时,会造成重大的人员伤亡和财产损失,研究含H2S天然气井喷气体的扩散蔓延规律具有重要的应用价值。本文建立了含H2S天然气井井喷事故模型,对含H2S天然气井喷事故进行了数值模拟计算,模拟得到含H2S天然气井喷事故中,井喷气体的速度及浓度场的分布情况。数值模拟结果表明井喷气体符合气体射流规律,并可以数值模拟结果为依据进行井喷事故发生后危险区域的划分。     

生物滴滤法去除硫化氢与苯乙酸混合废气

采用填充ZX03型填料的生物滴滤塔处理H2S与C6H5CH2COOH的混合制药废气。主要考察了不同进气浓度比例下H2S与C6H5CH2 COOH的去除效率，不同流量下的压力损失及气体停留时间对去除率的影响。结果表明：随着H2S与C6H5CH2COOH进气浓度比例的提高，H2S的去除率均保持在95％以上，C6H5CH2 COOH的去除率逐渐下降。当H2S与C6H5CH2COOH的进气质量浓度分别为P（H2S）〈400mg／m^3与ρ（C6H5CH2COOH）〈800mg／m^3，其最佳气体停留时间为30s。该生物滴滤塔压力损失小，无堵塞现象，可长期稳定运行。     

低温干燥H2S气体危害性研究

简述了低温干燥H2S气体与干燥铁氧化物硫化反应及硫化产物的自燃性,通过考察不同温度干燥H2S的自燃性,表明低温干燥H2S气体能与干燥Fe2O3在低温下发生硫化反应,且硫化产物自燃性较高,危险性大。     

H2S分子负脉冲流光放电等离子体解离分析

采用荧光发射光谱和荧光时间分辨光谱,对H2S分子进行了脉冲流光放电激发解离相关实验研究.将所得400～800 nm荧光谱线归属为S2、S2-、H、SH等活性粒子的发光.结果表明,H2S气体脉冲流光放电等离子体中的主要活性粒子是H2S*、S2、S2-、H、SH,且时间分辨光谱测量结果表明H和SH基荧光信号几乎同时出现,由...     

生物滴滤塔去除H_2S和苯混合废气实验研究

采用高效生物滴滤塔对H2S和苯混合气体进行长期实验研究,考察了进气浓度、喷淋量和冲击负荷对去除率的影响。实验结果表明:H2S进气浓度低于213 mg/m3时,H2S去除率在92.6%以上;苯进气浓度低于34 mg/m3时,苯去除率大于37%。苯气体浓度低于38.4 mg/m3时,苯对H2 S的去除效果影响较小。喷淋量为6.7～12 L/h时,H2 S和苯混合恶臭气体的去除率较高。研究表明,该生物滴滤塔具有较强的耐冲击负荷能力,操作简单,易于实现工业化。     

基于石英晶体微天平技术和离子液体对Oddy法的定量表征

报道用于博物馆极低浓度H2S气体的快速在线检测方法.分别以氯化1-丁基-3-甲基咪唑([Bmim]Cl)离子液体和铁基氯化1-丁基-3-甲基咪唑(Fe-[Bmim]Cl)离子液体作为敏感材料,结合石英晶体微天平(QCM)技术用于H2S气体的检测.其中[Bmim]Cl涂膜晶振对H2S的频率响应为0.34 Hz.(L.μg-1)H2S,检测下限8.88μg/L,Fe-[Bmim]Cl涂膜晶振对与H2S的频率响应为1.45 Hz.(L.μg-1)H2S,检测下限0.35μg/L,该值已接近博物馆允许的H2S气体浓度0.2μg/L.响应时间均小于60 s.     

滴滤塔式生物反应器去除硫化氢恶臭气体

为了治理H2S恶臭污染,研究采用装有ZX01型填料的生物滴滤塔,进行了长期实验室H2S脱臭试验.结果表明:该生物滴滤塔H2S的进气浓度低于300 ms/m3时,气体最佳停留时间为30 s,去除率接近100%,H2S代谢产物以硫酸根离子为主.该滴滤塔阻抗较低,无需经常进行反冲洗,可长期稳定运行.     

