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Measurements of Hydrate Equilibrium Conditions for CH4, CO2, and CH4＋C2H6＋C3H8 in Various Systems by step-heating Method

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Chinese Journal of Chemical Engineering 2009年第4期17卷 635-641页

作者：陈立涛孙长宇陈光进聂运强孙占松刘延涛 State Key Laboratory of Heavy Oil Processing China University of Petroleum Beijing 102249 China

Phase equilibrium conditions of gas hydrate in several systems were measured by the step-heating method using the cylindrical transparent sapphire cell *** experimental data for pure CH4 or CO2+deionized water systems showed good agreement with those in the *** kind of method was then applied to CH4/CO2+sodium dodecyl sulfate(SDS)aqueous solution,CH4/CO2+SDS aqueous solution+silica sand,and(CH4+C2H6+C3H8)gas mixture+SDS aqueous solution systems,where SDS was added to increase the hydrate formation rate without evident influence on the equilibrium *** feasibility and reliability of the step-heating method,especially for porous media systems and gas mixtures systems were *** experimental data for CO2+silica sand data shows that the equilibrium pressure will change significantly when the particle size of silica sand is less than 96μ*** formation equilibrium pressure was also measured by the reformation of hydrate.

关键词： equilibrium condition hydrate step-heating sodium dodecyl sullate silica sand

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Identification of Carbon Black in Military Textiles Using Infrared Imaging Techniques

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Optics and Photonics Journal 2013年第4期3卷 27-30页

作者： J. R. Andrés R. Hidalgo-Gato J. M. López-Higuera F. J. Madruga Photonic Engineering Group University of Cantabria Santander Spain

The carbon black has been used in military fabrics to comply with the color requirements and infrared radiation lessening criteria. Currently, military industries don’t distinguish between fabrics with carbon black fibers or with carbon black into dyes or prints. The latter initially allows us to comply with the color specifications in the visible and infrared, but fabrics are degraded with use losing that initial capacity. The inclusion of carbon black in the fiber gets that the fabric doesn’t degrade with the wear, washed and dried, ensuring the accomplishment of the specifications all the time. The use of infrared imaging will allow us to define a method to discriminate those textiles with carbon black in their fibers from those which are dyed or printed.

关键词： Military Textiles Fabrics Infrared Imaging step-heating Carbon Black Thermal Response

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