hpw

Study on SiO_2 Aerogel Supported HPW Catalyst for THF Polymerization

SiO2气凝胶负载磷钨杂多酸催化THF聚合研究

When HPW loading was less than 35 % , HPW was finely dispersed on the support surface .

当负载量小于35%时，HPW在活性炭和硅胶载体表面呈高度分散。

NEW CATALYTIC MATERIALS AND CHEMICAL PROCESS INTENSIFICATION & Amorphous Alloy / MSB Reactor and HPW ( s ) Particulate / SCD Process

新催化材料和化工过程强化&非晶态合金/磁稳定床反应器和负载型杂多酸/悬浮床催化蒸馏

Fusel oil and acetic acid were used as raw materials in this experiment with heteropoly acid HPW / MxOy as catalyzer .

本实验以杂醇油和乙酸为原料，杂多酸HPW/MxOy为催化剂。

When the HPW loading was in the range of 20 % - 40 % , acidic unsaturated phosphotungstate was formed ;

中等负载量（20%～40%）时形成酸性较强的不饱和磷钨酸盐；

When the HPW loading was over 40 % , HPW crystal was formed on the surface of unsaturated phosphotungstate and covered some of the acid sites .

负载量大于40%时，在不饱和磷钨酸盐表面形成磷钨酸晶体。

Heteropoly acid , especially phosphorus tungsten acid ( HPW ), as a kind of catalyst , with no pollution , multifunction and high activity , has gradually shown a good prospect in organic synthesis and other fields .

杂多酸，尤其是磷钨酸，作为一种对环境无污染，多功能，高活性的催化剂，在有机合成，石油化工等行业中逐渐显示出较好的应用前景。

All the works of this paper include the design of rectangular dual ridged TEM horn antenna , improvement to a planar TEM horn , ultra-short pulse radiation experiment and analysis of key techniques of HPW UWB radar .

本文的主要工作包括超宽带天线的研制及改进，超宽带脉冲辐射实验，以及对高功率超宽带雷达关键技术的分析。

By the literature survey , the influencing factors on breakdown characteristic and the theoretical prediction of breakdown characteristic parame-ters in liquid dielectrics is presented in order to provide some useful reference for the miniaturized design of HPW sources .

通过文献调研，本文阐述了快脉冲下液体介质击穿特性影响因素及液体击穿特性参数的理论预测，其目的是为高功率脉冲源的小型化设计提供绝缘依据。

The experimental groups were irradiated with S wave band 20 mW / cm2 , HPW for 10 min , and 40 mW / cm2 HPW for 5 min and 10 min , separately .

以S波段平均功率密度分别为20mW/cm2的HPM辐照实验组大鼠10min，40mW/cm2辐照5min、10min。

In the defense industry , high power microwave weapons ( HPW ) can emit high-energy pulse , which has the characteristic of high power , narrow pulse and low duty cycle , by the antennas . Its high peaks will harm human and damage equipment seriously .

在国防高功率微波武器研究中，所产生的高能微波脉冲具有功率高，脉宽窄，占空比低等特点，由于其脉冲峰值很高，因此会对人体和设备造成严重危害。

Kaolin supported phospho-tungstic acid catalyst ( HPW / kaolin ) was prepared by impregnation method and characterized by XRD and NH3-TPD . The catalytic performance of HPW / kaolin catalyst for the alkylation of C9 mixed aromatics was investigated .

用浸渍法制备了磷钨酸／高岭土催化剂，用XRD、NH3-TPD等方法对其进行了表征，并考察其催化C9混合芳烃（C9）烷基化反应的性能。

12-Tungstophosphoric acid on active carbon ( HPW / C ) prepared by reflux adsorption was found to have a higher activity for dehydration of ethanol than γ - Al_2O_3 , and the ethylene yield was nearly 100 % in a wide range of temperature and space time .

用回流吸附法制备了负载型的12-钨磷酸（HPW/C）催化剂，研究了乙醇在HPW/C上脱水生成乙烯的催化活性。发现HPW/C具有比γ-Al2O3高得多的活性。

There were two different types of adsorption for C_2H_5OH on the HPW , HPW / C and HPW / SiO_2.For the supported HPW catalyst , at about 140 ℃ only physical adsorption took place , while at 215 ℃ chemical adsorption played an important role .

C2H5OH在HPW和负载HPW催化剂上都具有两个不同类型的吸附形态，对于负载型H3PW12O40催化剂而言，位于140℃左右的吸附态为物理吸附；位于215℃附近的为化学吸附。