生物滴滤塔净化中低浓度H2S气体的挂膜实验研究

本文通过对两种填料处理硫化氢气体的挂膜实验研究,表明挂膜方法、填料性能、温度、PH值、入口浓度等均影响挂膜效果与硫化氢去除率,并且得出陶粒挂膜启动时间比阶梯环快。     

Synthesis and reaction of 16-electron Cp<Superscript>t</Superscript>Rh halfsandwich complexes containing 1,2-dichalcogenolate carborane ligands

The reactions of [Cp^tRhCi(μ-Ci)]2 (1) (Cp^t=^tBu2C5H3) with Li2E2C2B10H10 (E = S, Se) lead to the green 16-electron dichaicogenolate complexes Cp^tRh(E2C2B10H10) [E = S(2a), Se(2b)]. The 16-electron complexes 2a and 2b can take up two-electron donor ligands such as tert-butyi isonitrile and carbon monoxide to give the 18-electron dichaicogenolate derivatives Cp^t(L)(E2C2B10H10) [L = ^tBuNC, E =S(3a), Se(3b); L = CO, E = S(4a), Se(4b)]. The molecular structures of complexes 2a and 3a were determined by X-ray crystal structure analysis. The molecular structure of 16-electron complex 2a shows the pseudoaromatic system in IrSe2C2 five numbered ring.     

八种天然黄酮类化合物的抗氧化构效关系

采用H2O2－CTMAB－Luminol化学发光体系和Fe^2＋诱发脂蛋白PUFA过氧化比色体系，研究了八种高纯度的天然黄酮类化合物清除H2O2、LO和LOO的构效关系。结果表明，这八种天然黄酮类化合物都能 有效地清除H2O2、LO和LOO。根据其清除作用和化学结构分析，得出如下结论：B环上羟基是清除H2O2、LO和LOO的主要活性基团，A环上羟基是清除H2O2、LO和LOO的重要基团，并且B环上羟基相邻清除作用就大大增强；糖甙对清除H2O2、LO和LOO也有贡献。     

直接有限环

证明了如下结果:1)环R是直接有限环当且仅当每个右R-满射f:R→R是单射;2)若R是右C2环,则R是直接有限环当且仅当每个右R-单射f:R→R是满射当且仅当R/J(R)是直接有限环;3)设R是左半A-bel环,则R是直接有限环;4)设R,S是两个环,RVS是(R,S)双模,则C=RV     

Baer根的S-单环

证明Baer根的S－单环R有单位元的充要条件为R是有单位元的单环,从而证实：用Baer根的S－单环构造不平凡的原子根,则这环一定不能有单位元。     

拟AGP-内射模的自同态环

设R为环,Mg是拟AGP-内射模,S=End（MR）,文章主要研究了S的Jacobson根和半单性．在MR是自生成元时,证明了：1）J（S）=△,其中△={s∈S｜kers是M的本质子模};2）若S是满足特殊升链条件的半素环,则S是半单环．从而推广了AGP-内射环的一些结果．     

The controlling factors and distribution prediction of H2S formation in marine carbonate gas reservoir, China

