شماره ركورد كنفرانس :
4046
عنوان مقاله :
Palladium-doped silica membrane synthesis on α-alumina support modified by γ-alumina interlayers
عنوان به زبان ديگر :
Palladium-doped silica membrane synthesis on α-alumina support modified by γ-alumina interlayers
پديدآورندگان :
Majidi Beiragh Masoud ma_majidi@sut.ac.ir Sahand University of Technology , Gholizade Atani Ahmad ah_gholizadeh@sut.ac.ir Sahand University of Technology , Rafia Nesa n_rafia@sut.ac.ir Sahand University of Technology , Babaluo Ali Akbar a.babaluo@sut.ac.ir Sahand University of Technology
كليدواژه :
Hydrogen separation , Silica membrane , Palladium , doped , Activated transport
عنوان كنفرانس :
چهارمين كنفرانس بين المللي نوآوري هاي اخير در شيمي و مهندسي شيمي
چكيده فارسي :
In this work palladium doped silica membranes were synthesized on α-alumina supports which were modified by coating γ-alumina layers on their surface. Two different procedures were carried out for synthesizing palladium-doped silica membranes. In the first case four layers of silica-palladium sol were coated (M1), and the latter, two layers of silica sol were coated followed by coating of two layers of silica-palladium sol (M2). XRD spectra confirmed palladium presence within the structure of these membranes. The sealed membranes were tested for single gas permeance of H2, and N2 at room temperature, 100 °C, and 550 °C. Gas permeation tests revealed that no activated transport occurred for M1, as its H2, and N2 permeances, and H2/N2 selectivity decreased with increasing temperature. On the contrary, M2 exhibited different behavior. In this case, H2 permeance increased and N2 permeance decreased with temperature, leading to the formation of activated molecular sieve silica membrane layer on the support.
چكيده لاتين :
In this work palladium doped silica membranes were synthesized on α-alumina supports which were modified by coating γ-alumina layers on their surface. Two different procedures were carried out for synthesizing palladium-doped silica membranes. In the first case four layers of silica-palladium sol were coated (M1), and the latter, two layers of silica sol were coated followed by coating of two layers of silica-palladium sol (M2). XRD spectra confirmed palladium presence within the structure of these membranes. The sealed membranes were tested for single gas permeance of H2, and N2 at room temperature, 100 °C, and 550 °C. Gas permeation tests revealed that no activated transport occurred for M1, as its H2, and N2 permeances, and H2/N2 selectivity decreased with increasing temperature. On the contrary, M2 exhibited different behavior. In this case, H2 permeance increased and N2 permeance decreased with temperature, leading to the formation of activated molecular sieve silica membrane layer on the support.
