窗体顶端The present work focuses on the development of efficient desulphurization processes for multi-fuel reformers for hydrogen production. Two processes were studied: liquid hydrocarbon desulphurization and H2S removal from reformate gases. For each process, materials with various chemical compositions and microporous structures were synthesized and characterized with respect to their physicochemical properties and desulphurization ability. In the case of liquid phase desulphurization, the adsorption of sulphur compounds contained in diesel fuel under ambient conditions was studied employing as sorbents, zeolite-based materials, i.e. NaY, HY and metal ion-exchanged NaY and HY, as well as a high-surface area activated carbon (AC), for three different diesel fuels with sulphur content varying between 5 and 180ppmw. Among all sorbents studied, AC showed the best desulphurization performance followed by cerium ion-exchanged HY. The gas phase desulphurization experiments involved the evaluation of zinc-based mixed oxides, synthesized by non-conventional (combustion synthesis) techniques on high steam content reformate gas mixtures.Article Outline1. Introduction2. Experimental 2.1. Materials synthesis and characterization 2.1.1. Sorbents for liquid phase desulphurization2.1.2. Sorption materials for gas phase desulphurization2.2. Experimental procedure 2.2.1. Liquid phase desulphurization2.2.2. Gas phase desulphurization3. Results and discussion 3.1. Liquid phase desulphurization3.2. Gas phase desulphurization4. ConclusionsAcknowledgementsReferencesPurchase$ 31.50673Mathematical modeling of an industrial steam-methane reformer for on-line deploymentOriginal Research ArticleFuel Processing Technology, Volume 92, Issue 8, August 2011, Pages 1574-1586Dean A. Latham, Kimberley B. McAuley, Brant A. Peppley, Troy M. RayboldClose preview| Related articles|Related reference work articles AbstractAbstract | Figures/TablesFigures/Tables | ReferencesReferences AbstractA mathematical model of an industrial steam-methane reformer (SMR) is developed for use in monitoring tube-wall temperatures. The model calculates temperature profiles for the outer-tube wall, inner-tube wall, furnace gas and process gas. Inputs are the reformer inlet-stream conditions, the furnace geometry and material properties of the furnace and catalyst-bed. The model divides the reformer into zones of uniform temperature and composition. Radiative-heat transfer on the furnace side is modeled using the Hottel Zone method. Energy and material balances are solved numerically. The effect of important model parameters on reformer temperature profiles is assessed and the parameters are fit to data from an industrial SMR. At plant rates greater than 85% the model accurately predicts the process-gas outlet temperature, composition, pressure, flow rate and tube-wall temperatures. The adjustable parameters may need to be re-estimated using additional low plant rate data. The model has the capacity to be developed into a more complex model that accounts for classes of tubes associated with different radiative environments.Article Outline1. Introduction2. Mathematical model3. Numerical methods 3.1. Fitting of model parameters using industrial data4. Results and discussion5. ConclusionAcknowledgementsNomenclatureReferencesPurchase$ 41.95Highlights Model developed for industrial top-fired steam-methane reformer. Zone furnace model with 1-D fixed-bed tube model. Adjust parameters to match tube temperatures. Predict temperatures within 95% confidence intervals at high rates. Advanced models possible for wall tubes and center tubes.674Ethanol internal steam reforming in intermediate temperature solid oxide fuel cellOriginal Research ArticleJournal of Power Sources, In Press, Corrected Proof, Available online 18 November 2010Stefan Diethelm, Jan Van herleClose preview| Related articles|Related reference work articles AbstractAbstract | Figures/TablesFigures/Tables | ReferencesReferences AbstractThis study investigates the performance of a standard NiYSZ anode supported cell under ethanol steam reforming operating conditions. Therefore, the fuel cell was directly operated with a steam/ethanol mixture (3 to 1molar). Other gas mixtures were also used for comparison to check the conversion of ethanol and of reformate gases (H2, CO) in the fuel cell. The electrochemical properties of the fuel cell fed with four different fuel compositions were characterized between 710 and 860C by IV and EIS measurements at OCV and under polarization. In order to elucidate the limiting processes, impedance spectra obtained with different gas compositions were compared using the derivative of the real part of the impedance with respect of the natural logarithm of the frequency. Results show that internal steam reforming of ethano