搜索结果: 1-9 共查到“石油与天然气工程 Solid”相关记录9条 . 查询时间(0.185 秒)
为了了解流体在球阀不同开度下的流动状态及对应的流阻系数，应用商业软件Solid Works Flow Simulation 对球阀不同开度的三维流场进行数值仿真模拟和可视化研究。模拟结果表明，在开度较小的情况下，阀芯横截面流速沿中心线呈对称分布，阀芯内部流场存在一对尺寸相等、方向相反的漩涡，且这对漩涡基本占据整个流道；同时出口管路也存在强烈的涡流，随着球阀开度的增大，流动达到稳定，漩涡消失。利用数...
Preparation of Proton Conductive Solid Acid Composites by Mechanical Milling
Mechanical milling Cesium hydrogen sulfate Phosphotungstic acid Proton conductivity Intermediate-temperature fuel cell
2010/9/8
New proton conductive solid acid composites were prepared by mechanical milling. First, the formation of highly proton conductive cesium-containing sulfate-phosphate double salt composites, and their ...
Development of Novel Proton Conductors Consisting of Solid Acid/pyrophosphate Composite for Intermediate-temperature Fuel Cells
Intermediate-temperature fuel cell Composite electrolyte Solid acid Pyrophosphate Composite effect
2010/9/8
Fuel cells are attractive energy conversion devices with high efficiencies and low emissions, and many studies have been conducted so far. Among them, fuel cells operating at 200-600°C are promising t...
Hydroconversion of Dimethylpentanes from Methylcyclohexane Using Two Consecutive Reactors Packed with Pt-modified Solid Acid Catalyst and Supported Ir Catalyst
Supported iridium catalyst Ring contraction Ring opening Clean gasoline Consecutive reactors
2010/9/8
Hydroconversion of methylcyclohexane was conducted over various noble metal-loaded catalysts at 493 K and atmospheric pressure. On the bases of the proposed reaction route and the rate of reaction ove...
Design of Solid Catalysts by Sol-gel Method Using Organic Polydentate Ligands and Their Catalytic Performance
Solid catalyst Catalyst design Sol-gel method Thermostable metal oxide
2009/8/4
Advantages and effectiveness of using an organic polydentate ligand in the sol-gel process were discussed. The sol-gel method using the ligand was presented herein for preparation of metal oxides inc...
Development of Biodiesel Production Technology from Waste Cooking Oil with Calcium Oxide as Solid Base Catalyst
Biodiesel Solid base catalyst Calcium oxide Waste cooking oil
2009/8/4
Waste cooking oils were investigated as the raw material for biodiesel production using calcium oxide as the solid base catalyst in refluxing methanol. Edible soybean oil and waste cooking oil from r...
Solid Base Catalysts: Generation, Characterization, and Catalytic Behavior of Basic Sites
Catalysis Solid base Reaction mechanism Organic synthesis
2009/7/24
Studies of solid base catalysis performed in our group are summarized. Strongly basic sites for most solid base catalysts are generated by removal of water and carbon dioxide by pretreatment at high...
Determination of chlorinated ethenes in water using headspace solid phase microcolumn extraction combined with thermal desorption in GC injection port
chlorinated ethenes vinyl chloride headspace solid phase microcolumn extraction thermal desorption
2010/8/11
A solvent-free sample preparation method is presented in which volatilized organic substances are extracted via solid phase microcolumn from an appropriate volume of headspace (tens of millilitres) wi...
Composition and properties of solid alkanes extracted from a waxy petroleum fluids
Crude oil long residue alkanes thermal properties urea adduction flow behaviour
2010/8/11
Assam crude oil long residue (370oC+) is highly waxy/aromatic in nature associated with high pour point (51oC). The solid alkane components of this fraction extracted through urea adduction were analy...