Selective reduction of NOx by H2 and CO in excess O2 was studied using a Pd/Al2O3 catalyst. Incipient wetness impregnation into Al2O3 was done using PdCl2 as the metal precursor. The NOx conversion profile was maximal at 423 K (up to 95.2% for 250 ppm CO), at which temperature complete oxidation of H2 and CO occurred. There is a very strong synergic effect when both CO and H2 are simultaneously...

Stainless steel interconnect materials used in solid oxide fuel cells and electrolysers need to be coated improve oxidation resistance mitigate Cr-vaporization. This work aimed explore the optimal steel/coating combinations suitable for use reversible stacks evaluated (Co,Mn)3O4 spinel, LaFeO3 perovskite, Ce/Co Y-based coatings, on AISI441 Crofer 22 APU steels. The coatings were based measureme...

The effect of substitution of Al(3+), Ga(3+) and Sc(3+) ions in the Mn(3+) site of La0.5Sr0.5MnO3 on the thermochemical splitting of CO2 to generate CO has been studied in detail. Both La0.5Sr0.5Mn1-xGaxO3 and La0.5Sr0.5Mn1-xScxO3 give high yields of O2 and generate CO more efficiently than La0.5Sr0.5Mn1-xAlxO3 or the parent La0.5Sr0.5MnO3. Substitution of even 5% Sc(3+) (x = 0.05) results in a...

Previous work from our laboratory demonstrated the feasibility of using sulfur-deprived algal cultures to photoproduce H2 continuously for 3-4 days (Melis et al., 2000; Ghirardi et al., 2000a). The production of H2 depends mostly on the photosynthetic H2O-oxidation activity of the cultures (Ghirardi et al., 2000 a and b; Kosourov et al., 2002), and requires concomitant operation of O2-consumpti...

Variations in biomass-derived syngas composition can be a challenge to efficient combustion and low emissions. A study on the effects of CO2 dilution CH4 addition flame propagating characteristics at high pressure was conducted using heat flux method kinetic simulations. This paper presents laminar burning velocity, SL H2/CO/CO2/O2/diluent mixtures H2/CO/CH4/O2/diluent ϕ = 0.5–2.5, elevated pre...

In this study, we used advanced oxidation process (AOP)for the removal of a cationic and anionic blue dyes, namely Basic Blue 3 (BB3) and Acid blue 62(AB62), from aqueous solutions. Fenton reactions are mixture of H2 O2 and Fe2+. However this paper investigates the application of twelve different catalysts such as: FeCl2 , FeSO4, (NH4 )Fe(SO4 )2 , FeCl3 , Nano iron (Fe0 ), Fe(NO3 )3 , K2FeO4 , ...

Cu2+,Ce3+-doped nanostructure TiO2 -coated Nd3+ (TiO2 /Nd3+) were prepared by sol-gel method. TiO2 were synthesized by the sol-gel method using tetra n-butyl orthotitanat (TBT) as a precursor. The prepared nanoparticles characterized by FT-IR, XRD, SEM- EDS and TEM. The XRD showed that the major phase of nanocomposite is anatase. The morphology of the TiO2/Nd3+/Cu2+and TiO2 /Nd3+/Ce3+ microsphe...

Photobiological production of H2 by cyanobacteria is considered to be an ideal source of renewable energy because the inputs, water and sunlight, are abundant. The products of photobiological systems are H2 and O2; the H2 can be used as the energy source of fuel cells, etc., which generate electricity at high efficiencies and minimal pollution, as the waste product is H2O. Overall, production o...

Explosive forming is one of the unconventional techniques in which, most commonly, the water is used as the pressure transmission medium. One of the newest methods in explosive forming is gas detonation forming which uses a normal shock wave derived of gas detonation, to form sheet metals. For this purpose a detonation is developed from the reaction of H2+O2 mixture in a long cylindrical detona...

‡ The George Washington University, MS 335, NASA Langley Research Center, Hampton, VA, 23681. ABSTRACT The dual-pump coherent anti-Stokes Raman spectroscopy (CARS) method is used to measure temperature and the relative species densities of N2, O2 and H2 in two experiments. Average values and rootmean-square (RMS) deviations are determined. Mean temperature measurements in a furnace containing a...