Selective hydrogen combustion catalyst for use in internal heating of petroleum hydrocarbon cracking stock and use thereof

A technology of petroleum hydrocarbons and catalysts, applied in the field of hydrogen combustion reaction catalysts, can solve the problems of high consumption of hydrocarbon raw materials, achieve the effects of protecting the environment, saving energy, and improving heat transfer effects

Active Publication Date: 2010-10-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the complexity of petroleum hydrocarbon raw materials and hydrocarbon steam cracking process, simply applying the hydrogen selective oxidation catalyst used in the SMART styrene process to the petrol

Method used

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  • Selective hydrogen combustion catalyst for use in internal heating of petroleum hydrocarbon cracking stock and use thereof
  • Selective hydrogen combustion catalyst for use in internal heating of petroleum hydrocarbon cracking stock and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The preparation method of H-type molecular sieve:

[0047] After the original molecular sieve powder was roasted at 550°C to remove the template agent, the ratio of molecular sieve (g) to exchange solution (ml) was 1:10, and NH 4 NO 3 The solution (0.8mol / L) was exchanged in a 90°C water bath for 5 hours, and filtered; the filter cake was exchanged twice with the same amount of exchange liquid as before, filtered, and washed with distilled water until there was no NO in the filtrate. 3 - Existence, drying at 110°C, and calcining at 550°C to obtain H-type molecular sieves.

Embodiment 2

[0049] The raw powder of 5A molecular sieve was processed according to the preparation method described in Example 1 to obtain type H molecular sieve. The molecular sieve and silicon oxide (specific surface area > 200M 2 / g of high-purity silicon oxide) and safflower powder are mixed in proportion, after mixing, add an appropriate amount of dilute nitric acid, and after mixing, extrude into a cylindrical shape with a diameter of 3mm, dry at 120°C and roast at 550°C to obtain 5A molecular sieve and oxidation. Silicon strips. Take a certain amount of cylindrical particles, and use Ca(NO 3 ) 2 The solution impregnated the particles, separated by filtration, dried at 120°C and calcined at 550°C. The calcined particles were immersed in a solution of hydrochloric acid containing chloroplatinic acid, dried at 120°C after taking out, and treated with air at 450°C for 2 hours to obtain catalyst D.

Embodiment 3

[0051] The ZSM-5 molecular sieve raw powder was processed according to the preparation method described in Example 1 to obtain H-type molecular sieve. According to the method described in Example 2, with Mg(NO 3 ) 2 Solution and solution containing chloroplatinic hydrochloric acid. Mg and Pt are impregnated on the cylindrical strip containing ZSM-5 molecular sieve and silicon oxide to obtain catalyst E.

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PUM

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Abstract

The invention discloses a selective hydrogen combustion catalyst for use in the internal heating of a petroleum hydrocarbon cracking stock and use thereof. The catalyst comprises at least one of noble metal platinum and an alkali metal and/or alkaline-earth metal, various molecular sieves with a diameter of less than or equal to 6 and a regular duct structure and an adhesive. In the presence of the catalyst of the invention, a mixed material of the petroleum hydrocarbon cracking stock, the hydrogen and the oxygen can realize a hydrogen combustion internal heating process through a catalyst bed layer so as to raise the temperature of the petroleum hydrocarbon cracking stock and a diluting agent to a temperature required for subsequent cracking reaction.

Description

technical field [0001] The invention relates to a catalyst for hydrogen combustion reaction and its application, in particular to a catalyst for selective hydrogen combustion reaction in the heating process of petroleum hydrocarbon cracking raw materials and its application. Background technique [0002] Due to the high temperature and strong endothermic characteristics of the process of cracking petroleum hydrocarbons to produce light olefins, the cracking of petroleum hydrocarbons requires a large amount of heat to achieve the harsh conditions required for the cracking reaction. The reaction temperature of the steam thermal cracking process currently used in industry is as high as 600-900 ° C. It is guaranteed by burning a large amount of hydrocarbons outside the tubular reactor to indirect external heating; Only 40% of the heat is used as reaction heat; therefore, the traditional steam pyrolysis process faces the problem of huge energy demand and low heat transfer efficie...

Claims

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Application Information

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IPC IPC(8): B01J23/42B01J23/58B01J23/62B01J29/74B01J29/44B01J29/85C10G11/05C10G11/20
Inventor 白杰刘小波张勇张利军陈硕张兆斌
Owner CHINA PETROLEUM & CHEM CORP
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