Development of thin Pd–Ag supported membranes for fluidized bed membrane reactors including WGS related gases

On the hydrodynamics of membrane assisted fluidized bed reactors using X-ray analysis

“…The immersed membranes were porous Al 2 O 3 (100 nm pore size at the surface). Each membrane was 20 cm in length and 1 cm in outer diameter sealed to a plastic cap from one side and to a stainless steel Swagelok component (with graphite ferrule) from the other side [6]. At the outlet of the column, the membranes were connected to a 12 mm outlet tube that was connected to a vacuum pump (TRIVAC Leybold LH) with a capacity of 40 ln/min of air, which could be controlled with a Brooks ® mass flow controller (0-44 ln/min) using Labview software.…”

“…increased permeability and perm-selectivity [3,[5][6][7][8][9], whereas for the efficient demonstration of such units it is essential to understand and quantify the reactor design and scale-up parameters that account for the presence of membranes with different permeation values. De Jong et al performed an extensive study on the hydrodynamics of fluidized beds in the presence of horizontally integrated membranes inside a pseudo 2D fluidized bed [10].…”

Process Intensification via Membrane Reactors, the DEMCAMER Project

“…Single gas permeation tests showed H2 permeances (>2.6 × 10 −6 mol•m −2 •s −1 •Pa −1 ) and selectivities (H2/N2 > 10,000) well above the targets of the project. Deep information and characterization of these membranes can be found in the work of Fernandez et al [38,39]. Besides the membranes for the lab-scale tests ( Figure ), 33 membranes of 22-23 cm long (OD 10 mm-ID 7 mm) were delivered for the WGS prototype.…”

“…Thermal cycles for the membrane proved the stability of the sealing method as depicted in Figure . Furthermore, single gas permeation tests showed that the Pd-based membrane gave one of the highest permeances ever reported in the literature. A table with the comparison of different Pd-based membranes investigated in the literature can be found in Fernandez et al [38]. Characterization of the catalyst demonstrated that the addition of Re to the Pt-based catalysts implies a modification in the intrinsic WGS activity and also provides high stability over time.…”

“…Furthermore, single gas permeation tests showed that the Pd-based membrane gave one of the highest permeances ever reported in the literature. A table with the comparison of different Pd-based membranes investigated in the literature can be found in Fernandez et al [38]. First, lab-scale tests were carried out both in PBMR and FBMR, using the catalyst and membranes (thickness 3.6 μm) developed in the project.…”