Showing papers by "Heather D. Willauer published in 2009"
TL;DR: In this paper, the authors investigated the ability of a Fischer−Tropsch Co−Pt/Al2O3 catalyst for the hydrogenation of CO2 using a traditional Fischer−Tsch Co −Pt /Al 2O3 catalytic catalyst.
Abstract: The hydrogenation of CO2 using a traditional Fischer−Tropsch Co−Pt/Al2O3 catalyst for the production of valuable hydrocarbon materials is investigated. The ability to direct product distribution was measured as a function of different feed gas ratios of H2 and CO2 (3:1, 2:1, and 1:1) as well as operating pressures (ranging from 450 to 150 psig). As the feed gas ratio was changed from 3:1 to 2:1 and 1:1, the production distribution shifted from methane toward higher chain hydrocarbons. This change in feed gas ratio is believed to lower the methanation ability of Co in favor of chain growth, with possibly two different active sites for methane and C2−C4 products. Furthermore, with decreasing pressure, the methane conversion drops slightly in favor of C2−C4 paraffins. Even though under certain reaction conditions product distribution can be shifted slightly away from the formation of methane, the catalyst studied behaves like a methanation catalyst in the hydrogenation of CO2.
128 citations
TL;DR: In this article, the surface energies of parent and child droplets were determined from the surface energy of parent droplets and the analysis showed about 22-fold increase in surface area of the child.
51 citations
TL;DR: Results suggest that current water mist technology is a potentially promising concept for the mitigation of overpressure effects produced from the detonation of high explosives.
45 citations
TL;DR: In this article, the storage stability of a three-part mixture consisting of Fischer−Tropsch diesel, a petroleum diesel, and a 5% and 10% soy biodiesel under ambient conditions is compared.
Abstract: The Department of Defense is the largest consumer of middle distillate fuels. It has been recommended that alternative fuel sources be considered as replacements or blending stocks for middle distillate ground transportation and marine fuels. Therefore, the search for suitable replacements or blending stocks is earnestly continuing. Renewable agricultural crops such as soybeans and others are now in the forefront. Nonrenewable synthetic fuels such as those produced by Fischer−Tropsch, FT, synthesis from coal and natural gas have been suggested. It is probable that several of these substitutes would be simultaneously blended into a middle distillate petroleum based diesel fuel. Care must be employed when blending fuels so that fuel specifications and storage stability are not decreased. This paper compares the storage stability of a three-part mixture consisting of Fischer−Tropsch diesel, a petroleum diesel, and a 5% and 10% soy biodiesel under ambient conditions.
9 citations