CN201684616U - Nest catalyst - Google Patents

Abstract

The utility model discloses a nest catalyst, which is cylindrical in appearance and consists of a honeycomb ceramic carrier (1) and a catalyst (3). Holes (2) with consistent sizes are formed in an inner cavity of the honeycomb ceramic carrier (1), the catalyst (3) is coated on inner surfaces of the holes in the honeycomb ceramic carrier, the cross section of each hole is triangular or square, and the activate metal component in the catalyst (3) is smaller than 5% wt. The nest catalyst mounted above an outlet of a fixed bed reactor and below a main catalyst not only has auxiliary catalyzing and stabilizing functions to catalytic reaction of the main catalyst but also can lead the temperature and the pressure of the outlet area of a reactor tower to generate pulse ripples, thereby being capable of speeding up mass transfer between reacting substances and achieving better catalytic reforming and stabilizing functions of catalysts.

Description

The Bird's Nest catalyst

Technical field

The utility model relates to catalyst, relates in particular to the catalyst that is used for fixing in the bed bioreactor.

Background technology

As everyone knows, various chemical reactions in the fixed bed reaction tower all are to take place in the catalyst layer in tower, but owing to the reasons such as temperature fluctuation in the reaction tower, the temperature difference that makes each several part in the tower, pressure also produce fluctuation, cause chemical reaction in the major catalyst layer, to carry out to such an extent that be not very thorough, or chemical reaction do not meet designing requirement, causes the productive rate of chemical reaction product and product purity all can reduce.

The utility model content

At above-mentioned problems of the prior art, the utility model provides a kind of catalytic reaction to major catalyst to help out, catalytic reaction products is played reformation and firm effect, can improve the product productive rate, also can improve the Bird's Nest catalyst of the purity and the concentration of product simultaneously.

Bird's Nest catalyst appearance described in the utility model is the cylinder bodily form, and it is formed by honeycomb ceramic carrier and the dip-coating catalyst on the internal surface of hole in honeycomb ceramic carrier that inner chamber is formed with the even hole of size, and described hole shape of cross section is triangle or square.

Reactive metal component weight accounts for the catalyst weight ratio less than 5%wt in the described catalyst.

Bird's Nest catalyst described in the utility model is a kind of outlet top that is placed in fixed bed reactors, the cocatalyst of the below of major catalyst, can well play auxiliary catalysis and firm effect on the one hand to the catalytic reaction of major catalyst, simultaneously owing to be in the top of reaction tower outlet, the outlet meeting of reaction tower has a lot of dwindling than body of the tower, will make like this and all can produce pulse ripple at this regional temperature and pressure, thereby the mass transfer between can the accelerated reaction material can make catalyst that better catalytic reforming and firm effect take place.

Described hole density tri-angle-holed or cubic hole is not less than 300 orders, described reactive metal component is Ni2O-Mo2O3 or CoO-Mo2O3 or Ni2O-W2O3-Mo2O3 or CoO-W2O3-Mo2O3 or Ni2O-CoO-W2O3-Mo2O3, and described reactive metal component weight is less than the 5%wt of total catalyst weight.

Aluminium oxide or zirconia content are not less than 80% in the described honeycomb ceramic carrier,

The diameter of described Bird's Nest catalyst: 3mm ± 1,6mm ± 2,9mm ± 2,13mm ± 2,16mm ± 2,19mm ± 2,25mm ± 3

The utility model is owing to be placed in the outlet top of fixed bed reactors, the below of major catalyst, it not only can well play auxiliary catalysis and firm effect to the catalytic reaction of major catalyst, simultaneously can make the temperature and pressure of the exit region of reaction tower all can produce pulse ripple, thereby the mass transfer between can the accelerated reaction material can make catalyst that better catalytic reforming and firm effect take place.

Description of drawings

Fig. 1 is a plan structure schematic diagram of the present utility model,

Fig. 2 is the partial sectional view of Fig. 1.

Among the figure, 1, honeycomb ceramic carrier 2, hole 3, catalyst

The specific embodiment

In Fig. 1 and Fig. 2, employing contains oxidation companion or zirconia percentage by weight and is not less than 80% material and passes through ball milling, mediate, old, refining mud, moulding, typing, oven dry, it is columniform honeycomb ceramic carrier 1 that cutting and high-temperature firing are made profile, described honeycomb ceramic carrier appearance and size is φ 16 * 6mm, honeycomb ceramic carrier 1 inner chamber is formed with hole 2 of uniform size, the shape of cross section in described hole is a triangle, certainly also can be square, hole density is 380 orders, dip-coating has catalyst 3 on the internal surface of hole in this honeycomb ceramic carrier, contain the reactive metal component in the described catalyst, described reactive metal component is Ni2O-Mo2O3, Ni2O-Mo2O3 content is 3.6% of total catalyst weight, certainly also CoO-Mo2O3 or Ni2O-W2O3-Mo2O3 or CoO-W2O3-Mo2O3 or Ni2O-CoO-W2O3-Mo2O3 of reactive metal component.

Claims (1)

1. Bird's Nest catalyst, its profile is the cylinder bodily form, it is characterized in that: described Bird's Nest catalyst is formed by honeycomb ceramic carrier (1) and the dip-coating catalyst on the internal surface of hole (3) in honeycomb ceramic carrier that inner chamber is formed with the even hole (2) of size, and described hole (2) shape of cross section is triangle or square.

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