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- 与 catalysts 相关的网络例句 [注:此内容来源于网络,仅供参考]
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At last, 5 Pt catalysts was successfully prepared by the Sol-Gel method. The composition, microgram and pore size distribution of 6 catalysts(including 5 Pt catalysts and zeolite) are studied by the XRD and Nitrogen adsorption method.
温度范围300-900℃。最后,利用溶胶-凝胶法制备了5种Pt催化剂,使用XRO和氮吸附法对Pt催化剂和沸石的晶体结构和表面织构进行了表征。
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A series of molybdenum carbide catalysts were prepared using 20%CH4-H2 to carburize molybdenum trioxide at different temperatures. The catalysts were characterized using X-ray diffraction, X-ray photoelectron spectroscopy and N2-adsorption. Their catalytic performance was evaluated in the model reaction of the dry-methane reforming to synthesis gas. Here, the characteration of bulk and surface Mo2C catalysts and its influence on the catalytic performance were described.
以MoO3为前驱物,于20%CH4-80%H2的混合气体(100 mL/min)中,在不同设定终温下进行碳化,制备了一系列不同碳化终温的Mo2C,通过XRD和XPS等手段进行了表征,并对其甲烷二氧化碳重整制备合成气的催化性能进行评价,讨论了碳化终温作为Mo2C的制备参数,与所制备的Mo2C体相、表面特征和催化剂性能的关系。
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The unnoble metal Cobalt catalysts were selected in the reaction system. The study was both of theoretical significance of selective hydrogenation and practical significance of making full of abound bay oil resources in GuangXi province. Cobalt-based catalysts of Co-La/Al2O3 modified by La and Co-Fe/Al2O3 modified by Fe were prepared by impregnation. The selectivity and activity of catalysts were elvaluated with active test.
本工作是国家自然科学基金课题"α,β-不饱和醛选择加氢为不饱和醇多相催化剂的研究"(编号:20266001)的重要组成部分,选择的是非贵金属钴催化剂体系,该研究对于发展选择性催化加氢和充分利用广西丰富的桂油资源具有重要的理论和现实意义。
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Basing on above researches, we designed a series of ionic liquid supported acetylacetone metal catalysts and non ionic liquid supported acetylacetone metal catalysts. The catalytic abilities of these catalysts were evaluated by using them to catalyze the methane oxidation reaction.
在以上研究的基础上,本论文设计了系列离子液体支载的乙酰丙酮金属催化剂及非离子液体支载的乙酰丙酮金属催化剂,并通过这些催化剂对甲烷氧化反应的催化效果来预测它们的活性。
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SO〓〓/M〓O〓 solid superacid was applied to the photocatalytic oxidation of organic pollutants for the first time. Porous SO〓〓/TiO〓 solid superacid catalysts with high specific surface area were prepared by sol-gel method. The photocatalytic degradation of bromomethane was used as model reaction. The influence of impregnation with H〓SO〓 solution on the structure of catalysts and their photocatalytic performance was systematically studied by using X-ray diffraction, X-ray photoelectron spectroscopy, N〓 sorption analysis applying BET method, UV-Vis diffuse reflectance spectroscopy, FTIR spectroscopy, O〓-TPD and photocatalytic activity measurement. The acidity of TiO〓-based catalysts was investigated by Hammett indicator method, NH〓-TPD and IR spectra of pyridine adsorbtion. The mechanism of superacidifing effects on photocatalytic performances such as the photocatalytic degradation rate of bromomethane, apparent kinetic constant and apparent quantum efficiency was discussed.The results indicated that SO〓〓 is combined with metal ions of TiO〓 in a chelating bidentate mode.
本文首次将SO〓〓/MxOy型固体超强酸催化剂用于光催化氧化有机污染物研究,采用溶胶-凝胶法制备了具有多孔性和大比表面结构的二氧化钛基固体超强酸光催化剂SO〓〓/TiO〓,以光催化降解溴代甲烷为模型反应,系统地研究了H〓SO〓浸渍处理对催化剂表面酸性及其气相光催化性能的影响,结合XRD、BET、XPS、FTIR、Hammett指示剂法、吡啶吸附红外光谱、NH〓-TPD、O〓-TPD、紫外可见漫反射光谱等多种表征手段,深入地讨论了超强酸化对TiO〓的改性机理,阐明了引起SO〓〓/TiO〓超强酸催化剂光催化降解溴代甲烷的转化率、表观反应速率常数和表观量子效率变化的本质原因。
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The catalytic performance of all the amorphous alloy catalysts mentioned above was measured during liquid phase hydrogenation of furfural to furfuryl alcohol, together with the kinetic studies. The relationship between the catalyst performance and the structure of catalyst, surface electronic state of the amorphous alloy has been systematically studied based on a series of characterization of catalysts . Meanwhile, the promoting effects of the support on the thermal stability and catalytic activity of the amorphous alloy catalysts have been discussed.
