Influence of concentration gradient on methane–air explosion propagation: An experimental study

This experimental study determines H2 transfer properties of High Density PolyEthylene (HDPE) or epoxy membranes. Two different techniques are compared. The pressure gradient technique is analyzed for permeability or diffusion. Results show that the main phenomenon involved is diffusion. The second technique involves a gas concentration gradient. Although implying significantly slower kinetics, this classical technique is consistent with results obtained with the faster pressure gradient technique.

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An Experimental Study on the Effects of Concentration Gradient and Mean Velocity on the Liftoff Characteristics of the Triple Flame

Transactions of the Korean Society of Mechanical Engineers B ◽

10.3795/ksme-b.2003.27.8.1061 ◽

2003 ◽

Vol 27 (8) ◽

pp. 1061-1070

Keyword(s):

Experimental Study ◽

Concentration Gradient ◽

Mean Velocity

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Experimental Study on Activated Sludge Form Sewage Treatment of Different Oxygen Gradient Reactor

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.374-377.1054 ◽

2011 ◽

Vol 374-377 ◽

pp. 1054-1058

Author(s):

Xi Tian ◽

De Jun Bian ◽

Qing Kai Ren ◽

Hong Qu ◽

Li Guo Wan ◽

...

Keyword(s):

Experimental Study ◽

Wastewater Treatment ◽

Activated Sludge ◽

Oxygen Concentration ◽

Concentration Gradient ◽

Sewage Treatment ◽

High Oxygen ◽

Low Oxygen ◽

Floc Size ◽

Oxygen Gradient

It used dissolved oxygen meter to detect dissolved different oxygen concentration within wastewater treatment reactor and analysed reasons for the formation of oxygen concentration gradient. In order to learn more about activated sludge form of different oxygen gradient in the reactor, biological microscope operated in characteristics of microfauna and activated sludge floc in the reactor has been studied. The results showed that Vorticella and Rotifera could grow normally in the high and low regional areas; there are more abundant micro-fauna species in the area of low oxygen, and the microfauna was more mature than those in the area of high oxygen; activated sludge was brown and floc size was small in the areas of high oxygen, activated sludge was black and floc size was big.

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Experimental study on the effect of modified attapulgite powder with different outlet blockage ratios on methane-air explosion

Energy ◽

10.1016/j.energy.2021.121675 ◽

2021 ◽

pp. 121675

Author(s):

Ke Yang ◽

Kaifeng Chen ◽

Hong Ji ◽

Zhixiang Xing ◽

Yongmei Hao ◽

...

Keyword(s):

Experimental Study ◽

Modified Attapulgite ◽

Air Explosion

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Experimental study on the inhibition of methane/air explosion by modified attapulgite powder

Journal of Loss Prevention in the Process Industries ◽

10.1016/j.jlp.2021.104574 ◽

2021 ◽

pp. 104574

Author(s):

Ke Yang ◽

Kaifeng Chen ◽

Hong Ji ◽

Zhixiang Xing ◽

Yongmei Hao ◽

...

Keyword(s):

Experimental Study ◽

Modified Attapulgite ◽

Air Explosion

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Experimental study on the restoration from a tilt-azimuth series for improvement in resolution

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s042482010013955x ◽

1995 ◽

Vol 53 ◽

pp. 636-637

Author(s):

Norio Baba ◽

Norihiko Ichise ◽

Syunya Watanabe

Keyword(s):

Experimental Study ◽

Spherical Aberration ◽

Incident Beam ◽

Optical Parameters ◽

Beam Tilting ◽

Illumination Method ◽

Restoration Method ◽

Illumination Mode

The tilted beam illumination method is used to improve the resolution comparing with the axial illumination mode. Using this advantage, a restoration method of several tilted beam images covering the full azimuthal range was proposed by Saxton, and experimentally examined. To make this technique more reliable it seems that some practical problems still remain. In this report the restoration was attempted and the problems were considered. In our study, four problems were pointed out for the experiment of the restoration. (1) Accurate beam tilt adjustment to fit the incident beam to the coma-free axis for the symmetrical beam tilting over the full azimuthal range. (2) Accurate measurements of the optical parameters which are necessary to design the restoration filter. Even if the spherical aberration coefficient Cs is known with accuracy and the axial astigmatism is sufficiently compensated, at least the defocus value must be measured. (3) Accurate alignment of the tilt-azimuth series images.

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