One key unit operation in oxyfuel power plants is the CO2 purification unit (CPU), expected to be needed in most of oxyfuel installations to reduce the content of non-condensable gases (mainly O2, N2 and Ar), originated from the oxidant excess required for the combustion, air in-leakages and the non-100% purity of the O2 produced in the cryogenic ASU. Auto-refrigerated cryogenic processes are t...

Several reactor configurations have been tested for catalytic propane dehydrogenation employing Pt-Sn/MgAl2O4 as a catalyst. Pd-Ag alloy membranes coupled to the multifunctional Two-Zone Fluidized Bed Reactor (TZFBR) provide an improvement in propane conversion by hydrogen removal from the reaction bed through the inorganic membrane in addition to in situ catalyst regeneration. Twofold process ...

The removal of dilute diethylether (DEE, concentration: 150 ppm) from an air stream (flow rate: 1.0 L min−1) using non-thermal plasma combined with different cordierite-supported catalysts, including Mn, Fe, and mixed Mn-Fe oxides, was investigated. The experimental results showed that the decomposition of DEE occurred in a one-stage reactor without the positive synergy of plasma and supported ...

The combination of catalytic decomposition ammonia and in situ separation hydrogen holds great promise for the use as a clean energy carrier. However, finding optimal catalyst – membrane pair operation conditions have proved challenging. Here, we demonstrate that cobalt-based catalysts can be efficiently used together with Pd-Au based to produce high purity at elevated pressure. Compared conven...

Dispersion and spreading of concentration signals in gas/liquid microreactors is studied with methods of computational fluid dynamics (CFD). It is shown that conventional reactor designs exhibit a broad residence-time distribution due to convective signal dispersion. This result is supported by experiments monitoring the transport of a liquid plug introduced into the microreactor by a microdisp...

The concepts studied during Offset Stream Technology (OST) test were all designed to produce directional jet noise reduction in a separate flow engine configuration by redirecting the fan stream relative to the core stream, creating a thicker fan flow on one side of the jet. Previous studies, conducted at bypass ratios of five or less showed that lower noise levels would result on the thickened...

A simplified model of a direct current arcjet-assisted diamond chemical vapor deposition reactor is presented. The model is based upon detailed theoretical analysis of the transport and chemical processes occurring during diamond deposition, and is formulated to yield closed-form solutions for diamond growth rate, defect density, and heat flux to the substrate. In a direct current arcjet reacto...

A raptd flow-mlectron sandwtch enzyme immunoassay suitabIe for the direct determmatron of proteins m btoIogtcaI sampIes rs described.. ‘The proposed system utihzes fugfify active adenosme deammase-antibody coqugates m conlunctron with a flow-through unmunoreactor and an ammomum ion-sefectrve potentrometnc detector. After appropnate sampfe/.reagent mlectton steps, the enzyme actrvtty bound to th...