水煤焦浆的成浆性能研究

笔者选择萘系表面活性剂作为分散剂,考察了水、煤、石油焦的成浆性能,研制一种新型环保石油替代燃料——水煤焦浆。实验结果表明添加适量的磺酸盐类分散剂和无机盐稳定剂后,水、煤、石油焦呈现较好的成浆性能,可替代传统的水煤浆和水焦浆。实验还研究了煤焦配比、稳定剂、温度等对水煤焦浆的成浆性能的影响。     

发展中的越南石油工业

2009年10月18日,CCOP第46届年会在越南头顿(VUNG TAU)召开。会议期间,主办国越南向CCOP成员国展示了前所未有的热情和活力,也使各国参会代表充分了解了不一样的越南和发展中的越南石油工业。近年来,越南的石油工业发展迅速,国际合作项目也接踵而至,在东南亚的发展速度中名列前茅。伴随着越南与我国双方领海争议,越南正日益成为我国在东南亚市场的潜在竞争对手。     

A Correlation for Prediction of the Required Minimum External Surface Area of Gas Cartridge Filters in the Petroleum Industry

Abstract

A correlation has been derived from analytical solution of mass and momentum balance equations for accurate and rapid estimation of the required minimum external surface area of gas cartridge filters in the petroleum industry. The proposed correlation is especially important for preliminary design of these units regarding gas injection projects and underground storage of natural gas. High replacement costs associated with gas cartridge filters and numerous applications of these units are the most important justifications of the present work. Predicted results and fabricator's recommended data regarding the required minimum external surface area of gas cartridge filters are in good agreement with an average absolute deviation (AAD) of 2.4%.     

Deep desulfurization of diesel via peroxide oxidation using phosphotungstic acid as phase transfer catalyst

High sulfur level in diesel fuel has been identified as a major contributor to air pollutant in term of sulfur dioxide (SO_x) through diesel fueled vehicles. The main aim of the present work is to develop a promising methodology for ultra deep desulfurization of diesel fuel using oxidation followed by phase transfer of oxidized sulfur. Experiments were carried out in a batch reactor using n-decane as the model diesel compound and also using commercial diesel feedstock. To remove sulfur tetraoctylammonium bromide, phosphotungstic acid, and hydrogen peroxide were used as phase transfer agent, catalyst and oxidant respectively. The percent sulfur removal increases with increasing the initial concentration of sulfur in fuel and with increasing the reaction temperature. Similar trends were observed when commercial diesel was used to carry out desulfurization studies. The amphiphilic catalyst serves as a catalyst and also as an emulsifying agent to stabilize the emulsion droplets. The effects of temperature, agitation speed, quantity of catalyst and the phase transfer agent were studied to estimate the optimal conditions for the reactions. The sulfur removal from a commercial diesel by phase transfer catalysis has been found effective and removal efficiency was more than 98%. Kinetic experiments carried out for the desulfurization revealed that the sulfur removal results are best fitted to a pseudo first order kinetics and the apparent activation energy of desulfurization was 30.6 kJ/mol.     

吨焦耗煤指标的影响因素分析

吨焦耗煤指标的主要影响因素有配煤挥发分、焦炭挥发分、焦炭烧损率、焦灰产量、进厂煤水分化验、焦炭称量等,分析表明,因计算基础不同,各企业间的吨焦耗煤指标缺少比较的统一性。济钢焦化厂在焦炭全干熄和干熄焦灰不计入焦炭产量的前提条件下,经推算,吨焦耗煤指标值在1.375t左右。     

Synthesis and characterization of geopolymers containing blends of unprocessed steel slag and metakaolin: The role of slag particle size

The present research deals with the production and characterization of geopolymers prepared by mixing metakaolin with a steel slag from the production of chromium-manganese steel, a commercial sodium silicate solution and a sodium hydroxide solution. Different specimens were prepared by mixing metakaolin with different proportions of steel slag (20, 40, 60, 80 wt%) characterized by different maximum particle size. Specimens containing just metakaolin and steel slag alone were also prepared for comparison. All specimens have been characterized regarding their compressive strength, specific surface area, water absorption and microstructure. It has been observed that the use of fine steel slag powders leads to increases the performances and that the specimens containing 40 wt% steel slag and 60 wt% metakaolin revealed the best overall behaviour.     

瓦斯脱油脱水系统腐蚀分析

根据炼油厂瓦斯脱油脱水系统被腐蚀的情况,指出H2SxO6、H2S、CO2、HCl等的存在是引起腐蚀的主要原因.大庆炼油厂采取玻璃鳞片涂料、脱硫脱水处理以及停工期间用氮气封闭等防护措施后,该系统已取得安全运行1290天的良好成绩.     

800 XA 在高钛渣炉过程自动化中的应用

结合高钛渣直流电弧炉生产工艺的特殊需求与ABB-800 XA系统的鲜明特点，阐述了采用后者对生产过程自动化进行优化设计与配置的运用实践，从而实现了对高钛渣直流电弧炉工艺过程的优化控制。     

Removal of high concentrations of H2S from simulated natural gas by Acidithiobacillus ferrooxidans immobilized on polyurethane foam

A chemo‐biochemical process for desulfurization of simulated natural gas containing hydrogen sulfide (H₂S) was investigated. The results showed that using polyurethane foam as a support for immobilization of Acidithiobacillus ferrooxidans obtained good biological oxidation performance and the maximum oxidation rate of ferrous iron was 4.12 kg m^?3 h^?1. Moreover, a semi‐empirical formula was set up for calculating theoretical ferrous oxidation rate as a function of influent Fe²⁺ and Fe²⁺ concentration in the bioreactor. The integrated chemical and biological process achieved removal efficiencies of about 80% when treating high concentrations of H₂S (15 000 ± 100 ppmv). © 2012 Society of Chemical Industry