Showing papers by "Giuseppe Barbieri published in 2003"
TL;DR: In this paper, a thin MFI zeolite membrane was synthesized on a porous α-Al 2 O 3 tubular support by in situ nucleation and secondary growth, which combines high permeances (1.6-8.0μmolm −2 ǫs −1 Ã −1 ) and also good separation properties (the H 2 /SF 6 permselectivity value is equal to 24 at room temperature).
124 citations
TL;DR: In this article, a Pd-based membrane reactor (MR) was used to evaluate the equilibrium conversion of dehydrogenation reactions such as methane steam reforming (MSR) and water gas shift (WGS).
Abstract: A thermodynamic tool based on the ‘reactor in series method’ was used to evaluate the equilibrium conversion of dehydrogenation reactions such as methane steam reforming (MSR) and water gas shift (WGS) in a Pd-based membrane reactor (MR). The permeation equilibrium, expressed by the equality of the H 2 partial pressure on reaction and permeate sides, was imposed as the further constrain for MR. The equilibrium conversion shift is an increasing function of the sweep factor, which is an index of the extractive capacity of the membrane system. The equilibrium conversion of a MR was analysed as a function of temperature and pressure. It shows the same trend vs. temperature for MR and traditional reactor (TR). On the contrary, pressure play a very important role because it has a different influence on the equilibrium of MR with respect to a TR. In particular, the positive effect on thermodynamic conversion was shown also for the MSR reaction characterised by Δ ν >0.
58 citations
TL;DR: In this article, the authors proposed to use oxygen-enriched air (OEA) instead of air as a blow and gasification agent for coal gasification in the presence of different oxygen/nitrogen mixtures for processing low-quality (high moisture content) coal.
27 citations
TL;DR: In this paper, the influence of membrane gas separation in the maleic anhydride production cycle by direct oxidation of n -C 4 H 10 was analyzed, and the effect of driving force on the membrane system performance was investigated by a simulation study and by experimental tests on three different types of commercial and semi-commercial membranes.
Abstract: The influence of membrane gas separation in the maleic anhydride production cycle by direct oxidation of n -C 4 H 10 was analysed. The CO 2 /CO ratio in the purge stream can be controlled by a two-stage system equipped with polymeric membranes in order to improve the reaction yield and the plant productivity, reducing, at the same time, the n -C 4 H 10 loss in the purge stream. The recovery of the not reacted n -C 4 H 10 and the reduction of the CO 2 release are further advantages due to the introduction of membrane unit in the production cycle with consequential economic and environmental benefits. The effect of driving force on the membrane system performance was investigated by a simulation study and by experimental tests on three different types of commercial and semi-commercial membranes. For its general character, the concept developed in this work can be extended to other selective oxidative processes.
2 citations