TITLE

Synthesis of Pd Composite Tubes by Electroless Plating for Isobutane Dehydrogenation

AUTHOR(S)
Kilicarslan, Saliha; Dogan, Meltem
PUB. DATE
April 2012
SOURCE
Gazi University Journal of Science;2012, Vol. 25 Issue 2, p485
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Isobutene is used as a raw material in the production of ethers for increasing the octane rating and reducing exhaust emissions in gasoline. Dehydrogenation of isobutane is an endothermic equilibrium-limited reaction. Recent studies have focused on overcoming equilibrium limitations by removing the product hydrogen through a membrane. In this study, alumina-modified porous glass supports were plated with Pd using electroless plating (ELP). Plating studies were carried out at 35°C and pH 10-11 in a hydrazine-based plating bath. The thickness of the Pd layer was approximately 100-130 p-m. The synthesized composite tube was tested in an isobutane dehydrogenation process over a pure Cr203 catalyst in a fluidized bed reactor. The reaction tests were performed at 450oC at slightly greater than atmospheric pressure. The fractional conversion ofi-C4H10 to i-C4H8 was approximately 40% at the beginning of the first reaction trial. This value decreased to 5% after 60 minutes. High conversion values were observed in the first trial despite loss of isobutane through the Pd membrane. It was thought that this was due to Pd catalysis of an isobutane hydrogenation reaction using ambient hydrogen, and that this side reaction helped shift the reaction equilibrium to the product side. The conversion decreased as the catalytic activity was reduced by carbon deposits from rapid cracking of methane at the high temperatures resulting from the hydrogenation reaction.
ACCESSION #
79758588

 

Related Articles

  • Comparison of Analytical Techniques for Measuring Hydrocarbon Emissions from the Manufacture of Fiberglass-Reinforced Plastics. Wright, Robert S.; Kong, Emery J.; Bahner, Mark A.; Clayton, C. Andrew; Nuñez, Carlos M.; Ramsey, Geddes H. // Journal of the Air & Waste Management Association (Air & Waste M;Sep99, Vol. 49 Issue 9, p1110 

    Research Triangle Institute and the U.S. Environmental Protection Agency conducted several projects to measure hydrocarbon emissions associated with the manufacture of fiberglass-reinforced plastics. The purpose of these projects was to evaluate pollution prevention techniques to reduce...

  • Effect of Methyl Tertiary Butyl Ether Concentrations on Exhaust Emissions from Gasoline Used in the Metropolitan Area of Mexico City. Schifter, Isaac; Diaz, Luis; Avalos, Sergio; Vera, Mario; Barrera, Adrian; Lopez-Salinas, Esteban // Journal of the Air & Waste Management Association (Air & Waste M;Apr2000, Vol. 50 Issue 4, p488 

    In this work, the primary objective was to assess the impact of oxygenated fuel on the exhaust emissions from an important fraction of vehicles in the Metropolitan Area of Mexico City (MAMC). The results aim to provide information on the actual effect of MTBE on a fleet that represents more than...

  • Carbon stoplight. Johnson, Jim // Waste News;9/29/2003, Vol. 9 Issue 11, p5 

    A car-sharing business with more than 15,000 members says its becoming the first company in the nation that is offsetting all of its carbon emissions. Flexcar, which does business in a dozen cities and counties in five states and the District of Columbia, is joining with a conservation group...

  • Biogenic Emissions from Green Waste and Comparison to the Emissions Resulting from Composting Part II: Volatile Organic Compounds (VOCs). B�y�ks�nmez, Fatih; Evans, Jason // Compost Science & Utilization;Summer2007, Vol. 15 Issue 3, p191 

    The cumulative emissions of volatile organic compounds (VOCs) resulting from natural decay of selected green waste, i.e. grass clippings, woodchips and prunings, and from composting of the same feedstock were studied. The results indicated that terpenes were the only compounds emitted from the...

  • The work environment disability-adjusted life year for use with life cycle assessment: a methodological approach. Scanlon, Kelly A.; Gray, George M.; Francis, Royce A.; Lloyd, Shannon M.; LaPuma, Peter // Environmental Health: A Global Access Science Source;2013, Vol. 12 Issue 1, p1 

    Background: Life cycle assessment (LCA) is a systems-based method used to determine potential impacts to the environment associated with a product throughout its life cycle. Conclusions from LCA studies can be applied to support decisions regarding product design or public policy, therefore, all...

  • La medición rigurosa de emisiones brutas de partículas en la fusión de hierro como herramienta para su óptima gestión. Meléndez-Arranz, Antton; Mateo, Cristina Gutiérrez-Cañas // DYNA - Ingeniería e Industria;jul/ago2012, Vol. 87 Issue 4, p411 

    In this article, the author is going to present the results of a large research project related to the particulate matter within the iron foundries melting shops. It was decided to analyze the raw emissions, in other words, emissions produced behind the fabric filters, in order to assure that...

  • Characterization of Spatial Impact of Particles Emitted from a Cement Material Production Facility on Outdoor Particle Deposition in the Surrounding Community. Yu, Chang Ho; Fan, Zhihua (Tina); McCandlish, Elizabeth; Stern, Alan H.; Lioy, Paul J. // Journal of the Air & Waste Management Association (Air & Waste M;Oct2011, Vol. 61 Issue 10, p1015 

    The objective of this study was to estimate the contribution of a facility that processes steel production slag into raw material for cement production to local outdoor particle deposition in Camden, NJ. A dry deposition sampler that can house four 37-mm quartz fiber filters was developed and...

  • TOWARDS A RESOURCE EFFICIENT EU ECONOMY.  // PPI: Pulp & Paper International;Jun2012, Vol. 54 Issue 6, p31 

    The article discusses the importance of the recycling value chain in Europe and the challenges faced by the recycling sector. It mentions that recycling offers several benefits including the reduction in energy consumption and carbon dioxide emissions and the decrease in the dependency of the...

  • La gestión eficaz de los residuos en el entorno de las buenas prácticas de la industria farmacéutica. Trecco, Cecilia; Castello, Vanesa; Romina, Kedikian; Cecilia, Sobrero; Ada, Sisti; Sergio, Oviedo // Producción Más Limpia;2011, Vol. 6 Issue 2, p32 

    Introduction. Pharmaceutical industries use raw materials,, energy,, capital and labor force to make sociably desirable goods but, also, produce undesirable sub products for which, usually, there are no positive pricing,, nor markets. Among those sub products there are pollution emissions, waste...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics