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Heat storage material for process for preparing propylene by propane dehydrogenation and preparation method of heat storage material

A technology for heat storage materials and propane, applied in the direction of heat exchange materials, chemical instruments and methods, hydrocarbons, etc. The reduction can not be very uniform and other problems, to achieve the effect of low cost, reduce device energy consumption, and improve selectivity

Inactive Publication Date: 2021-05-18
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the difference in bed pressure drop caused by inconsistent loading of fixed bed catalysts or the material flow caused by incompletely symmetrical process piping layout, the temperature distribution and temperature drop of the fixed bed bed are generally not very uniform, which seriously affects the service life of the catalyst and propylene. product yield

Method used

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  • Heat storage material for process for preparing propylene by propane dehydrogenation and preparation method of heat storage material
  • Heat storage material for process for preparing propylene by propane dehydrogenation and preparation method of heat storage material
  • Heat storage material for process for preparing propylene by propane dehydrogenation and preparation method of heat storage material

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Experimental program
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Effect test

Embodiment 1

[0020] Preparation of 20wt% CuO / SiO by Impregnation 2 Heat storage material, weigh a certain amount of copper nitrate according to the chemical formula, dissolve it in deionized water, stir it for 25 minutes, and add it to the columnar SiO 2 In the carrier, the solution was evaporated to dryness at 80°C with stirring, and the obtained material was dried overnight in an oven at 100°C. After drying, the heat storage material was calcined in a muffle furnace at 600° C. for 3 hours.

Embodiment 2

[0022] Preparation of 10wt% CuO / SiO by impregnation method 2 Heat storage material, weigh a certain amount of copper nitrate according to the chemical formula, dissolve it in deionized water, stir it for 25 minutes, and add it to the columnar SiO 2 In the carrier, the solution was evaporated to dryness at 80°C with stirring, and the obtained material was dried overnight in an oven at 100°C. After drying, the heat storage material was calcined in a muffle furnace at 1000° C. for 3 hours.

Embodiment 3

[0024] Preparation of 10wt% Co by impregnation 3 o 4 / Al 2 o 3 Heat storage material, according to the chemical formula, take a certain amount of cobalt nitrate and dissolve it in deionized water, stir it for 25 minutes, then add it to the columnar Al 2 o 3 In the carrier, the solution was evaporated to dryness at 80°C with stirring, and the obtained material was dried overnight in an oven at 100°C. After drying, the heat storage material was calcined in a muffle furnace at 1000° C. for 3 hours.

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Abstract

The invention discloses a heat storage material for a process for preparing propylene through catalytic dehydrogenation of propane and a preparation method of the heat storage material.The heat storage material is a supported composite metal oxide xMaOb / carrier, M is one or more of Ba, Mg, Mn, Zr, Ca, Ce, Bi, Cu, Co, Mo, Fe, Ni, Na, Nb and Sb, a is equal to 1-3, b is equal to 1-3, x is the loading amount of the composite metal oxide, and the value of x is 10-30 wt%. The synthesized heat storage material is mixed with a catalyst to be used in a reaction process for preparing propylene through the catalytic dehydrogenation of the propane, and thus, the selectivity can be improved under the condition that the conversion rate of the catalyst is not changed, heat is released in a reduction stage and an air regeneration stage, and bed temperature distribution is more uniform; and the heat storage material is expected to prolong the service life of the catalyst in industrial application reduce regenerated air inlet temperature or regenerated air flow and reduce energy consumption of a device.

Description

technical field [0001] The invention aims at a propane catalytic dehydrogenation process, relates to a high-performance heat storage material for improving the temperature distribution of a catalyst bed in a fixed-bed reactor and increasing product yield and a preparation method thereof, and belongs to the field of chemical industry. Background technique [0002] Propylene is an important petrochemical basic raw material second only to ethylene, and is widely used in the production of polypropylene, butanol, acrylonitrile, propylene oxide, epichlorohydrin, acetone, acrylic acid, etc. At present, propylene mainly comes from ethylene co-production and catalytic cracking. In recent years, the development speed of propylene in my country has gradually surpassed that of ethylene. In 2017, the average annual growth rate of my country's propylene equivalent demand reached 7.6%, exceeding the growth rate of propylene production capacity. From the perspective of equivalent demand, th...

Claims

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Application Information

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IPC IPC(8): C09K5/14C07C5/333C07C11/06
CPCC07C5/333C07C5/3332C07C2523/26C09K5/14C07C11/06Y02P20/52
Inventor 杨维慎楚文玲李洪波王宏奎刘延纯
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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