Combined Reaction System for NH Decomposition and CO Methanation Using Hydrogen Permeable Membrane Reactor in 1D Model Analysis.

In a previous study, we developed an integrated reaction system combining NH decomposition and CO methanation within a membrane reactor, significantly enhancing reactor performance through efficient H separation. Ru/Ba/γ-AlO and Ru/ZrO were employed as catalysts for each reaction. To ensure the accuracy and reliability of our results, they were validated through 1D models using FlexPDE Professional Version 7.

Effect of Co-existing gases on hydrogen permeation through a Pd82-Ag18/α-AlO membrane during transient start-up.

The work aimed to study the influence of co-existing gaseous mixture (H-N-CO-CO) on hydrogen permeation through the counter-current flow of a Pd82-Ag18/α-AlO membrane during transient start-up at 350 °C and atmospheric pressure. The membrane was operated for an 8-h. Its performance was measured in terms of hydrogen flux and recovery.

Promoting dry reforming of methane bifunctional NiO/dolomite catalysts for production of hydrogen-rich syngas.

Extensive effort has been focused on the advancement of an efficient catalyst for CO reforming of CH to achieve optimum catalytic activity together with cost-effectiveness and high resistance to catalyst deactivation. In this study, for the first time, a new catalytic support/catalyst system of bifunctional NiO/dolomite has been synthesized by a wet impregnation method using low-cost materials, and it shows unique performance in terms of amphoteric sites and self-reduction properties. The catalysts were loaded into a continuous micro-reactor equipped with an online GC-TCD system.

Hydrophobic *BEA-Type Zeolite Membranes on Tubular Silica Supports for Alcohol/Water Separation by Pervaporation.

Hydrophobic pure-silica *BEA-type zeolite membranes with large pores were prepared on tubular silica supports by hydrothermal synthesis using a secondary growth method and were applied to the separation of alcohol/water mixtures by pervaporation (PV), an alternative energy-efficient process for production of biofuels. Amorphous pure-silica tubular silica supports, free of Al atoms, were used for preparing the membranes. In this study, the effects of the synthesis conditions, such as the HO/SiO and NHF/SiO ratios in the synthetic gel, on the membrane formation process and separation performance were systematically investigated.

Effects of Silica-Particle Coating on a Silica Support for the Fabrication of High-Performance Silicalite-1 Membranes by Gel-Free Steam-Assisted Conversion.

Silicalite-1 membranes with high pervaporation performance were prepared successfully on a silica-particle-coated tubular silica support using a gel-free steam-assisted conversion (SAC) method. The effects of the silica-particle layer formed on the top surface of the silica support and the physical properties of the silica particles themselves on the membrane-formation process were investigated. The silica particles coated served as the additional silica source for growing the silicalite-1 seed crystal layer into the silicalite-1 membrane.

High Water Tolerance of a Core-Shell-Structured Zeolite for CO Adsorptive Separation under Wet Conditions.

Dehumidification in CO adsorptive separation processes is an important issue, owing to its high energy consumption. However, available adsorbents such as low-silica zeolites show a significant decrease in CO adsorption capacity when water vapor is present. A core-shell-structured MFI-type zeolite with a hydrophilic ZSM-5 coated with a hydrophobic silicalite-1 shell layer was applied in CO adsorptive separation under wet conditions.