本文采用一系列的表征方法(XRD、XPS、TEM、BET、氢吸附、TPD等)进一步研究非晶态合金催化剂的表面结构、表面电子态和催化性能之间的关系,探索电子效应和几何效应对催化剂活性中心结构的影响,探索非晶态合金的晶化失活和载体对非晶态结构的稳定化作用,以及修饰剂对催化性能的改善作用等。
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The analytical results have shown that p ro ducts mainly consisted of some monosubstituted, disubstituted and a few trisub stituted naphthalenes. Except the low activity of HZSM-5 catalyst, all other z eolite catalysts have higher activity. HY and Hβ catalytic activities were the highest, and their naphthalene conversions attained to 79.12 and 55.79 percent respectively, but their selectivities for 2-isopropylnaphthalene, 2,6-diisopropylnaphthalene(2,6-DIPN) and 2,7-diisopropylnaphthalene ( 2,7-DIPN) were too low. ZM catalysts had good activity and much better selecti vity, especially for ZM4-3, of which its 2,6-DIPN/2,7-DIPN ratio was 2.97. Th er efore, some zeolite catalysts are recommended for shape selective isopropylat ion of coal tar naphthalene.
研究结果表明,煤焦油萘异丙基化产物主要由一取代萘、二取代萘以及少量三取代萘组成;除HZSM-5活性较低以外,其它催化剂均有较高的反应活性,其中HY和Hβ反应活性最高,萘转化率分别达75.15%和55.96%,但β位产物的选择性较差;ZM类催化剂既有一定的活性,又有较高的β选择性,是萘择形异丙基化反应理想的备选催化剂。
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The result indicated that the σ-AgFeO2 phases are the main att ribution to the surface oxygen property and CO oxidation activity of catalysts.M eanwhile,the Ag/Fe(1∶1)catalyst exhibited the highest reducibility and CO oxid ation activity among the other ratio of catalysts which resulted with the cr ystal of the σ-AgFeO2 in catalysts.
研究结果表明,催化剂上生成的σ-AgFeO2晶相结构对催化剂的表面氧性能及CO氧化反应贡献较大,同时发现,Ag/Fe(1∶1)催化剂的还原能力、氧脱附能力明显优于其他比例的催化剂,并与 CO氧化活性相对应。
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The present dissertation deals with:(1) Exploring the feasibility of the CO〓 methanation and the conversion CH〓/H〓 into C〓 hydrocarbons under plasma with catalyst at ambient temperature and atmosphere.(2) Designing a reactor and preparing some catalysts suited for the conversion of carbon dioxide via the cooperation effect of plasma and catalysts.(3) Optimizing reaction conditions of conversion carbon dioxide to C〓 hydrocarbons in the proposed process.(4) Studying the reaction mechanism of conversion carbon dioxide to C〓 hydrocarbons under plasma by using in situ OES technology.(5) By the results of characterizing coked catalysts, exploring the reasons that result in the coking of catalyst and the paths for decreasing the deposit in the catalyst under plasma.(6) Analyzing the energy efficiency of the plasma catalysis and exploring the paths for improving the energy efficiency.
论文的主要研究工作包括:(1)探索脉冲电晕等离子体与催化剂共同作用CO〓/H〓甲烷化和由CH〓/H〓合成C〓烃反应的可行性;(2)研制等离子体催化CO〓转化的反应器和适配的催化剂;(3)优化等离子体催化CO〓转化制C〓烃反应的工艺条件和电参数;(4)利用原子发射光谱原位技术对等离子体反应的诊断结果,对等离子体催化CO〓转化制C〓烃反应的机理进行推断;(5)通过对积碳催化剂的表征结果,分析积碳的类型及其成因,并探讨减少积碳的途径;(6)通过对等离子体催化CO〓转化制C〓烃反应能量效率的分析,探讨提高等离子体催化反应能量效率的途径。
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In range of 300℃~900℃, all the transition metal oxide catalysts could get high ammonia conversion, during the initial stages of the reaction, the SO〓 conversion is relatively low since the catalysts have not been sulfureted, but it increases gradually and attain constant with rising temperature and time continuance,〓 is better than other catalysts in reactivity and elemental sulfur selectivity; XRD indicates that, in the SO〓-SCR process, stable transition metal sulfide is generated which is very important to SO〓 reduction and transition metal sulfide probably is the active phase of catalyst, further the reduction of SO〓 by H〓 to H〓S is the limiting step of all process, then the activity is somewhat related to its lattice oxygen yet not so notable; XPS indicates that little sulfur on surface exists as S〓 in sulfate, showing that TiO〓 could restrain the generation of sulfate.
对于过渡金属氧化物催化剂的研究发现,在300℃~900℃范围内,不同的催化剂均可获得很高的NH〓转化率,反应初期由于催化剂还未硫化,所以SO〓的转化率较低,随着温度升高和反应时间的延续,SO〓的转化率逐渐升高并达到了稳定值;七种过渡金属氧化物中,以〓对于NH〓还原SO〓反应的活性和选择性最好;XRD结果表明在NH〓-SO〓反应后生成了稳定的硫化物相,硫化物对SO〓的还原过程具有重要作用,催化剂的活性相可能是过渡金属硫化物,而且在硫化物催化剂上进行的H〓还原SO〓生成H〓S的反应是整个过程的速率控制步骤,所以催化剂的活性与其自身的晶格氧的氧化还原能力有一定的联系,但关系不明显;XPS结果表明催化剂表面的硫大部分以过渡金属硫化物的形式存在,只生成少量的S〓,说明TiO〓催化剂能够较好的抑制硫酸盐的生成。
- 推荐网络例句
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With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.
随着死亡的吉他手Schuldiner接受主唱的职务,乐队在现实中树立了重要的影响。
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But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.
不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐,因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。
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Closes the eye, the deep breathing, all no longer are the dreams as if......
关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。