搜索结果: 1-11 共查到“工学 urea”相关记录11条 . 查询时间(0.039 秒)
A facile strategy to construct multifunctional microencapsulated urea ammonium polyphosphate for epoxy resins towards satisfied fire safety, thermal stability and compatibility
epoxy resin fire safety mechanical properties microencapsulation urea ammonium polyphosphate
2023/11/16
Enhancing the fire safety of epoxy resin (EP) concomitant with less mechanical performance degradation is still a challenge for traditional flame retardants. Hence, polypyrrole (PPy) was used as a fil...
Concentration of Omega-3 Polyunsaturated Fatty Acids from Rana Egg Oil by Urea Complexation and Response Surface Methodology
Omega-3 Polyunsaturated Fatty Acids Oil
2016/6/2
The optimum enrichment parameters of main omega-3 polyunsaturated fatty acids (ω-3 PUFAs) from Rana egg oil were investigated. Firstly, it was optimized the saponification condition. Secondly, the PUF...
柴油机Urea-SCR控制系统设计与试验
重型柴油机 SCR系统 控制策略 标定
2016/12/19
SCR后处理技术是目前降低柴油机NO x 排放量的主流技术，首先基于自主开发的SCR控制系统，阐述了系统的组成、工作及反应原理。其次通过协调控制策略以确保系统内部各模块运转正常，通过原机排放模型和化学反应动力学模型作为前馈控制得到尿素基本供给量，通过排温修正模型进行瞬态排温修正，利用发动机排温和储氨量的对应关系对氨泄漏进行有效控制，根据OBD法规要求当发动机NO x 排放量超标时进行报错。最后对系...
Removal of Nitrogen Dioxide and Sulfur Dioxide from Air Streams by Absorption in Urea Solution
Sulfur Dioxide Removal Nitrogen Dioxide Removal Column Absorption Removal of Acid Gases Air Pollution Prevention
2013/3/12
The study focuses on the absorption rates of NO2, SO2 and a mixture of these two acid gases into urea solution in packed bed column. The absorption rate was studied as a function of absorbent temperat...
Characterization of the Mechanical Properties of Urea-Formaldehyde Microcapsules
urea-formaldehyde microcapsule micromanipulation technique mechanical properties
2009/11/16
The mechanical properties of urea-formaldehyde (U-F) microcapsules were determined using a micromanipulation technique and a theoretical model. Loading-unloading, compressing and holding, and compress...
Chemical Fixation of Carbon Dioxide: Synthesis of Cyclic Carbonate, Dimethyl Carbonate, Cyclic Urea and Cyclic Urethane
Carbon dioxide Chemical fixation Heterocyclic compound Cycloaddition
2009/7/27
Chemical fixation of carbon dioxide (CO2) may be very important in the future as a solution for the problem of increased atmospheric CO2 levels. Recent developments for chemical fixation of CO2 to cy...
Structure and Properties of Segmented Polyurethane-Urea Elastomers with Binary Hard Segment Component Which is Exhibited by Chain Extender
Segmented polyurethane-urea Mooney-Rivlin plot Hydrogen bond
2009/4/29
Segmented polyurethane-urea (SPUU) is a block copolymer which consists of hard and soft segments. SPUU films with different ratios of ethylenediamine (EDA) and propylenediamine (PDA) as chain extend...
IDHA Concentration and Purification from the Marine Heterotrophic Microalga Crypthecodinium cohnii CCMP 316 by Winterization and Urea Complexation
DHA PUFAs Crypthecodinium cohnii winterization
2009/3/4
A simple and inexpensive procedure involving saponification and methylation in wet biomass, winterization and urea complexation in a sequential way has been developed in order to concentrate docosahex...
Use of Nitrogen from Ammoniated Alfalfa Hay, Urea, Soybean Meal, and Animal Protein Meal by Lactating Cows
ammoniation alfalfa ruminally degradable protein
2008/6/24
Midbloom alfalfa hay was baled (16% moisture) and treated with approximately 2% anhydrous NH3 (percentage of DM). Concentrations (percentage of DM) of total N (4.7% vs. 3.4%), NPN (1.3% vs. 0.4%), sol...
期刊信息
篇名
Urea-based Hydrothermally-derived Homogenous Nanostructured Ce1-xZrxO2 (x = 0 ( 0.8) Solid Solutions: A Strong Correlation Between Oxygen Storage Capacity and Lattice Strain
语种
英文
撰写或编译
撰写
作者
...
期刊信息
篇名
Grain Size-Dependent Electrical Conductivity in Scandia-Stabilized ZirconiaPrepared by A Mild Urea-Based Hydrothermal Method
语种
英文
撰写或编译
撰写
作者
Gang Xu,Ya-Wen Zhang*,Chun-Sheng Liao,Chun-Hua Ya...