催化裂化干气烃化制二乙苯

在装有100 mL LaZSM5-Al-Mg催化剂的固定床反应器内进行了质量分数为68.5％的苯和质量分数为18.9％的乙苯混合原料与催化裂化干气制二乙苯反应，在反应温度340 ℃、反应压力0.7 MPa、乙苯空速7 h^-1和n(乙苯)∶n(乙烯)=4.5∶1的反应条件下，乙苯不转化，只消耗苯，乙烯转化率在90%左右，对二乙苯选择性和收率分别为85％和75％左右，无邻位二乙苯生成。同时考察了催化剂的运行寿命。     

树脂催化重汽油烷基化硫转移的动力学研究

采用树脂催化剂,研究重汽油中噻吩类硫化物的烷基化硫转移性能,分析反应前后硫分布的变化,并对反应动力学进行研究。结果表明,在反应温度110℃和反应时间60 min条件下,烷基化硫转移率大于90%,其反应动力学为一级反应速率方程,反应活化能为20.32 kJ·mol~(-1),指前因子为1 364 h~(-1),噻吩类硫化物烷基化反应的动力学方程可表示为:r=1364exp(-2.445×10~3/T)c_T。     

预处理+双膜工艺用于炼油废水深度处理

为了降低企业生产过程中新鲜水消耗量,目前各炼化企业将达标污水作为原水进行深度处理后回用。介绍了庆阳石化300×10~4t/a新厂污水深度处理回用装置预处理+双膜工艺的原理、工艺路线、主要工艺单元以及运行中存在的问题和解决方法。     

CNPC’s Future ExplorationTargets for Giant Gas Fields

Potential exploration targets for giant gas fields Based on the distribution of remaining gas resources,the exploration targets selection as well as an analysis of controlling factors for giant gas reservoirs     

旋转补偿器在大容量燃煤锅炉配套注汽管道上的应用

国内油田注汽管道热补偿通常采用Π形补偿器,但其会大大增加管道长度,且转弯数量多、局部阻力损失大,为满足生产需求,选用新型旋转补偿器进行了应用研究。介绍了旋转补偿器的原理以及两种典型的布置形式。通过大容量燃煤锅炉配套注汽管道上的应用实例,对其热补偿距离、补偿器尺寸、曲折角度、管托的设置进行了计算和说明。应用结果表明旋转式补偿器在注汽管道上应用优势明显,与Π形补偿器相比,降低了压力损失和热损失,有利于系统安全,具有推广应用价值。最后对工程设计及施工提出了建议。     

油品移动自动化解决方案

目前,罐区的硬件设施达到了相当高的水平,但在罐区管理方面还存在一定的不足。而对于现代化的油库,不仅要有先进的设备,更要有先进的管理思想和方法。本文提出了油品移动自动化解决方案。该方案集成库存监视、移动监视、控制、执行和跟踪于一体,目的是提高油品移动的可靠性、安全性及效率。对于复杂罐区特别是炼油厂的罐区管理具有十分高的应用价值。     

二氧化硅负载Cr(acac)3/PNP催化剂的制备及其催化乙烯四聚反应性能研究

Chromium acetylacetonate and bis(diphenylphosphino)isopropylamine were coordinated in situ and supported on methylaluminoxane-modified silica. The catalyst structure and effects of reaction temperature, reaction pressure and Al/Cr molar ratio on ethylene tetramerization were investigated in detail. Chromium was uniformly and firmly immobilized on the support and could not be leached off by methylaluminoxane. The supported catalyst, upon being activated with methylaluminoxane, exhibited catalytic activity of 1.70×107 g/(mol Cr·h) for ethylene tetramerization to form 1-octene at a reaction temperatures of 80 ℃, a pressure of 2.0 MPa and an Al/Cr molar ratio of 300. The supported catalyst presented a good tolerance to high temperature.     

Increase in thermoelectric power factor of carbon-nanotube films after addition of polystyrene

We report the enhancement of the thermoelectric power factors of single-walled carbon-nanotube (SWCNT) films caused by the addition of polystyrene to the films as a binder. The Seebeck coefficient of the SWCNT films was increased by addition of polystyrene. On the other hand, the electrical conductivity gradually decreased with increasing amount of polystyrene. The power factor was maximum for a polystyrene concentration of 20 wt%; it was approximately 1.7 times higher than that of a pure SWCNT film. These results indicate that polystyrene is a superior binder polymer for synthesizing CNT/polymer thermoelectric composites.     

Macaroon-like FeCo2O4 modified activated carbon anode for enhancing power generation in direct glucose fuel cell

Macaroon-like FeCo₂O₄ nanomaterial was prepared and used as electrocatalyst in direct glucose alkaline fuel cell (DGAFC), which exhibited high catalytic activity towards glucose oxidation reaction. Maximum power density of 35.91 W m⁻² was achieved in the DGAFC equipped with a FeCo₂O₄ modified activated carbon (AC) anode, which was almost 151% higher than the control. Physical and electrochemical characterizations were performed to provide further understanding of the origin of its high activity. Our results show that the introduction of FeCo₂O₄ into the AC anode remarkably increase the exchange current density and reduce the charge transfer resistance. It is supposed that there is a synergistic effect between Fe (III) and Co (III), which accelerates electron transfer from glucose to external circuits. This study will promote the development of cost effective and environmentally benign catalysts for electrochemical energy applications.     

A dual-porosity dual-permeability model for acid gas injection process evaluation in hydrogen-carbonate reservoirs

The Pre-Caspian basin is one of the most prolific in terms of oil and gas exploration and hydrogen and carbon compounds energy production around the world. The major hydrogen and carbon compounds reservoirs are Carboniferous reef and platform hydrogen-carbonate rocks. The original fluids under subsurface conditions contain 15% hydrogen sulfide and 4% carbon dioxide. Acid hydrogen and carbon compounds reinjection is not only an environmentally friendly solution for disposal of produced greenhouse gases but also enhances oil recovery and supplies more fuel energy. On the other hand, the presence of fractures makes hydrogen-carbonate reservoir characteristics nature more complicated than conventional sandstone reservoirs, which leads to a tremendous challenge to evaluate the gas injection process. In this work, a dual-porosity dual-permeability formulation was used to model the dual-medium nature incorporating matrix system with high porosity and low permeability and fracture network with low porosity and high permeability. After matching PVT experiments, a ten pseudo-components fluid model was generated for running compositional simulation. The miscible hydrogen and carbon compounds injection was simulated as an effective enhanced oil recovery approach. Sensitivity analysis such as timing of injection gas, injection rate, well spacing and completion interval have proposed the optimal condition for the miscible hydrogen and carbon compounds flooding. The recommended optimum hydrogen and carbon compounds injection scenario is twice higher oil recovery compared with natural depletion. The results of this study illustrate further the practicability of pseudo-components splitting and lumping for compositional simulation to evaluate the performance of hydrogen and carbon compounds injection processes, and are of great importance using the dual-porosity dual-permeability method performing numerical simulation of naturally fractured hydrogen-carbonate reservoirs.