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calcination treatment
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  晶化处理
     The experiment results showed that calcination treatment had remarkable effects on the crystal structure and electrochemical performance of the samples.
     实验结果表明晶化处理对样品的物理性质和电化学性能有显著影响,并且发现经200℃晶化处理的样品具有最佳的电化学性能,在重负荷放电条件下,其放电比容量比商用MnO_2高出28.6%。
短句来源
     The experiment results showed that calcination treatment has remarkable effects on the crystal structure and electrochemical performance of the samples. The sample treated at 200℃ displayed the best electrochemical performance.
     研究结果表明晶化处理温度对样品的结构和电化学性能有较大影响,200℃晶化处理过的样品电化学性能最好。
短句来源
  “calcination treatment”译为未确定词的双语例句
     Ti-O-Si bonds formed. The addition of silica gel could effectively improve the thermal stability of TiO_2 and inhibit the transformation of anatase to rutile phase and the growth of titanium dioxide crystals during the calcination treatment.
     商业硅胶的加入使二氧化硅与二氧化钛之间发生强相互作用,形成Ti-O-Si键合,大大增加了样品的比表面积,并提高了TiO_2/SiO_2复合物的热稳定性,抑制了TiO_2晶粒生长以及锐钛矿相向金红石相之间的相转变,从而提高了纳米TiO_2/SiO_2复合氧化物的光催化活性。
短句来源
     LMH host layers can supply various cationic frameworks and have an absence of long-range cation ordering, they can be used as the precursors of ferrite spinels with better magnetism since they are often formed with mixtures of the same cations after calcination treatment.
     LMH的化学组成和结构在微观上具有可调控性和整体均匀性,煅烧后能够得到组成和结构均匀的尖晶石型铁氧体,具有优良的磁学性能。
短句来源
     (3) Silica-modified anatase TiO_2 nanoparticles were synthesized by a direct approach under conventional hydrothermal conditions using urea as template, followed by calcination treatment.
     (3)以尿素作模板剂合成的锐钛矿相纳米TiO_2/SiO_2复合氧化物在160℃水热处理时所得样品的比表面积并不大,光催化活性也不好; 而在100℃较温和的水热条件下合成的样品具有相对较大的比表面积,光催化活性也很高,此时尿素很好的发挥了模板剂的作用。
短句来源
     A simple calcination treatment produced the mesoporous silic a structure. An ultrasonic dispersion process was employed to immobilize grafted collagen chain in a three-dimensional mesoporous silica structure. The XRD patt ern showed the presence of a three-dimensional meso-structure with the a, b, and c parameters of 0.68, 0.37 and 1.64 nm.
     介孔二氧化硅-接枝胶原杂化材料通过超声分散接枝胶原与介孔二氧化硅的混合物制得,其三维结构用X射线衍射表征,晶格参数a,b和c分别为0.68,0.37和1.64nm,为正交晶型。
短句来源
     The nano-TiO_2 films on ceramic substrates can be obtained by spraying the nanometered TiO_2 colloids on a ceramic tile with a calcination treatment.
     将制得的纳米二氧化钛胶体喷涂于陶瓷表面,经焙烧处理得到陶瓷基纳米二氧化钛膜。
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  相似匹配句对
     L. P. treatment.
     L. P.
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     Medical Treatment
     健康不是医疗检查的标准——日野原重明的健康观
短句来源
     The ammonia treatment of Fe catalysts before calcination favors the methanation reaction.
     制备过程中的氨处理有利于催化剂活性的提高 ;
短句来源
     Transfer Process of Mercury during Calcination,and Study on the Treatment of Mercury-bearing Solid Waste
     含汞固废(危废)焙烧过程汞的迁移及治理技术研究
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     Calcination of soft kaolin
     云南软质高岭土煅烧增白研究
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  calcination treatment
It is more desirable that acid sites were generated directly by calcining the as-synthesized nanoparticles, making a subsequent ion-exchange and calcination treatment superfluous.
      
Compared with the undoped samples, the critical current density is four times higher if the doping compound is introduced prior to the calcination treatment, or two times higher if BaZrO3 is introduced prior to the sintering treatment.
      
Initially the spray-dried powders are amorphous and spherical in shape with a diameter of 6 μm and crystallize after calcination treatment at 950 °C.
      
Catalytic performance of the obtained Au/TiO2NFs is evaluated for low-temperature CO oxidation and photodegradation of methyl orange under UV illumination, and the relationship between the catalytic activity and calcination treatment is investigated.
      
It is desirable that, as this synthesis takes place in the absence of alkali cations, the mesoporous nano-particulate material is directly obtained in the acid form, making a subsequent ion-exchange and calcination treatment superfluous.
      
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HDZ zeolite(HZSM-5 type zeolite) synthesized in the absence of templates was provided by Nankai University. The effects of steam treatment and calcination at various temperatures on the activity and selectivity for conversion of n-heptane and propene on HDZ zeolite catalysts were studied.The experimental results show that with increasing the temperature of steam treatment or calcination the total surface acidity and number of strnog acid sites on the modified HDZ zeolite decreased. When the temperature of steam...

