Verfahren zum Nachweis eines Produktes im Abstrom eines katalytischen Materials einer Vielzahl von katalytischen Materialien

摘要

Conversion products from a catalyzed gaseous reaction are analyzed by feeding the reactor outlet stream to an adsorbent that is selective for the product to be determined by having at least one property, e.g. visible color change, infrared or ultraviolet absorption, fluorescence, density, temperature, refractive index, pH or conductivity, etc. which changes when in contact with this product. A test apparatus (1) has a thermally conductive, solid cylindrical block (6), of e.g. brass, provided on its upper face with a number of cylindrical recesses (7), arranged in a matrix. Each recess has a bottom outlet bore (8), extending down to a porous plate (21) and providing identical flowrate. The top of the block is covered by a brass lid (10) with inlet connections (17,18). Both the block and the lid have heating/cooling elements (15), inserted in horizontal bores (14), for temperature control. The gaseous test feed is introduced to a distribution chamber (19) via the inlets, simultaneously passes down through the catalyst samples (20), supported on porous frits (16) within the recesses, and down the bores to the plate which contains the absorbent reagent, before leaving the apparatus via a collection chamber and outlet (23). The components of the test apparatus are firmly clamped together, and typically allow operation at -50 degrees to +600 degrees C and 1 mbar to 1000 bar.