Download Steam Page
Vicky Greenwell
EU and UK law provides a statutory right to withdraw from certain contracts for physical merchandise and for the order of digital content. You can find more information about the extent of your statutory right to withdraw and the ways you can exercise it on this page: _article.php?ref=8620-QYAL-4516.
When you upload your content to Steam to make it available to other users and/or to Valve, you grant Valve and its affiliates the worldwide, non-exclusive right to use, reproduce, modify, create derivative works from, distribute, transmit, transcode, translate, broadcast, and otherwise communicate, and publicly display and publicly perform, your User Generated Content, and derivative works of your User Generated Content, for the purpose of the operation, distribution, incorporation as part of and promotion of the Steam service, Steam games or other Steam offerings, including Subscriptions. This license is granted to Valve as the content is uploaded on Steam for the entire duration of the intellectual property rights. It may be terminated if Valve is in breach of the license and has not cured such breach within fourteen (14) days from receiving notice from you sent to the attention of the Valve Legal Department at the applicable Valve address noted on this Privacy Policy page. The termination of said license does not affect the rights of any sub-licensees pursuant to any sub-license granted by Valve prior to termination of the license. Valve is the sole owner of the derivative works created by Valve from your User Generated Content, and is therefore entitled to grant licenses on these derivative works. If you use Valve cloud storage, you grant us a license to store your information as part of that service. Valve may place limits on the amount of storage you may use.
You represent and warrant to us that you have sufficient rights in all User Generated Content to grant Valve and other affected parties the licenses described under A. and B. above or in any license terms specific to the applicable Workshop-Enabled App or Workshop page. This includes, without limitation, any kind of intellectual property rights or other proprietary or personal rights affected by or included in the User Generated Content. In particular, with respect to Workshop Contributions, you represent and warrant that the Workshop Contribution was originally created by you (or, with respect to a Workshop Contribution to which others contributed besides you, by you and the other contributors, and in such case that you have the right to submit such Workshop Contribution on behalf of those other contributors).
You'd feel heat from the firebox, smell hot steam and oil; you'd hear the whistle, feel the ground vibrate, and watch as one-ton drive rods turned steel wheels. Remember the sound of "chuff-chuff" from the smokestack? Today, you can learn the history of steam railroad transportation, and the people who built, repaired and rode, as we work to preserve a special era in America's industrial history!
Full text is available as a scanned copy of the original print version. Get a printable copy (PDF file) of the complete article (1.3M), or click on a page image below to browse page by page. Links to PubMed are also available for Selected References.
The steam reforming of hydrocarbon fuels is a promising method for the production of hydrogen for portable electrical power sources. A suitable reactor for this application, however, must be compatible with temperatures above 800 degrees C to avoid coking of the catalytic structures during the reforming process. Here, ceramic microreactors comprising high surface area, tailored macroporous SiC porous monoliths coated with ruthenium (Ru) catalyst and integrated within high-density alumina reactor housings were used for the steam reforming of propane into hydrogen at temperatures between 800 and 1000 degrees C. We characterized these microreactors by studying C3H8 conversion, H2 selectivity, and product stream composition as a function of the total inlet flow rate, steam-to-carbon ratio (S/C), and temperature. As much as 18.2 sccm H2, or 3.3 x 104 sccm H2 per cm3 of monolith volume, was obtained from a 3.5 sccm entering stream of C3H8 at a S/C of 1.095 and temperatures greater than 900 degrees C. Operating at a S/C close to 1 reduces the energy required to heat excess steam to the reaction temperature and improves the overall thermal efficiency of the fuel processor. Kinetic analysis using a power law model showed reaction orders of 0.50 and -0.23 with respect to propane and steam, respectively, indicating that the rate limiting step in the steam reforming reaction is the dissociative adsorption of propane on the Ru catalyst. The performance of the microreactor was not affected after exposure to more than 15 thermal cycles at temperatures as high as 1000 degrees C, and no catalyst deactivation was observed after more than 120 h of continuous operation at 800 degrees C, making these ceramic microreactors promising for efficient on-site hydrogen production from hydrocarbons for use in polymer electrolyte membrane (PEM) fuel cells.
f448fe82f3