空速

The effect of deacidification was studied by the temperature, airspeed, alcohol-oil ratio and typies of the catalysts, and it taked experiments on regeneration, life and the renewable effect of deacidification of the catalyst.

本课题从温度、空速、醇油比、催化剂类型等方面对催化剂的脱酸效果作了研究，并对催化剂的再生，使用寿命，再生后的脱酸效果进行了实验。

The effects of reaction temperature, space velocity and the molar ratio of H2O2 to phenol on the concentration of diphenol product, the ratio of catechol to hydroquinone and reactive period of catalyst were investigated.

在连续全混反应器中，用含铁复合金属氧化物催化剂，研究了反应温度、空速、过氧化氢/苯酚对反应产物中苯二酚浓度、邻苯二酚/对苯二酚比例和催化剂的活性周期的影响。

The influences of the composition of the catalysts, reaction temperature, space velocity and mol ratio of benzene and dodecylene on the conversion of dodecylene and the selectivity were researched.

在微型液相固定床反应器上考察了反应漫度，空速，磷钨酸负载量以及苯烯摩尔比等反应条件对催化剂性能的影响。

It is found that conversion of furfuryl alcohol was higher than 99%,and THFA yield and selectivity achieved or were close to 97%by using catalyst Ⅱ with a small quantity of promoters.

对于含少量助剂的镍催化剂Ⅱ，在393 K、4.0 MPa和空速0.25 h\+\{-1\}时，糠醇转化率可达99%以上，四氢糠醇收率和选择性都达到或接近97%。

Secondly, the silver based catalysts modified by phosphorus, zirconium, zinc, potassium and so on using molecular sieve as carrier, which were produced by ion-exchange method, had also good catalytic performance for 1,2-propane glycol oxidation to methylglyoxal. The conversion of 1,2-propane glycol and the selectivity of methylglyoxal were both high, and the impurity such as formaldehyde and acetaldehyde in the product is little. At the condition of the temperature 300 ℃, the molar ratio of oxygen to 1,2-propane glycol 1.7:1, the space velocity 6000h~(-1), and the concentration of 1,2-propane glycol 70wt%, the conversion of 1,2-propane glycol is 90% and the selectivity of methylglyoxal is 45% on the Ag-P catalyst.

其次对采用离子交换法制备的负载在分子筛上的银系催化剂进行了研究，发现此催化剂在助催化剂磷、锆、锌、钾等的作用下对丙二醇的低温氧化脱氢具有很高的活性，可以得到较好的丙酮醛的收率，并且产物中的甲醛、乙醛副产物的量比较低；经过对Ag-P催化剂上反应条件的考察，发现当温度为300℃、氧醇比1.7：1、空速6000h~(-1)、丙二醇浓度为70wt%时，丙二醇的转化率为90%，丙酮醛的选择性为45%。

The researching content was as follows: 1. When AlClx/HY zeolite be used as catalyst, the effects of the ratio of 2-methylnaphthalene to tetramethyl benzene, catalyst concentration, reaction temperature and reaction time on the conversion (based on 2-methylnaphthalene), yield and selectivity (both based on 2,6-DMN) were discussed. In addition, by orthogonal experiment, the optimum reaction conditions were determined at the same time. The optimum reaction conditions : the molar ratio of 2-methylnaphthalene and tetramethyl benzene =1:1, reaction temperature was 400℃.

具体研究如下： 1、以AlClx/HY型分子筛为催化剂，研究原料配比(2-甲基萘与均四甲苯的摩尔比)、反应温度和反应时间对2-甲基萘的转化率、目的产物2，6-DMN的收率和选择性的影响，并通过正交实验确定了该催化剂体系下的最佳反应条件为：原料的摩尔比为(2-甲基萘：均四甲苯)=1：1，反应质量空速为6h-1，反应温度为400℃。

The reduction performance s of both unreduced ZA-5 and pre-reduced ZA-5H ammonia catalyst with large particle size as used in industry were measured by thermogravimetry (NET-ZSCH STA 449C).

采用热分析方法，研究了工业粒度ZA-5型氧化态和预还原态氨合成催化剂的还原性能，考察了还原温度、压力、空速、催化剂粒度、气体组成对还原速率和还原后催化剂活性的影响，提出了ZA-5催化剂的还原粒度效应及其工业还原过程中优化条件的基本原则。

After adsorbent was saturated by sulfur in adsorption, it can be regenerated with ultrasound, the optimum regeneration conditions are: methanol as regeneration agent, regeneration temperature 60℃ and LHSV of methanol 1.76h-1, methano dosage 100mL, amount of treated adsorbent 10g . Adsorbent was reused for three times, initial desulfurization efficiency is respectively 94.3%、94.3%、91.8%, the adsorbent has a good reappearance.

在超声波存在的条件下，以甲醇为再生剂，在再生温度为60℃、甲醇液态空速为1.76h-1、甲醇用量为100mL的实验条件下对10g动态吸附后饱和了的吸附剂进行再生，吸附剂经过三次再生后初始流出汽油的脱硫率分别达到94.3%、94.3%、91.8%，该吸附剂具有良好的再生性能。

For the coked 5A molecular sieve, using air as regeneration gas at a space velocity of 720h-1, a regeneration temperature of 350℃ and a regeneration time of 1h, the activity of the regenerated molecular sieve could reach 96% of that of the fresh one.

对于结焦5A分子筛，以空气为再生气体，在空速为720h-1、350℃条件下再生1h的吸附活性可以达到新鲜5A分子筛的96%左右。

He's having a hard time maintaining serious air speed.

他很难控制住重要的空速。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失