Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Causes of alumina catalyst deactivation in a process of skeletal n-butene isomerization, which leads to decreasing of the conversion from 31 to 26 % were examined. It is shown that contamination of Fe, Mg metal combination microimpurities reduces the conversion of n-butenes of about 2,5 %. The catalyst activity can be…
Though sufficient for local conservation of charge, Maxwells displacement current is not necessary. An alternative to the Ampere-Maxwell equation is exhibited and the alternatives electric and magnetic fields and scalar and vector potentials are expressed in terms of the charge and current densities. The magnetic fiel…
National audience
Cong nghệ điện hoa được dựa tren cơ sở cac quy luật li thuyết về sự chuyển hoa nang lượng hoa học va điện với thong số đặc trưng la mật độ dong va điện thế cũng như được ứng dụng rộng rai trong cac nganh cong nghiệp nang lượng va pin nhien liệu, luyện kim mau va vật liệu chức nang, sản xuất hoa chất va thuốc, chống an…
Investigation of the influence of the chemical composition of support, substance and the method of nickel fixing on the physico-chemical and catalytic properties of the NiO/B2O3–Al2O3 system was conducted. Boron oxide content in the support was varied from 2 to 30 wt.% and a nickel content from 0,59 up to 3,18 wt.%. C…
Nanoparticulate catalysts M/Ce0,72Zr0,18Pr0,1O2, where M – Pt, Pd, Ru at 0,5; 1,0 and 2,0 wt.%, for diesel exhaust soot afterburning in a «weak» contact were synthesized. Structural, textural and catalytic properties of the samples were studied using EDX, X-ray synchrotron diffraction, XANES, EXAFS, TEM, low-temperatu…
Catalysts for deep oxidation of methane were studied using the methods of X-ray diffraction, thermal desorption of nitrogen and temperature-programmed reduction with hydrogen. These catalysts comprise oxides of 3d-metals (Mn, Co), rare earth (La) and alkaline earth (Ba, Sr) elements in a porous matrix of secondary sup…
The effect of modifying the conditions of the natural aluminosilicate catalyst by 10 % HCl solution on its chemical and phase composition, porous and crystalline structure, acidity and catalyst activity in the reaction of α-pinene isomerization. When aluminosilicate are treated by 10 % HCl in an amount of 25–250 ml pe…
Abstract isolation, structure determination, and antimicrobial activity of two new friedelane‐type triterpenoids (I) and (II) along with five known triterpenoids
Abstract The title nanoplates with an average width of 320 nm and thicknesses of 50—90 nm are solvothermally synthesized from mixtures of Bi(NO3)3, sodium dodecyl benzene sulfonate, polyethylene glycol, and H2O (autoclave, 180 °C, 20 h).
采用γ﹣Al2 O3为载体通过浸渍法制备了 AuCl3﹣CuCl2∕γ﹣Al2 O3催化剂，考察其对乙炔氢氯化反应的催化性能，并用比表面积及孔径分析、扫描电镜、能谱仪、傅里叶变换红外光谱、电感耦合等离子体原子发射光谱等表征方法对催化剂的失活原因进行分析。结果表明：在温度150℃、压力0．1 MPa、空速120 h﹣1、V（HCl）∶V（C2 H2）＝1．05的工艺条件下，乙炔转化率达到97％以上，氯乙烯选择性达到99％以上，但反应3 h后催化剂活性迅速降低；催化剂表面积炭为其失活的主要原因。将失活催化剂在空气氛围、500℃下焙烧1 h后，其活性基本能恢复至新鲜催化剂水平，说明该催化剂具有优异的再生性能。
Abstract A force‐equilibrium model is established to discuss the size effects of alkali metal cations on structural transitions in the title compounds.
Abstract The catalyst can be recycled and reused at least 4 times without a significant loss in activity.
Abstract Single crystals of MnUO4 (I) are prepared from U3O8 and MnCl2 in a molten CsCl flux (alumina crucible, 900 °C, 12 h).
Small power sources based on micro-SOFC for mobile electronic devices required two conditions, i,e, thermally compatibility and thermally self-sustain, because of high operating temperature over 300 o C. Moreover, high energy efficiency was also required. It meant that this system should be designed considering therma…
Abstract Review: 12 refs.
Abstract Subporphyrin (I) shows a red‐shifted UV/Vis absorption band that arises from macrocycle nonplanar distortion induced by the trifluoromethyl groups.
Surface enhanced Raman Scattering (SERS) has attracted attention because the technique enables detection of various chemicals, even down to single molecular scale. Among the diverse candidates for SERS substrates, Au nanoparticles are considered promising due to their fine optical properties, chemical stability and ea…
This paper presents the fabrication of a new energy harvesting module that used the thermoelectric device (TED) by using molding technology. The output voltage per heater temperature of the TED module at 20 °C ambient temperature is 8mV/K and similar to the result with the aluminium heat sink which is almost the same…
This paper deals with low-velocity impact and quasi-static indentation tests on carbon fibre reinforced plastic (CFRP) laminates that classically used in aeronautical applications. The aim is to carry out post-impact analysis using Vic 3-D digital image correlation to investigate the behaviour of permanent indentation…