H2S低电耗电解制H2新方法

A new technique of lower electricity consumption electrolysis producing H2 has been developed, and the factors affecting producing H2 production were investigated. The results found that under the same electrolysis conditions, H2 production on the cathode increased with increasing electrolyte solution alkalinity; but decreased with increasing zinc ion concentration in the electrolyte solution. The results also revealed that H2 production on the cathode fluctuated with increasing electrolysis voltage, and reached a maximum when the voltage was at 0. 6 V. In a certainty range, it would be favorable to reduce the electricity consumption in H2 production with increasing electrolyte solution alkalinity; but the electricity consumption would be increase when electrolysis voltage was higher. Compared with producing H2 from H2O, the electrolysis voltage was lower by about IV, and the electricity consumption of H2 also decreased by 50% .     

硫化氢的提纯及应用

概括了介绍了硫化氢的应用及提纯工艺。     

氢氧化钡、氯化锌等产品的生产工艺改进

针对生产氯化钡、硫氢化钠等产品的化工厂的困境，在不做大量投资、不做大的改动、不改变原厂的基础上，提出了改善产品结构、革新生产工艺的方法。原有生产状况是：利用原料硫化钡、盐酸、硫化钠生产氯化钡和硫氢化钠，但氯化钡亏损，整体效益差。改进新工艺为：在原有原料中增加氧化锌，即以粗质氧化锌、硫化钡、盐酸、硫化钠为原料生产氢氧化钡、氯化锌、硫氢化钠，以效益好的氢氧化钡、氯化锌取代了氯化钡，并保存了原来效益好的硫氢化钠，整体效益大大提高。     

沉淀分离-络合滴定法测量硫化钠含量

介绍了ZnS沉淀分离-EDTA络合滴定法测量工业硫化钠中Na2S含量的原理和方法，并对该方法的准确性和重现性进行了论证．实验结果表明：该方法具有良好的重现性，重复实验的相对标准偏差为0．55％；该方法具有较高的准确性，与碘量法（国标）相比结果相差0．11％，一致性达到99．5％．     

纳米Au膜在口腔呼吸检测器中的应用

以纳米Au膜材料为核心反应器,用硫化氢气体代替口腔呼吸气来检测巯基化合物的浓度变化,实验采用桥式电路,以复射式直流检流计作为测试手段,以电流显示读数。进而以不同的Au膜粗糙度和不同的Au膜厚度分别对硫化氢的浓度进行测试,同时,对比实验数据探索吸附规律。结果表明:在良好的控制条件下,气体体积分数与测试结果成线性关系。     

Sulfide assemblages in granulite xenoliths from Hannuoba Basalt, Hebei Province, China

Granulite xenoliths are important samples for understanding the forming and evolution of the crust. The granulite xenoliths enclosed in Cenozoic basalt of Hannuoba, Hebei Province, China, contain four types of sulfide assemblages: isolate rotundity enclosed sulfides, intergranular sulfides between minerals, secondary sulfide inclusions ranging in linear, and fissure-filling sulfides.Electron microprobe analysis shows that the components of sulfides are Ni-poor pyrrhotite with the molar ratios of (Ni Co Cu)/Fe less than 0.2. The molar ratios of (Fe Cu Co Ni)/S are less than 0.875 of normal pyrrhotite, and are less than those of mantle xenoliths, reflecting a sulfur-saturated environment. Pyrrhotite in various occurrences contains some Au and Ag, with the averages of 0.19wt%-0.22wt% Au and 0.01wt%-0.02wt% Ag, showing the gold mineralization related to the granulitization of low crust. Ni, Co and Cu have a normal correlation with S in pyrrhotite, indicating that heavy metal elements have a same source similar to sulfur because of the degasification of upper mantle.     

Bonding strength of graded anti-corrosive coatings of fluoroethylenepropylene （FEP）/polyphenylene sulfide （PPS）

Fluororesin-based anti-corrosive coatings including graded FEP/PPS were prepared on carbon steel by melt powder coating, the bonding strength of all coating systems was determined by the pull-off test. It is found that the poor adhesion of fluororesin coatings to metallic substrates is improved obviously by the graded coating structure of FEP/PPS, and the bonding strength reaches up to 11.8 MPa for the five-layer system. Examination by electron probe microanalysis （EPMA） verifies that the distribution of main components is graded in the five-layer system, which is responsible for the enhancement of the interfacial bonding.     

硫化镍精矿常压浸出研究

本文研究了温度、通氧速率、pH值、硫酸浓度等条件对硫化镍精矿常压浸出的影响,发现在80℃→85℃之间,镍浸出率随温度的升高而迅速增加,通氧条件下,镍浸出率差值的变化与通氧速率存在数学关系:y=8.271x0.3003,pH值为2.1~2.2时,镍浸出率最高,且镍浸出率随硫酸用量和铜离子的增加而升高。     

利用钛白粉废酸、二氧化锰矿和硫铁矿制取电解金属锰的研究与开发

采用钛白粉废酸、二氧化锰矿和硫铁矿浸出、除铁、硫化法除重金属及电解金属锰的工艺流程、技术条件与试验结果。取得了较好的技术指标以及质量达到YB／T051-2003高纯级DJMnA电解金属锰产品。     

A Thermodynamic Property Model for the Binary Mixture of Methane and Hydrogen Sulfide

A thermodynamic property model with new mixing rules using the Helmholtz free energy is presented for the binary mixture of methane and hydrogen sulfide based on experimental P_ρ T_x data, vapor–liquid equilibrium data, and critical-point properties. The binary mixture of methane and hydrogen sulfide shows vapor–liquid–liquid equilibria and a divergence of the critical curve. The model represents the existing experimental data accurately and describes the complicated behavior of the phase equilibria and the critical curve. The uncertainty in density calculations is estimated to be 2%. The uncertainty in vapor–liquid equilibrium calculations is 0.02 mole fraction in the liquid phase and 0.03 mole fraction in the vapor phase. The model also represents the critical points with an uncertainty of 2% in temperature and 3% in pressure. Graphical and statistical comparisons between experimental data and the available thermodynamic models are discussed