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Three approaches are investigated to prepare carbon-based Pt nano-catalyst. Size of Pt nanoparticles made from the macerating and microemulsion integraled method are comparatively small, about 7nm.

采用三种路线研制了碳基铂纳米催化剂,其中结合浸渍法与微乳液制备纳米粒子的方法,即活性炭附载微乳液体系中制备的Pt纳米粒子,制得的催化剂中的Pt纳米粒子较小,约7nm左右。

Activated carbon with more developed porous structure was prepared.

分析了活性炭孔结构、表面性质以及其他因素对吸附过程的影响,建立材料的结构、性质与其使用性能的关系,揭示吸附机理。

In order to reduce mercury pollution in the succeeding gold stripping,electrowinning,retorting and regeneration of the mercury-laden AC steps,the leachate is demercurated previously,i.

为消除后续解吸、电解、冶炼以及活性炭再生过程中的汞污染问题,拟对堆浸富液进行除汞预处理,即采用沉淀-絮凝法选择性去除富液中的汞杂质。

In the reaction process of synthesizing vinyl acetate,the loss of the active species Zn2 from the surface of activated carbon results from Zn2 sublimating of gas phase and the blocking inside micropores with condensation products.

乙炔和醋酸合成醋酸乙烯的反应过程中,催化剂的失活,是由催化剂中的醋酸锌Zn2从活性炭表面上升华到气相中以及被凝聚物堵在微孔内部而引起的。

When oxygen is absent, the heat treatment has a negative effect on the activity of the carbon, and the deeper heat treatment results in the lower activity, which is directly relevant to the decrease of the amount of C-OH which plays an important role in the reduction of NO with carbon.

在无氧条件下,活性炭热处理降低了其还原NO的反应活性,且其反应活性随着热处理程度的加深而降低,这与炭表面C-OH数量的减少有直接关系,C-OH在C-NO反应中扮演了重要角色。

The gas diffusion electrode was prepared with active carbon and acetylene black(9:1 by weight).

以质量比9:1的活性炭和乙炔黑制备气体扩散电极,着重研究电流密度、pH值、曝气量等因素对H2O2产生量的影响。

On the basis of powder contact angle measurement,the surface free energy of active carbon and acetylene black before and after oxidized by nitric acid or reduced by hydrazine was estimated by means of Wu formula.

在粉末接触角测试的基础上,用Wu方程估算了硝酸氧化或肼还原前后,活性炭和乙炔黑的表面自由能。

The TiO2 thin film was deposited on the active carbon.The photo-catalytic degradation of acid violet red under the UV-ray was studied.

用常压化学气相沉积法在活性炭上镀二氧化钛薄膜,通过紫外光照射对酸性品红进行降解研究。

The effect of impurities in DMDAAC monomer solution, such as NaCl, allyl chloride, allyl alcohol, allyl aldehyde, active carbon, low molecular polymer of DMDAAC, yellow residua, Fe~(3+), Fe~(2+), Cu~(2+), on the polymerization reactivity of preparing PDA with 30%cationicty was researched in this paper.

本文研究了二甲基二烯丙基氯化铵单体溶液中氯化钠、烯丙基氯、烯丙醇、烯丙醛、活性炭、低分子聚合物、黄色物质、Fe~(3+)、Fe~(2+)、Cu~(2+)等杂质对合成阳离子度为30%PDA的聚合反应性能的影响。

The polymerization of preparing PDA could be impacted by allyl chloride, allyl alcohol and allyl aldehyde. The content of allyl chloride, allyl alcohol and allyl aldehyde in the DMDAAC monomer solution varied from 0mg/kg to 1000mg/kg, their intrinsic viscosity of PDA descended from 10.3dL/g to 8.0dL/g, 6.8dL/g and 8.8dL/g respectively. The polymerization of preparing PDA could be carried out well in the case the content of NaCl, active carbon, yellow residua and low molecular polymer of DMDAAC were less than 10000mg/kg, 1000mg/kg, 1000mg/kg and 50000mg/kg respectively.

单一杂质含量变化对聚合产物PDA特征粘度影响的研究结果表明:在DMDAAC单体溶液聚合反应过程中,当Fe~(3+)、Fe~(2+)和Cu~(2+)含量分别达到7mg/kg、9mg/kg和5mg/kg时无法得到聚合产物PDA胶体;当烯丙基氯、烯丙醇、烯丙醛含量分别从0mg/kg增加到1000mg/kg时,聚合产物PDA的特征粘度从10.3dL/g分别下降到8.0dL/g,6.8dL/g和8.8dL/g;活性炭和黄色物质含量在1000mg/kg以下,低聚物含量在50000mg/kg以下以及氯化钠含量在10000mg/kg以下时产物PDA的特征粘度降低变化量不超过0.2dL/g。

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It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发,分析对称连杆曲线上鲍尔点的产生条件,提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品,年生产总值3000万美元,产品价廉物美、选料上乘、质量保证,深受国内外客户的青睐

The eˉtiology of hemospermia is complicate,but almost of hemospermia are benign.

血精的原因很,以良性病变为主。