查询词典 catalyst

According to the invention, on the basis of regular wet process thiolaction, it adopts reformed generating oil as the sulfurized oil so as to avoid the extra high temperature in the early starting time, decrease the carbon deposition of the catalyst and increase the stability and activity of the catalyst.

按照本发明，在常规湿法硫化过程的基础上，选用重整生成油作为硫化油，可以避免开工初期温升过高，降低催化剂积炭量，使催化剂的活性稳定性明显提高。

Appropriate amount of Ni and Co promoters was favourable to the thiophene HDS activities of the supported WP catalysts.The supported WP catalyst showed a higher thiophene HDS activity than that of the sulfurized industrial catalyst at higher reaction temperature.

适量的助剂Ni 和Co有利于负载型磷化钨催化剂噻吩加氢脱硫活性的提高，其噻吩加氢脱硫高温活性优于硫化态工业催化剂。

A set of high pressure esterification reaction apparatus has been designed and established. By comparison of ten kinds of esterification catalyst, ammonium molybdate and sodium tungstate were chosen as properly catalyst of this reaction.

自行设计、安装了一套高压酯化反应装置，经比较、筛选十种酯化反应催化剂，确定钼酸铵、钨酸钠为该反应适宜的催化剂。

At the same time, with reference to the conditions of synthesis of methyl ester of salicylic acid, we combined ethyl ester of salicylic acid, salicylic acid-n-butyl, isobutyl salicylate, amyl salicylate, isoamyl salicylate and salicylic acid benzyl ester,besides, experimented the possibility for series of ester synthesis catalyst with Sodium bisulfate as a catalyst .

同时参照水杨酸甲酯的合成条件合成了水杨酸乙酯、水杨酸丁酯、水杨酸异丁酯、水杨酸戊酯、水杨酸异戊酯和水杨酸苄酯，实验了以硫酸氢钠为催化剂合成系列酯的可能性。

The properties are also studied, which testified that firm load technology for metallic substrate catalyst has a board foreground in automobile catalyst application.

研究证明本论文研究的以金属表面预处理为主体的涂层牢固负载技术，能够广泛应用于各种类型的机动车尾气催化净化剂中。

The results show that the reaction can be completed in shorter time and lower temperature while PEG is used as the phase transfer catalyst. The dropping point of product can reach about 165℃, this proves that the method of using PEG as phase transfer catalyst to produce rice bran wax calcium soap is effective.

试验结果表明采用PEG相转移催化制糠蜡钙皂可使反应在较短的时间和较低的温度下进行完全，并可使产品的主要指标滴点达到165℃左右，证明PEG相转移催化法是制糠蜡钙皂的有效方法。

Ferric nitrate and cupric nitrate can catalyze carbonization process. It is discovered that the catalyst dispersion on alkaline surface is poor through catalyst adsorption study.

对单元催化炭化过程的研究发现，铁、铜的硝酸盐对炭化过程有催化作用，能够减缓炭化过程中挥发份的最大析出速度，有利于各向同性炭前驱体的形成。

Anode catalyst, La0.75Sr0.25Cr0.5Fe0.5O3-δ, was synthesized to construct H2S fuel cell by urea combustion method. The catalyst LSCrF was selected to carry out the polarization test.

摘 要：采用尿素-硝酸盐燃烧法制备钙钛矿阳极催化剂La0.75Sr0.25Cr0.5Fe0.5O3-δ，并将其用于以H2S为燃料气的固体氧化物燃料电池中。

Jatropha Curcas oil was used as feedstock for producing biodiesel by transesterification,and adding sodium hydroxide,potassium hydroxide or sodium methoxide as catalyst respectively. The optimal conditions were obtained:molar ratio of methanol to oil 6∶1,reaction temperature 60 ℃,reaction time 80 min,mixing intensity 600 r/min,catalyst concentration for NaOH,KOH,or CH3ONa 1.2% of oil weight,The yield of biodiesel was above 97%. The physico-chemical indices of the biodiesel obtained met the quality standard ASTM of USA and DIN V of Germany.

选用了非食用油麻疯果油为原料，以氢氧化钠、氢氧化钾、甲醇钠为催化剂，通过酯交换法制取生物柴油，研究表明最适宜工艺条件为：醇油比6∶1，反应温度60 ℃，反应时间80 min，搅拌强度为600 r/min，催化剂用量为1.2%，转化率达到97%以上，且生物柴油各项理化指标均符合美国和德国测试标准。

In this paper, performances of diamond synthesized respectively with powder catalyst and with compact catalyst were compared.

比较了片状触媒和粉状触媒合成金刚石的性能，并从触媒材料的制备工艺及合成体系方面分析了造成性能差异的原因。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。