Method for preparing palladium membrane module and application of palladium membrane module to reactor used for preparing hydrogen from methanol

Abstract

The invention discloses a method for preparing a palladium membrane module and application of the palladium membrane module to a reactor used for preparing hydrogen from methanol. The method for preparing the palladium membrane module is to plate two sides of a structural support body with a layer of a palladium alloy membrane and a layer of a methanol-to-hydrogen catalyst membrane respectively byusing an electroless plating manner. The reactor used for preparing hydrogen from methanol comprises a cover plate I, a heat exchanger I, a reforming combustion chamber, a heat exchanger II, an evaporator and a cover plate II, wherein the heat exchanger I, the reforming combustion chamber, the heat exchanger II and the evaporator are sequentially overlapped and are then placed between the cover plate I and the cover plate II; the reforming combustion chamber is composed of a plurality of partition plates and a plurality of reforming combustion plates, and the partition plates and the reforming combustion plates are arranged repeatedly and alternately; and the evaporator is composed of a plurality of partition plates and a plurality of evaporation plates, and the partition plates and the evaporation plate are arranged repeatedly and alternately. The reactor of the invention has good heat mass transfer effect, uniform catalyst temperature at each position, small heat loss and high hydrogen yield.

Description

technical field [0001] The invention belongs to the technical field of hydrogen production from methanol, and in particular relates to a manufacturing method of a palladium membrane module and its application in a hydrogen production reactor from methanol. Background technique [0002] Hydrogen is an element with abundant reserves and high combustion calorific value on the earth. After burning, only water will be produced without any other pollution products. It is the cleanest energy source. Therefore, hydrogen energy is also called the ultimate energy source for mankind. A hydrogen fuel cell is a device that converts chemical energy directly into electrical energy without going through the Carnot cycle of hydrogen and oxygen, and the energy conversion efficiency can reach more than 60%. The emergence of fuel cell technology makes hydrogen the best energy source to replace fossil energy. In recent years, with the development of proton exchange membrane fuel cells, especial...

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Problems solved by technology

However, in the existing methanol reforming hydrogen production reactor, the heat and mass transfer effect of the reactor is poor, the catalyst use efficiency is low, and the heat loss of the overall equipment is large, resulting in large equipment volume and low hydrogen yield, which cannot meet the requirements of mobile hydrogen production

At present, the volume of methanol hydrogen production reactor is large, the main reason is that most of the reactors are sleeve reactors or tubular reactors, these two types of reactors are widely used in industry, the reaction structure is simple, the whole system It is easy to control, but its disadvantage is that the structure is loose and not compact, the heat and mass transfer is poor, and the local temperature of the catalyst in the reactor is uneven, resulting in low catalyst utilization efficiency

At the same time, the temperature of the catalyst in the reactor is not uniform, so that the catalytic temperature of some catalysts is not within its optimal operating temperature window, resulting in low methanol conversion efficiency, incomplete methanol reaction, affecting hydrogen yield, and methanol vapor damages the rear end. Metal membrane hydrogen purifier

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