共查询到20条相似文献,搜索用时 15 毫秒
1.
Yasuhiko Ito Hidetaka Hayashi Norio Hayafuji Shiro Yoshizawa 《Journal of Applied Electrochemistry》1985,15(5):671-674
An electrolytic calorimeter employing a heat flux transducer (HFT) has been developed. By means of this apparatus the single electrode Peltier heat for the anodic chlorine evolution reaction in the electrolysis of molten NaCl-ZnCl2 using a-alumina diaphragm was measured. The value of the single electrode Peltier heat obtained by such a method was 0.697 J C–1 at 377° C, which is very close to the value 0.614 J C–1 previously determined by a thermoelectric power measurement. The coincidence between the two methods indicates that a thermoelectric power measurement is quite valid for determining the single electrode Peltier heat. 相似文献
2.
3.
4.
5.
在离子膜法制碱过程中,盐水中的碘离子会在电解过程中被氧化成碘酸根或高碘酸根,与盐水中的钠离子、钡离子、钙离子、镁离子等形成碘酸盐沉淀或高碘酸盐沉淀,造成膜堵塞、膜使用寿命缩短、电解电流效率降低、电压升高等问题。本文采用溶胶凝胶法制备了有机胺类碘离子吸附剂,研究了动态吸附氯化钠中微量碘离子的去除性能和吸附柱循环再生性能,结果表明:吸附柱可将盐水中碘离子含量降至0.2mg/L以下,碘离子与氢离子物质的量比为1∶2、料液流速为6.4mL/(g·min)、碘离子含量为10mg/L时,采用0.01mol/L的Na2CO3洗脱再生循环5次,吸附剂处理盐水体积约在3.0~3.6L/g之间。同时,考察了盐水中共存离子对除碘性能的影响,结果表明:盐水中共存离子Br-、SO42-、Mg2+、Fe2+会使吸附柱可处理盐水体积降低,为保证吸附柱除碘效率,盐水除碘步骤应在精制除钙镁、除铁之后。 相似文献
6.
7.
8.
9.
10.
The electrochemical preparation of NaClO has been widely used for the production of industrial disinfectant. To reduce the cost of electrode preparation using the brushing method, this paper introduces a method for the electrodeposition for RuO2/Ti and RuO2‐IrO2/Ti preparation and NaCl solution electrolysis. The deposition of Ir improves the uniformity and stability of the RuO2/Ti electrode. The optimum preparation conditions and additive concentrations were investigated in detail through the orthogonal experiment. By adjusting the electroplating time, temperature and voltage, the electrode with a high content of available chlorine was synthesized successfully. The physicochemical properties of the as‐prepared RuO2/Ti and RuO2‐IrO2/Ti were determined by XRD, SEM‐EDS, and XPS, and the electrochemical performance and lifetime of the RuO2/Ti and RuO2‐IrO2/Ti was verified via an electrochemical workstation. Uniform and stable RuO2/TiO2 and RuO2‐IrO2/TiO2 were synthesized successfully for the electrolysis of the NaCl solution. 相似文献
11.
通过对电解反应释放余热的衡算,确定了合理利用余热能达到的最终用卤量;利用新型脱氯塔及配套的二次脱氯工艺,脱除淡盐水中多余的水分,实现全卤制碱;采用新的芒硝脱水法,解决了制约高芒卤水制碱的技术瓶颈。 相似文献
12.
Thomas Z. Fahidy 《Electrochimica acta》2006,51(17):3516-3520
Durbin-Watson statistics provide a means of determining whether adjacent/consecutive residuals related to a simple first-order regression are mutually interdependent, i.e. whether the postulated number of independent variables is sufficient for the sake of modeling. This paper shows three specific applications to linear models fitting electrochemical data. 相似文献
13.
