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Integrated methane autothermal reforming and water gas shift reactors for hydrogen production
No full textReattore catalitico autotermico con profilo di temperatura piatto per la produzione di idrogeno da idrocarburi leggeri
No full textHydrogen production: autothermal reforming of light hydrocarbons coupled with innovative catalysts
No full textStabilization of Co-ferrierite activity by Ag and Mn in lean CH4-SCR of NOx in the presence of water
No full textThe effect of CeO2/ZrO2 ratio on the catalytic activity of Ni/CexZr1-xO2 catalysts for partial oxidation of methane
No full textImproved stability of Co-Ferrierite catalyst by Mn in dry-wet cycles of lean CH4-SCR of NOx
No full textIon-exchanged Co, Mn and Co,Mn-FER zeolite was tested as catalyst for the selective reduction of NOx with CH4 in the
presence of O2 under dry and wet (1 vol% H2O) cycles. Under hydrothermal conditions Co-FER undergoes a progressive loss of
activity, while Co,Mn-FER catalyst shows an increased water resistance. UV-VIS spectra of monometallic and bimetallic catalysts
collected before and after dry–wet catalytic cycles show a change of Co species distribution within the zeolite upon heating and
exposure to water. However, the presence of Mn prevents the decrease in the population of the most active Co2+ site in the
presence of water and stabilises the catalytic activity, as evidenced in 80 h time on stream run
Structured catalytic substrates with radial configurations for the intensification of the WGS stage in H2 production
No full textWeight and size reduction of fuel processing reactors is one of the key issues in the development of
catalytic H2 production and purification systems for distributed power plants. The search for innovative
solutions is focused on the development of both catalyst formulations and geometries which could help
to achieve an effective process intensification. Precious metals based structured catalysts in form of
monolith or foam prepared from ceramic or metallic substrates could be a viable option to overcome
heat transfer limitations, which typically characterize these systems. They allow high efficiency of fuel
conversion even at high GHSV, and better stability and durability, a critical issue for industrial WGS
catalysts. In this work we report on the development of an integrated kW-scale system, CH4 fuelled, for
H2 production arranged with an autothermal reforming (ATR) and a WGS stage. Both reactors operated
with noblemetals based structured catalysts. Since in an adiabatic WGS reactor the reaction rates are not
optimized throughout the reactor we employ noble metals foam structured catalysts assembled in such
a way to perform inside the reactor axial or radial gas flow geometry. The aim of the work is to verify the
influence of flow geometry on the reformer performance
Hydrogen production: combination of AR and innovative catalysts starting from light hydrocarbons
No full textAs cations location and coordination affect catalytic activity of Me- exchanged ferrierite in NOx reduction with CH4
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