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Feed gas distributor, reactor and method for preparing gasoline through hydrogenation of carbon dioxide

A kind of raw gas, distributor technology

Pending Publication Date: 2022-05-13
珠海市福沺能源科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] To solve the current catalyst catalytic CO 2 The application provides a new reactor for the problems of high heat release and uneven distribution of catalyst bed temperature in the hydrogenation of gasoline

Method used

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  • Feed gas distributor, reactor and method for preparing gasoline through hydrogenation of carbon dioxide
  • Feed gas distributor, reactor and method for preparing gasoline through hydrogenation of carbon dioxide
  • Feed gas distributor, reactor and method for preparing gasoline through hydrogenation of carbon dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0098] Raw gas distributor adopts such as figure 1 The feed gas distributor shown is made of Φ12 stainless steel tube, with 8 holes in each row and a total of 6 rows of holes, and each row is staggered up and down. The specific hole diameter and spacing are as follows: figure 1 shown. In this embodiment, three feed gas distributors are placed.

[0099] The catalyst in the reactor is filled with multi-layer catalyst ceramic balls (the dilution ratio of iron-based catalyst and ceramic ball is 1:5, and the dilution ratio of molecular sieve catalyst and ceramic ball is 2:1), and the iron-based catalyst is Na-Fe 3 o 4 , the dosage is 10g, the mass ratio of iron-based catalyst to acidic molecular sieve is 1:2, and HZSM-5 is used for acidic molecular screening (silicon-aluminum ratio is 180). At the same time, the reactor with raw material distributor and two-stage heat conductor (attached figure 2 ). In this system, raw gas (CO 2 24vol%, H 2 72vol%, 4vol%N 2 ) enters the g...

Embodiment 2

[0109] The operation is the same as in Example 1, the difference is that the number of feed gas distributors in the reactor is changed from 3 to 10, and the raw material distributors include four rows of holes in total, and the apertures of the first outlet holes and the second outlet holes are respectively 0.7mm and 0.5mm, the spacing is 0.7cm; the diameter of the third exhaust hole and the fourth exhaust hole are both 0.4mm, the spacing is 1.5cm, and the spacing between the second row and the third exhaust hole is 1.0cm; the fourth The apertures of the exhaust holes are all 0.2mm, and the spacing is 2.0cm. .

[0110] Table 2 shows that in the reaction time of nearly 1000 hours of operation, the reactant CO 2 The conversion rate and gasoline product yield.

[0111] Table 2

[0112]

[0113] The reaction results show that in this reactor, during the reaction time of nearly 1000 hours of operation, the reactant CO 2 The conversion rate and gasoline product yield are basi...

Embodiment 3

[0115] The operation is the same as in Example 1, except that the number of porous sub-plates in the first-stage reaction zone is adjusted from 1 to 4, and the distance between the first exhaust hole group of the raw material gas distributor and the top of the raw material gas distributor accounts for the total length of the distributor by 3 / 4 adjusted to 1 / 8.

[0116] Table 3 shows that in the reaction time of nearly 200 hours of operation, the reactant CO 2 The conversion rate and gasoline product yield.

[0117] table 3

[0118]

[0119] The reaction result shows that in this reactor, in the reaction time of 200 hours of operation, the reactant CO 2 The conversion rate and gasoline product yield are basically stable, the temperature distribution of the catalyst bed is uniform (310-335 ℃), and no obvious hot spots appear.

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Abstract

The invention discloses a feed gas distributor, a reactor comprising the feed gas distributor and a method for preparing gasoline by catalyzing CO2 hydrogenation. The feed gas distributor comprises a shell I, and a columnar cavity is defined by the shell I; the shell is provided with a plurality of air hole sets in the axial direction. Each air hole group comprises a plurality of exhaust air holes which are formed in the circumferential direction; the distance between every two adjacent air hole groups is set from top to bottom in the axial direction according to a preset mode I; the hole diameters of the exhaust air holes in every two adjacent air hole sets are also set from top to bottom in the axial direction according to a preset mode II. The feed gas enters the reactor more reasonably, and obvious hot-spot temperature is prevented from occurring in the reaction of a catalyst bed layer. The invention also discloses a reactor containing the raw material distributor, a heat conduction device and the raw material distributor, and the reactor is used for catalyzing CO2 hydrogenation to prepare gasoline, so that reaction heat is ensured to be uniformly distributed in a catalyst bed layer and can be uniformly removed, and the reaction is ensured to be stably carried out, safe and efficient.

Description

technical field [0001] The present application relates to a feed gas distributor, a reactor containing it and a catalytic CO 2 The invention relates to a method for preparing gasoline through hydrogenation, which belongs to the field of catalytic synthesis. Background technique [0002] As an important process of carbon dioxide conversion and utilization, carbon dioxide conversion to gasoline is not only conducive to the reduction of carbon dioxide emissions, but also conducive to the effective utilization of carbon dioxide resources, and will also play an important role in the future energy system. But due to CO 2 The chemical inertness of carbon dioxide is different from the hydrogenation of carbon dioxide into low-carbon compounds such as methane and methanol. CO 2 The conversion of hydrogenation into high-carbon compounds such as gasoline is extremely challenging, and the development of efficient catalyst systems and the design of reasonable reactors and process flows ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/02B01J8/04B01J8/06C10G2/00
CPCB01J8/0278B01J8/06B01J8/0446B01J8/0449B01J8/067C10G2/34C10G2/341C10G2300/10C10G2400/02
Inventor 葛庆杰侯守福位健孙剑
Owner 珠海市福沺能源科技有限公司