Antonio Buffo Daniele L. Marchisio Marco Vanni Peter Renze 《Chemical Engineering Research and Design》2013
In this work the relationship between multiphase computational fluid dynamics models and population balance models is illustrated by deriving the main governing equations from the generalized population balance equation. The resulting set of equations, consisting of the well known two-fluid model coupled with a bivariate population balance model, is then implemented in the CFD code OpenFOAM. The implementation is used to simulate a particular multiphase problem: bubbly flow in a rectangular column. Results show that, although the different mesoscale models for drag force, coalescence, breakup and mass transfer, can be improved, the agreement with experiments is nevertheless good. Moreover, although the problem investigated is quite complex, as the evolution of bubbles is solved in real-space, time and phase-space (i.e. bubble size and composition) the resulting computational costs are reasonable. This is due to the fact that the bivariate population balance model is solved here with the so-called conditional quadrature method of moments, that very efficiently deals with these problems. The overall approach is demonstrated to be efficient and robust and is therefore suitable for the simulation of many polydisperse multiphase flows. 相似文献
14.
通过热量交换和换热面积的计算.说明了通过加热过滤盐水来回收湿氯气或脱氯淡盐水的低位热能是可行的。同峙指出了这2种低位热能回收利用的优、缺点。指出了离子膜电解槽生产的湿氯气在进行热量交换计算时,与隔膜法电解产生的湿氯气的区别是要分为显热段和潜热段来进行计算。 相似文献
15.
16.
电解氯化钠制氯酸钠的过程会产生歧化反应热,歧化反应热的多少关系到移走这部分热量的换热器设计和这部分热能的开发利用价值.但由于氯酸钠电化生产过程能量衡算复杂(既有电功、又有化学反应热效应、相变热),一般化工设计类书籍中,很难找到这类反应的能量衡算方法.对氯酸钠电解歧化反应热的理论计算和实际测算方法进行了探讨,给出了合理、简便的理论计算和实际测算方法.并且两种方法计算结果相差较小.然后利用已有的实际生产数据进行了佐证,最后综合计算结果和已有生产数据,得出电解电能30%~35%转化为可利用的歧化反应热,以氯酸钠产量计歧化反应热为5.55×106~6.34×106 kJ/t的结论.数据可靠性满足设计开发者使用. 相似文献
17.
18.
内电解法处理印染废水的效果研究与分析 总被引:14,自引:0,他引:14
印染废水成分复杂、色度高、CODCr高且难降解,对环境造成较大污染。印染废水处理一般采用生化一混凝沉淀法、混凝气浮法、化学氧化及活性炭吸附法等,但这些方法存在运行费用较高、不易管理等缺点。内电解的基本原理是利用铁屑中的铁和炭组分构成微小原电池的正极和负极,以充入的废水为电解质溶液,发生氧化-还原反应,形成原电池。利用内电解对印染废水进行预处理,脱色率可达75%。90%,CODCr去除率达55%左右。另外还可提高废水的可生化性,废水的BOD5/CODCr值从原来的0.23提高到0.57,为后续生化处理和处理后达标排放奠定了基础,且运行成本低,易于管理。 相似文献
19.
A. A. Wragg 《Journal of Applied Electrochemistry》1991,21(12):1047-1057
This paper is specifically concerned with the application of the electrochemical limiting current technique to the study of mass transfer and heat transfer by natural convection. A variety of geometrics are considered including upward facing discs, inclined plates, cones, cylinders, cuboids and cavities. The case of natural convection due to simultaneous concentration and thermal effects is also considered. A particular feature of the work described is the use of Schlieren photography to obtain flow pattern information. This allows the mass/heat transfer behaviour to be better understood in the light of hydrodynamic observations.This paper was presented at the Workshop on Electrodiffusion Flow Diagnostics, CHISA, Prague, August 1990. 相似文献
20.
In this work a comparison has been made between a localized (micro scale) and a conventional (large-scale) corrosion study of 304L stainless steel in a sodium chloride solution using Tafel plots and electrochemical impedance spectra. Results show the high ability of microelectrochemical techniques for the local investigation of corrosion procedures on solid surfaces, something which is not feasible with conventional large-scale techniques. In the second experiment the microelectrochemical behavior of a faulty copper layer on 304L stainless steel was investigated using linear sweep voltammetry. Glass capillaries touching only small areas of the surface were used and the copper coated surface of the steel sample was scanned in a 9 by 6 matrix (54 measurements) while acquiring data. The obtained corrosion potentials for both defect and intact areas were used to map the surface. The surface plot shows the exact position of the defect point in the coating layer. 相似文献