HDZ zeolite(HZSM-5 type zeolite) synthesized in the absence of templates was provided by Nankai University. The effects of steam treatment and calcination at various temperatures on the activity and selectivity for conversion of n-heptane and propene on HDZ zeolite catalysts were studied.The experimental results show that with increasing the temperature of steam treatment or calcination the total surface acidity and number of strnog acid sites on the modified HDZ zeolite decreased. When the temperature of steam treatment exceeds 500℃, XPS results reveal that part of the Al migrates to the outer layer from the bulk of the zeolite, so that the Si/Al ratio in the outer layer decreases, the micropore volume decreases and the channel size of modified zeolite contracts slightly. As a consequence, the catalytic activity of zeolite decreases apparently. It can be seen that with increasing treatment temperature, the concentration of aromatics and C_1-C_4 gaseous hydrocarbons diminishes and simultaneously increasee in C_5~+ aliphatics, that results in increasing the selectivity of gasoline. In the case of calcination treatment the selectivity of products is similar to that obtained with steam treatment.The deactivation of the HDZ zeolite catalyst during the conversion of n-heptane and its coking behavior after steam treatment have also been examined.

研究了正庚烷和丙烯在用水蒸汽和高温焙烧改性的直接法合成的HZSM-5型沸石催化剂上反应活性与产物选择性变化规律。结果表明,随水蒸汽处理和焙烧温度提高,沸石表面酸度和强酸中心数逐渐减少。在400℃以上水蒸汽处理或在650℃以上焙烧,沸石在脱羟基同时伴随骨架铝脱除,晶体孔容减少,孔口尺寸收缩。正庚浣和丙烯的反应活性随处理温度提高而降低,芳烃选择性下降,C_5~+脂肪烃含量增加,目的产物汽油收率提高;沸石形选性增加,p/o值急剧增大。两种不同方法改性的HDZ沸石反应活性和产物选择性有完全相似的变化规律。此外,考察了HDZ沸石失活特征和水蒸汽处理对结炭的影响。

n this paper, the catalytic performance of heteropoly acid (HPA)such as H3PMo12O40 (PMo12), H3PW12O40 (PW12) and H4SiW12O40 (SiW12)was studied by the etherification of diethylene glycol with ethanol. PW12and SiW12 revealed high activity for the etherification reaction, the conversion of diethylene glycol was 97.5% and 93.8%, respectively, theactivity of PMo12 was lower than PW12 and SiW12 and the conversion wasonly 45.3%. After calcination treatment at 350-500℃ for 3 h, the activity and selectivity for...

n this paper, the catalytic performance of heteropoly acid (HPA)such as H3PMo12O40 (PMo12), H3PW12O40 (PW12) and H4SiW12O40 (SiW12)was studied by the etherification of diethylene glycol with ethanol. PW12and SiW12 revealed high activity for the etherification reaction, the conversion of diethylene glycol was 97.5% and 93.8%, respectively, theactivity of PMo12 was lower than PW12 and SiW12 and the conversion wasonly 45.3%. After calcination treatment at 350-500℃ for 3 h, the activity and selectivity for diethylene glycol diethyl ether and diethyleneglycol monoethyl ether decreased with the increase of calcination temperature for all three HPA catalysts, but the selectivity for dioxane increased.

杂多酸对于二甘醇和乙醇的醚化反应的催化作用戚蕴石,刘俊峰,吴海霞,粟小(华东理工大学工业催化研究所,上海200237)关键词醚化反应,杂多酸,二甘醇二甘醇单(双)醚是一种具有广泛用途的重要溶剂,杂多酸(HPA)对醚化反应具有很好的催化活性.本文以HP...

Surface acidity,surface structure and catalytic activity of Fe_2O_3/ACDM zeolitecatalysts were studied using XRD,Py-IR,NH_3-TPD,Mossbauer-spectrum and MTOreaction. The results showed that calcination treatment didn’t influence the crystallinity ofHACDM zeolite,and impregnation treatment didn’t destroy the framework of the supporterzeolite. With increasing Fe content and higher calcination temperature,the following effectswere observed.(Ⅰ)Acidic sites and I_B/I_L value of zeolite surface decreased...

Surface acidity,surface structure and catalytic activity of Fe_2O_3/ACDM zeolitecatalysts were studied using XRD,Py-IR,NH_3-TPD,Mossbauer-spectrum and MTOreaction. The results showed that calcination treatment didn’t influence the crystallinity ofHACDM zeolite,and impregnation treatment didn’t destroy the framework of the supporterzeolite. With increasing Fe content and higher calcination temperature,the following effectswere observed.(Ⅰ)Acidic sites and I_B/I_L value of zeolite surface decreased as shown by NH_3-TPD.(Ⅱ)The conversion rate of methanol and selectivity to light-olefins also decreased,but both of them were higher than those on H-ACDM, Besides,the results of Mossbauerspectra showed that Fe_2O_3,took part in MTO reaction,and was partly reduced to FeO.

担载型Fe_2O_3/ACDM催化剂用于甲醇转化反应的研究夏清华,陈国权,王清遐,王公慰(中国科学院大连化学物理研究所大连116012)关键词ZSM-5沸石,铁浸渍改性,甲醇转化,低碳烯烃,酸性在煤基甲醇制低碳烯烃的MTO过程的研究中,通常是对ZSM...

 
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