Generally, there are some anhydrites in carbonate reservoir, as H2S is also familiar in carbonate oil and gas reservoirs. Nowadays, natural gas with high H2S concentration is usually considered as TSR origin, so there is close relationship between H2S and anhydrite. On the contrary, some carbonate rocks with anhydrite do not contain H2S. Recently, researches show that H2S is only a necessary condition of H2S formation. The reservoir porosity, sulfate ion content within formation water, reservoir temperature, oil/gas and water interface, hydrocarbon and some elements of reservoir rock have great controlling effects on the TSR occurrence. TSR deoxidizes hydrocarbon into the acidic gas such as H2S and CO2, and the H2S formation is controlled by TSR occurrence, so the relationship among reaction room, the contact chance of sulfate ion and hydrocarbon, the reservoir temperature has great influence on the TSR reaction. H2S has relatively active chemical quality, so it is still controlled by the content of heavy metal ion. Good conditions of TSR reaction and H2S preservation are the prerequisite of H2S distribu- tion prediction. This paper builds a predictive model based on the characteristic of natural gas reservoir with high H2S-bearing. In the porosity reservoir with anhydrite, the formation water is rich in sulfate and poor in heavy metal ion. Oil and gas fill and accumulate in the gas reservoir with good preservation conditions, and they suffered high temperature later, which indicates the profitable area of natural gas with high H2S-bearing.     

The controlling factors and distribution prediction of H_2S formation in marine carbonate gas reservoir,China

Generally, there are some anhydrites in carbonate reservoir, as H2S is also familiar in carbonate oil and gas reservoirs. Nowadays, natural gas with high H2S concentration is usually considered as TSR origin, so there is close relationship between H2S and anhydrite. On the contrary, some carbonate rocks with anhydrite do not contain H2S. Recently, researches show that H2S is only a necessary condition of H2S formation. The reservoir porosity, sulfate ion content within formation water, reservoir temperature, oil/gas and water interface, hydrocarbon and some elements of reservoir rock have great controlling effects on the TSR occurrence. TSR deoxidizes hydrocarbon into the acidic gas such as H2S and CO2, and the H2S formation is controlled by TSR occurrence, so the relationship among reaction room, the contact chance of sulfate ion and hydrocarbon, the reservoir temperature has great influence on the TSR reaction. H2S has relatively active chemical quality, so it is still controlled by the content of heavy metal ion. Good conditions of TSR reaction and H2S preservation are the prerequisite of H2S distribution prediction. This paper builds a predictive model based on the characteristic of natural gas reservoir with high H2S-bearing. In the porosity reservoir with anhydrite, the formation water is rich in sulfate and poor in heavy metal ion. Oil and gas fill and accumulate in the gas reservoir with good preservation conditions, and they suffered high temperature later, which indicates the profitable area of natural gas with high H2S-bearing.     

酿酒酵母SCH9基因缺失抑制其H2S代谢

H2S作为NO、CO之后的第三个气体信号分子,在心血管和神经系统方面的显著效果引起了人们的关注。酿酒酵母Sch9同源于人类S6K1,可以调节细胞周期和寿命。一定程度内增加细胞内H2S的浓度和SCH9缺失均可延长动物寿命,同样 H2S和Sch9也参与了热量限制延长寿命的机制。为了研究酿酒酵母SCH9缺失是否影响其H2S代谢,我们用GYY4137和NaHS作为H2S供体,用醋酸铅试纸检测反应体系中H2S含量,以酿酒酵母SCH9缺失型菌株RCD398、RCD399和TS120-2d为研究对象,探究SCH9基因缺失对其H2S代谢的影响。结果发现在SCH9缺失型菌株中,非热量限制和热量限制均下调其H2S的生成,也可下调其对外源H2S的代谢。由此推测酿酒酵母SCH9缺失既可以下调其H2S的生成,也可以下调其对外源H2S的代谢,这对酿酒酵母中H2S代谢的进一步研究奠定了理论基础。     

嘌呤结构和性质的密度泛函理论研究

嘌呤(purine)是一种重要的生物分子.用密度泛函理论(DFT)B3LYP方法,在6-311G**基组水平下,计算嘌呤的分子全优化几何构型、电子结构、自然键轨道(NBO)、IR光谱和热力学等性质.根据计算可知,嘌呤分子呈平面结构,整个分子构成大的共轭体系,具有一定的芳香性;嘌呤环上4个N原子有强的亲核活性,H13原子有强的亲电活性;求得并归属IR谱频率和强度以及200-1200K的热力学性质S0m,H0m和C0p,m,对深入研究嘌呤的反应和性质有帮助.