Showing papers in "Catalysis Today in 2004"

TL;DR: In this paper, an environmentally benign process for the production of biodiesel from VOs using heterogeneous catalyst was developed, and the basic strength of Na/NaOH/γ-Al2O3 catalyst was estimated and the correlation with the activity towards transesterification was proposed.

TL;DR: In this article, the microstructural and chemical properties of TiO2, obtained by a sol-gel procedure, were investigated by using X-ray diffraction (XRD) and electron spectroscopy for chemical analysis.

TL;DR: Song et al. as mentioned in this paper proposed tri-reforming of methane, which is a synergetic combination of CO2 reforming, steam reforming, and partial oxidation of methane in a single reactor for effective production of industrially useful synthesis gas (syngas).

TL;DR: In this paper, a three-way NOx storage-reduction (NSR) catalyst was developed for automotive lean-burn engines, which can store NOx in an oxidizing atmosphere and then reduce stored NOx at stoichiometric or reducing conditions.

TL;DR: In this article, a silver-loaded TiO2 photocatalyst was prepared by photochemical impregnation method and characterized by transmission electron microscopy (TEM), diffuse reflectance spectra (DRS), photooxidation of phenol and photoreduction of Cr(VI).

TL;DR: In this article, the effects of doping noble metal onto RE 0.6 Zr 0.4-x Y x O 2 (RE = Ce, Pr; x = 0.05) solid solutions have been investigated using X-ray diffraction (XRD), temperature-programmed desorption (TPD), temperatureprogrammed reduction (TPR), O 2 -H 2 and O 2-CO titration, 18 O/ 16 O isotope exchange, CO pulsing reaction, and XPS techniques.

TL;DR: In this article, the authors developed novel catalysts for gasification of biomass with much higher energy efficiency than conventional methods (non-catalyst, dolomite, commercial steam reforming Ni catalyst).

TL;DR: In this article, the authors identify limiting factors bearing on the chemistry and catalysis in low pressure operation of diesel fuel in the ultralow sulfur regime and show that certain bulk metal sulfides are intrinsically active and selective for desulfurizing 4-substituted and 4,6-disubstitution dibenzothiophenes.

TL;DR: In this paper, a mesoporous (MCM-41), microporous (β-zeolite) and pillared structure (montmorillonite) supported catalysts were used for semiconductor photocatalysis.

TL;DR: In this paper, the catalytic properties of CuO/CeO 2 catalysts were investigated for CO oxidation reaction and the catalysts prepared by co-precipitation exhibited the highest catalytic activity in CO oxidation with CO total conversion at 85°C.

TL;DR: In this paper, a Pt-deposited carbon nanotube (CNT) showed higher performance than a commercial PDE with reducing 60% Pt load per electrode area in polymer electrolyte fuel cells (PEFCs) below 500 mA/cm 2.

TL;DR: In this article, the Urea gelation/co-precipitation (UGC) method was used for the preferential oxidation of CO in H2 in reformate-type gas mixtures.

TL;DR: A co-precipitation method was employed to prepare nickel oxide dispersed on CeO 2, ZrO 2 and cubic Ce 0.8 Zr 0.2 O 2 support to obtain catalysts useful for carbon dioxide reforming of methane reaction.

TL;DR: In this paper, the impacts of CO2 and H2O on NOx adsorption were investigated, since these species are believed to be competing for the same adorption sites as NOx.

TL;DR: In this article, a series of Pt-Ba/Al2O3 NOx storage-reduction (NSR) catalysts having different Ba loadings (in the range 0-30%, w/w) have been prepared, characterized and tested in the NOx adsorption-Reduction under realistic operating conditions.

TL;DR: In this article, the selective catalytic oxidation (SCO) of NH3 was studied over various γ-Al2O3-supported gold-based catalysts at 2% NH3+2% O2 (balance He).

TL;DR: The use of CO2 (biological/chemical/technological) is the only technology that may contribute to reducing the atmospheric loading while generating a profit as mentioned in this paper, and some options that may find an early industrial application are considered, and barriers that need to be overcome for their full implementation are analyzed.

TL;DR: In this paper, the performance of catalytic conversion of methanol to hydrocarbons of gasoline range has been studied over HZSM-5, ZnO/HZ SM-5 (Si/Al = 45) catalyst, and CuO/ZnO+HZSM−5 catalyst.

TL;DR: In this paper, the results for the desulfurization of diesel by an oxidation and extraction (O/E) scheme were presented, where a diesel with 320ppmw of total sulfur was employed to evaluate the elimination of sulfur compounds.

TL;DR: In this paper, the authors proposed two general routes: (1) carbon (coke) removal as a product having a low atomic hydrogen/carbon ratio and, at the same time, to produce overhead material (distillate) having a high atomic hydrogen /carbon ratio; and (2) hydrogen addition by a hydrocracking/hydrogenolysis mechanism by which the yield of coke is reduced in favor of enhanced yields of liquid products.

TL;DR: In this article, ZSM-5 zeolites with similar Si/Al ratio were synthesized successfully using various templates (n-butylamine (BTA), ethylamine, isopropylamine(IPA), ethylenediamine (EDA), ethanol (ETL), ethanol-ammonium(ETL) and no template (NT)) under hydrothermal conditions.

TL;DR: The catalytically active centers of the MoVNbTeOx system for propane ammoxidation to acrylonitrile have been identified in this paper, where the catalytic system is comprised of three crystalline phases: orthorhombic Mo7.8V1.33Te1.94O28.9 (M1) (Pba2: a=21.1337-A; b=26.6440 -A; c=4.01415 -A, z=4), pseudo-hexagonal Mo4.

TL;DR: In this paper, the authors used tetraethylorthosilicate (TEOS) and 3-aminopropyltriethoxysilane (APTES), 3-mercaptopropyltrimethoxylynne (MPTMS), phenyltrinethoxymethylthoxyselane (PTMS), vinyltrieethoxisilane(VTES), and 4-triethoxyll)butyronitrile (TSBN) as support materials for enzyme penicillin G acylase

TL;DR: In this article, a review focusing on the plasma-chemical kinetics is given, where the effects of plasma treatment can be excitation of molecules, formation of short-lived radicals, forming of long-lived intermediate species, emission of UV-radiation, or simply gas heating.

TL;DR: In this article, a good combined adsorbent/catalyst dual functional system for the control of the low concentration VOC, both adsorption and catalytic activity test over metal-loaded zeolite HY were carried out.

TL;DR: In this paper, extensive experimental research on steam reforming of methane using barrier discharges with/without Ni/SiO2 catalyst was described, which showed chemical activity at 400°C in the presence of barrier discharge.

TL;DR: In this paper, a novel hydrogen generation method for proton exchange membrane fuel cell (PEMFC) is developed, where carbon-supported platinum catalysts were synthesized by an impregnation method, and adopted to catalysis hydrolysis of NaBH4 solution.

TL;DR: In this article, the microstructure and oxidation behavior of soot from the raw exhaust of a Euro IV test heavy duty diesel engine is investigated and compared to that of spark discharge soot and hexabenzocoronene (HBC, C42H18).

TL;DR: In this article, various solgel procedures and post-treatments were applied to modify the distribution of Cu on the surface of Cu/TiO 2 catalysts in order to increase the production of methanol in the photoreduction of CO 2.

TL;DR: A multifunctional composite material, titanium dioxide covered with apatite, has been developed for application in air purification and as an antimicrobial, antifungal, and antifouling coating.