This review presents the state of the art regarding the possible intensification of desorption processes by use of microwave irradiation. The most important experimental and modeling results reported in the literature on the laboratory scale as well as on the industrial scale were collected in this paper. It follows from the review that microwave heating is a powerful novel method proving many advantages when utilized for regeneration of loaded adsorbents. In general, a short penetration depth could be a drawback of this very efficient heating method. Hence, it seems that the fluidized bed adsorbers are better choice than the fixed-bed ones when the microwave-assisted desorption step is carried out because more homogenous temperature distribution would be guaranteed.

Intensification of desorption processes by use of microwaves—An overview of possible applications and industrial perspectives

Pt-Al 2 O 3 , Al 2 O 3 and SnO 2 were deposited as thin films on a stainless steel support that was inserted into an annular reactor and heated using an electromagnetic induction device. Possibility of an accurate temperature control was demonstrated and heating rates up to 800 °C min −1 were obtained. Total abatement of 1000 ppm isopropyl alcohol (IPA) was achieved at low temperature (T50 about 80 °C) on 1 wt% Pt/Al 2 O 3 . Nevertheless, the strong IPA adsorption on the alumina support and the formation of large amounts of acetone dictated to select the other catalyst, SnO 2 . IPA 90% conversion into CO 2 and H 2 O was then obtained at 250 °C with a total flow of 100 NmL min −1 containing 1000 ppm IPA. Considering the volume of the very thin reactive sheath (hydraulic diameter about 3.6 mm), ghsv was as high as 2.6 × 10 3  h −1 . Total abatement to CO 2 and H 2 O of high amounts of IPA (about 1 vol%) in air was achieved in less than 30 s and near-room temperature was recovered quickly when the contaminant level at the reactor inlet felled again below a given threshold

Novel inductively-heated catalytic system for fast VOCs abatement, application to IPA in air

Atomic Energy of Canada Limited (AECL), a leading integrated nuclear services company and developer of CANDU® reactors, is proactively leveraging its nuclear technology base to support the emerging hydrogen economy. In particular, the heavy water technologies and hydrogen safety expertise developed as part of the CANDU® technology development are being exploited to advance the hydrogen economy. The catalysts developed for hydrogen isotopes separation, for production and processing of heavy water, are equally relevant for the proton exchange membrane type fuel cells. Similarly, the catalytic devices developed for hydrogen mitigation in the nuclear reactors could be useful for safety applications for indoor hydrogen facilities. The new-generation, cost-effective heavy water processes developed by AECL are synergistic with hydrogen production by conventional means-steam-methane reforming and water electrolysis. Consequently, AECL's knowledge base has led to innovative ideas for 'greener' hydrogen production. Recently, AECL is engaged in international collaborations to develop novel technologies for hydrogen production by 'water-splitting'-thermochemical cycles integrated with high-temperature nuclear reactors that are under development as Generation IV systems.

Leveraging nuclear research to support hydrogen economy

Hydrogen separation by dual functional cermet membranes with self-repairing capability against the damage by H2S

This paper continues a series of annual bibliographic updates (data from 1985) of the published literature on selected particulate processes (see Ray 1990–2000). It provides a useful and quick reference source to the journal literature for the year 2000 (taken from the 50 most important chemical engineering journals) for researchers in this area. The references included here have been divided into the following subject groups: theory, design data, adsorbents, PSA and cyclic systems and applications, liquid-phase adsorption ion exchange, chromatography and related separations, membranes and membrane-type separations.Adsorption and related separations for industrial and environmental applications are described in detail in Dabrowski (1999) which also contains extensive bibliographies prepared by this author. A complete bibliographic listing of the chemical engineering journal literature from 1959 to 2000 (with subsequent six-monthly updates) is available on a CD-ROM database*. Full details are available fro...

https://journals.sagepub.com/doi/pdf/10.1260/0263617011494619

Adsorptive and membrane-type separations: A bibliographical update (2000)

A method for the removal of trace quantities (0.2 to 10 ppm) of carbon monoxide in commercial hydrogen using a temperature-swing-adsorption system with 0.5 wt% Pt/Al2O3, adsorbent has been investigated. The adsorbent could be regenerated by treatment with air at 200°C to 250°C or by treatment with hydrogen at 270°C. The breakthrough curves have been described by a model which considers both the external-film resistance and the intraparticle diffusion resistance. The model has been validated at the high gas velocities expected in a commercial plant.



On a etudie une methode pour le retrait de traces d'oxyde de carbone (0.2-10 p.p.m.) dans de l'hydrogene commercial base sur un systeme d'adsorption a balayage de temperature avec un adsorbant contenant 0.5% en poids de Pt/Al2O3. L'adsorbant peut ětre regenere par un traitement a l'air a 200-250°C ou par un traitement a l'hydrogene a 270°C. Les courbes de rupture sont decrites par un modele tenant compte a la fois de la resistance du film exterieure et de la resistance de la diffusion intra-particulaire. Le modele a ete valide aux vitesses de gaz elevees typiques des installations cornmerciales.

Krystyna Marcinkowska

Papers

Removal of trace quantities of co from H2 using temperature‐swing‐adsorption