Unlock instant, AI-driven research and patent intelligence for your innovation.

Continuous reaction regeneration system and method of three-stage fluidized bed based on methanol to aromatics

A technology of reaction regeneration and fluidized bed, applied in the direction of chemical instruments and methods, chemical/physical processes, etc., can solve the problems of low process flexibility, difficult aromatization, mismatch, etc., to reduce energy consumption and conversion efficiency High, life-guaranteed effect

Active Publication Date: 2020-09-15
TSINGHUA UNIV
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, alkanes are more difficult to aromatize than methanol, and the required temperature is very high, resulting in a mismatch between the two
At the same time, in order to achieve an effective thermal energy coupling effect, a relatively strict ratio of methanol to alkanes is required, and the process flexibility is not strong

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Continuous reaction regeneration system and method of three-stage fluidized bed based on methanol to aromatics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Catalyst (zinc oxide, copper oxide and ZSM-5, the massfraction of zinc oxide and copper oxide are respectively 3% and 7%.) Add such as figure 1In the system shown, first realize the smooth flow of the catalyst in the system, and then heat up. In an atmosphere that ensures the safety of the system, when the temperature of the first reaction zone 1a in the three-stage fluidized bed 1 of methanol to aromatics reaches 280°C, the methanol-containing reaction zone is introduced from the gas inlet 2 of the three-stage fluidized bed of methanol to aromatics. Raw material (100% methanol), the temperature of the first heat exchanger 5a in the first reaction zone 1a is controlled to be 490°C. The catalyst space velocity was 2 kg methanol / kg catalyst / hour. The gas carries the catalyst to the second reaction zone 1b and the third reaction zone 1c through the first transverse porous distribution plate 3a and the second transverse porous distribution plate 3b, and passes through the ...

Embodiment 2

[0037] Catalyst (zinc oxide, iron oxide, lanthanum oxide, cerium oxide and ZSM-12, the mass fraction of zinc oxide, iron oxide, lanthanum oxide, cerium oxide are respectively 3%, 4%, 0.5% and 2%) are added as figure 1 In the system shown, first realize the smooth flow of the catalyst in the system, and then heat up. In an atmosphere that ensures the safety of the system, when the temperature of the first reaction zone 1a in the three-stage fluidized bed 1 of methanol to aromatics reaches 300 ° C, the methanol-containing reaction zone is introduced from the gas inlet 2 of the three-stage fluidized bed of methanol to aromatics Raw materials (50% methanol, 10% acetone, 4% butene, 5% isopentane, 7% cyclohexane), control the temperature of the first heat exchanger 5a in the first reaction zone 1a to 450°C. The catalyst space velocity was 0.2 kg methanol / kg catalyst / hour. The gas carries the catalyst to the second reaction zone 1b and the third reaction zone 1c through the first tr...

Embodiment 3

[0041] Catalyst (gallium oxide, tungsten oxide and ZSM-5, the mass fraction of gallium oxide and tungsten oxide is 1% and 5% respectively) is added as figure 1 In the system shown, first realize the smooth flow of the catalyst in the system, and then heat up. In an atmosphere that ensures the safety of the system, when the temperature of the first reaction zone 1a in the three-stage fluidized bed 1 of methanol to aromatics reaches 290 ° C, the methanol-containing reaction zone is introduced from the gas inlet 2 of the three-stage fluidized bed of methanol to aromatics. Raw materials (70% methanol, 30% C 4 -C 6 non-aromatic hydrocarbons), the temperature of the first heat exchanger 5a in the first reaction zone 1a is controlled to be 470°C. The catalyst space velocity was 10 kg methanol / kg catalyst / hour. The gas carries the catalyst to the second reaction zone 1b and the third reaction zone 1c through the first transverse porous distribution plate 3a and the second transvers...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a continuous reaction regeneration system based on a methanol-to-aromatics three-stage fluidized bed and a method in the technical field of the chemical technological process and equipment. The system comprises the methanol-to-aromatics three-stage fluidized bed (which is provided with first, second and third reaction zones from bottom to top, in which temperature control is respectively carried out to complete methanol aromatization, light dydrocarbon aromatization and alkene alkylation functions) and a two-stage fluidized bed (which is provided with first and second regeneration zones from bottom to top, in which temperature control is respectively carried out) for catalyst regeneration; a connection relationship between the three-stage fluidized bed and the two-stage fluidized bed is that after a catalyst in the three-stage fluidized bed is deactivated, the catalyst enters the second regeneration zone of the two-stage fluidized bed for catalyst regeneration from the first reaction zone, and after regeneration is carried out, the catalyst is returned to the second reaction region of the three-stage fluidized bed from the first regeneration zone; and the system and the method which are disclosed by the invention have the characteristics of high methanol conversion rate, high aromatics yield and simplicity for temperature control.

Description

technical field [0001] The invention belongs to the technical field of chemical process and equipment, and specifically relates to a fluidized bed reaction regeneration system for producing aromatics from methanol, the structure and method of a reactor and a regenerator. Background technique [0002] Methanol aromatization technology is an emerging aromatics production process. It uses methanol as the main raw material and generates aromatics (mainly benzene, toluene, xylene, trimethylbenzene, etc.) )the process of. The product is controlled by the double-pool hydrocarbon mechanism in the molecular sieve. The primary products include the above-mentioned aromatics, and small molecular olefins and alkanes, resulting in a low primary yield of aromatics. It has been reported that the above products are separated and transformed separately. However, when alkanes are transformed into aromatics again, it is a high-temperature, strong endothermic reaction, and the energy consumpti...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B01J8/26
CPCB01J8/26
Inventor 骞伟中陈兆辉侯一林宋文龙杨逸风
Owner TSINGHUA UNIV