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In contrast, the sulfated content of the catalyst was 1.45% after 24 h digestion refluxing.

而经水热回流处理24h制备的催化剂样品硫质量分数为1.45%,在正丁烷异构化反应中显示出优异的催化性能,250℃下的稳态转化率大于46%,接近该条件的平衡转化率。

Although CdS and NiSe belonged to the same crystal system, they had a great difference in the morphology of products produced in ethylenediamine by a solvothermal process. By making a crytallographic comparison between CdS and NiSe, I thought that fourcoordinated crystals were more prone to grow one-dimensionally in the stacking direction of tetrahedrons. This hypothesis could also be embodied in many examples.

硫化镉和硒化镍的晶体结构都为六方晶系,但在以乙二胺为溶剂的溶剂热条件下合成出的产物形貌有很大的差别,我们通过对两类晶体结构的结晶学比较,我们认为4配位的晶体更趋向于生成一维纳米材料,并提出生长方向即为四面体堆积方向,这一假设也能得到许多例子的证实。

The iron isotopic composition lightly from hydrothermal fluid upwelled into ocean, BIFs are enriched in heavy isotopes of Fe by partial oxidation and precipitation, and iron isotopic composition was homogenous and reequilibrium during different minerals by metamorphism.

提出了地球早期海洋中Fe的循环模式:洋中脊喷发富集Fe轻同位素的二价铁热液流体,流体进入海洋后经过部分氧化和沉淀的过程使得BIF富集Fe的重同位素,后期的变质作用使得不同矿物间发生了Fe的均一化及再平衡

But there isn't a open and general program which can systematically compute heat transfer and wall temperature of vectored nozzles cooled with varied film models to date, not to say spectral properties.

但目前国际上尚无一套公开的、通用化的计算程序可以系统地计算各种形状的矢量喷管在采用不同气膜冷却方式下的换热及温度分布,并能分光谱计算喷管的红外辐射特性。

The influence of the vermiculating rate on the thermal fatigue resistance.

聂晓霖,马鸣图,蠕化率对蠕铁热疲劳抗力的影响

A new preparation method for antimony stearate by antimonous oxide, acetic anhydride and stearic acid was studied.

硬脂酸锑作为一种分子筛催化剂中有毒物质的钝化剂和一种新型的热稳定剂,可用于石油催化裂化、塑料、橡胶工业[1~3]。

The effect of reaction temperature, time, water volume, oxidant, acetic acid, ethanol, and sodium carbonate on the yield of reducing sugar were investigated.

在亚临界水的状态下对稻壳和麦麸进行水热糖化实验,考察了反应温度、反应时间、加入水的体积以及氧化剂、醋酸、乙醇、碳酸钠等对还原糖产率的影响。

Its stability was investigated after calcination and after separate treatments in boiling acid, base and different ammonium salt solutions for 6h.

采用三段晶化法合成了MCM-22分子筛,研究了MCM-22分子筛的热稳定性,分别用盐酸、NaOH和铵盐溶液在沸腾条件下处理MCM-22分子筛6h,考察MCM-22分子筛对酸、碱、铵盐的稳定性。

Highly stabilized mesoporous molecular sieves were synthesized by the hydrothermal method using natural clay and sodium silicate as raw materials and cetyltrimethyl ammonium bromide as a template.

以天然黏土和硅酸钠为原料、十六烷基三甲基溴化铵为模板剂,水热法合成了有序性好的高稳定性介孔分子筛。

Co-firing characteristics of corn stalk and stone coal in different proportion were investigated by thermal gravimetric analysis. The results showed that corn stalk can improve the ignition and combustion of stone coal. The agglomeration experiments on corn stalk were made in a bench-scale bubbling fluidized bed with quartz sand as bed material and stone coal ash as additive. The results indicate that stone coal ash can inhibit agglomeration of bed material particles at temperature of 900℃. Agglomerate of blends was analyzed by means of scanning electron microscopy, energy-dispersive X-ray, and the bed materials were analyzed by means of X-ray fluorescence. Analysis showed that aluminum element and iron element in stone coal ash can react with alkali compounds and eutectics with low melting point, form a covering layer with high melting point on the surface of biomass and quart sand particles, thus inhibit the forming and transfer of low melting compounds.

以玉米秸秆与石煤按不同比例组成的混合物为研究对象,在TG-DTG热分析仪上进行了燃烧特性分析,结果表明玉米秸秆有利于石煤的着火和稳定燃烧,对石煤有一定的助燃作用;在小型鼓泡流化床实验装置上,以石英砂为床料、石煤灰为添加剂,进行了玉米秸秆成型燃料流化床燃烧的床料黏结实验,结果表明:石煤灰能够在生物质流态化燃烧过程中有效地抑制流化床床料黏结现象的发生;通过对实验中形成的结团进行扫描电子显微镜X射线能谱(scanning electron microscopy/Energy-dispersive X-ray- SEM/EDX),对床料进行X射线荧光光谱(X-ray fluorescence,XRF)分析,结果表明石煤灰中的Al和Fe能够与生物质灰中的碱金属化合物以及低熔点共熔物发生化学反应生成高熔点物质,并且覆盖在生物质碳颗粒与石英砂颗粒表面形成隔绝层,从而阻止低熔点物质的生成与迁移。

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The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作:对伸臂位于顶部的单层框架—筒体模型进行分析,提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。

Its advantage is that it can be used in smaller units.

其优点在于可以在较小的单位中应用。