Smoke Generators. III. The ignition of pyrotechnic white smoke compositions containing hexachloroethane, silumin and metal oxides using a heated metal surface

1984 ◽  
Vol 9 (2) ◽  
pp. 64-71 ◽  
Author(s):  
F. R. Hartley ◽  
S. G. Murray ◽  
M. R. Williams
Keyword(s):  
Metal Oxides ◽  
Metal Surface ◽  
Heated Metal

scholarly journals Characterization and performance of W-ZSM-5 and loaded Cu/ZsM-5 catalysts

2018 ◽  
Vol 4 (1) ◽  
pp. 137
Author(s):  
Didi Dwi Anggoro ◽  
Nor Aishah Saidina Amin
Keyword(s):  
Metal Oxides ◽  
Surface Area ◽  
Methane Oxidation ◽  
Metal Surface ◽  
Reaction Temperature ◽  
Methane Conversion ◽  
Liquid Hydrocarbons ◽  
Olefin Oxidation ◽  
Metal Surface Area ◽  
And Performance

The metal oxides with sufficiently high dehydrogenation and low olefin oxidation activities reduces the acidity of ZSM-5. As a result, the metal containing ZSM-5 can produce higher hydrocarbons in methane oxidation. Many researchers studied the applicability of HZSM-5 and modify ZSM-5 to methane conversion to liquid hydrocarbons but result of their research still lead to low conversion and selectivity. The modified HZS-5 by loading with Tungsten (W) enhanced its heat resistant performance, and the high reaction temperature (800ºC) did not lead to the loss of W component by sublimation. The loading of HZSM-5 with Tungsten and Cooper (Cu) resulted in an increment in the methane conversion, CO2 and C5+ selectivities. In contrast, CO, C2-3, and H2O selectivities were reduced. The process to convert methane to liquid hydrocarbons (C5+) was dependent on the metal surface area and the acidity of zeolite. The high methane conversion and C5+ selectivity, and low H2O selectivity are obtained by using W/3.0Cu/HZSM-5.  Keywords : Characterization W-ZSM-5, Modified HZSM-5, Tungsten, Copper, Methane  Abstrak  Logam oksida dengan kemampuan dehidrogenasi yang tinggi dan aktifasi oksidasi olefin berkurang dengan sifat keasaman dari ZSM-5. Sebagai hasilnya, ZSM-5 yang mengandung logam dapat memproduksi hidrokarbon rantai panjang dari oksidasi gas metana. Telah banyak para peneliti mempelajari kemampuan HZSM-5 dan ZSM-5 yang telah dimodifikasi untuk mengubah gas metana menjadi hidrokarbon cair tetapi hasil konversi dan selektivitasnya masih rendah. Modifikasi HZSM- 5 dengan penambahan logam Tungsten (W) meningkatkan daya tahan panas dan pada reaksi suhu tinggi (800ºC) tidak menyebabkan hilangnya logam W dikarenakan proses sublimasi. Penambahan logam Tungsten dan Copper (Cu) menyebabkan meningkatnya konversi metana, selektifitas CO2 dan C5+ Sebaliknya, selektifitas CO,C2-3, dan H2O menurun. Proses konversi metana menjadi hidrokarbon cair ditentukan oleh luas permukaan logam dan sifat keasaman dari zeolite.  Penggunaan katalis W/3.0Cu/HZSM-5 menghasilkan konversi metana dan selektifitas C5+ tinggi dan selektifitas H2O rendah.  Kata kunci : Karakterisasi W-ZSM-5, Modifikasi HZSM-5, Tungsten, Copper, Metana

T0501-2-2 Characteristics of boiling on a vertically aligned SWNTs film bonded to a heated metal surface

2009 ◽  
Vol 2009.8 (0) ◽  
pp. 109-110
Author(s):  
Makoto WATANABE ◽  
Tomoyoshi TAKEI ◽  
Takahiro FUKUTOMI ◽  
Shigeo MARUYAMA ◽  
Masahiro SHOJI
Keyword(s):  
Metal Surface ◽  
Vertically Aligned ◽  
Heated Metal

scholarly journals On the passage of heat between metal surfaces and liquids in contact with them

1897 ◽  
Vol 61 (369-377) ◽  
pp. 287-291 ◽  
Keyword(s):  
Metal Surface ◽  
Metal Surfaces ◽  
Hot Water ◽  
Heated Metal

The determination of the rate of transmission of heat from the surface of a heated metal to colder water in contact with it, or from hot water to a colder metal surface, is a problem of some importance in the theory of boilers and surface condensers, but the difficulty of experimentally determining this rate and the constants involved, for cases which occur in ordinary practice, is so great that, as far as the author is aware, only approximate results have been obtained.

SYNTHESIS OF ZINC OXIDE NANOPARTICLES BY THE REACTION OF ZINC METAL WITH ETHANOL

2009 ◽  
Vol 23 (06) ◽  
pp. 871-876
Author(s):  
M. A. SHAH
Keyword(s):  
Zinc Oxide ◽  
Metal Oxides ◽  
Metal Surface ◽  
Zinc Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Simple Reaction ◽  
Zinc Metal ◽  
Novel Approach ◽  
Plausible Mechanism

A novel approach has been described for the synthesis of zinc oxide nanoparticles by a very simple reaction of zinc metal with ethanol at 200°C. The diameters of the nanoparticles range from 50–200 nm. The reaction involves the cleavage of C–O bond of the alcohol, which occurs readily on the zinc metal surface. Addition of ethylenediamine to the reaction yields nanorods, thus acting as a shape-directing agent. A plausible mechanism is proposed for the formation of these nanostructures and it is expected that this synthetic technique can be extended to obtain other metal oxides.

Suppression concentration of clean agents exposed to a continuously energized heated metal surface

1999 ◽  
Vol 33 (2) ◽  
pp. 141-152 ◽  
Author(s):  
E Braun ◽  
C.A Womeldorf ◽  
W.L Grosshandler
Keyword(s):  
Metal Surface ◽  
Heated Metal

Growth of Zinc Oxide Nanoparticles by the Reaction of Zinc with Ethanol

2009 ◽  
Vol 67 ◽  
pp. 215-219 ◽  
Author(s):  
M. Ashraf Shah
Keyword(s):  
Zinc Oxide ◽  
Metal Oxides ◽  
Metal Surface ◽  
Zinc Oxide Nanoparticles ◽  
Nano Particles ◽  
Oxide Nanoparticles ◽  
Simple Reaction ◽  
Zinc Metal ◽  
Novel Approach ◽  
Plausible Mechanism

A novel approach has been described for the synthesis of zinc oxide nanoparticles by a very simple reaction of zinc metal with ethanol at 100oC. The diameters of the nano-particles range from 50–100nm. The reaction involves the cleavage of C-O bond of the alcohol, which occurs readily on zinc metal surface. Addition of ethylenediamine to the reaction yields nanorods, thus acting as a shape directing agent. A plausible mechanism is proposed for the formation of these nanostructures and is expected that this synthetic technique can be extended to obtain other metal oxides.

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