Preparation method and uses of condensate oil aromatization catalyst

Abstract

The invention discloses a preparation method and application of aromatization catalyst for gas condensate. The method is to load metal active components onto a nano molecular sieve, which comprises 0.1 to 10.0 weight percent of noble metal platinum, 1.0 to 10.0 weight percent of a second metal M, 89.0 to 98.9 weight percent of a carrier, wherein the carrier is composed of 60 to 90 weight percent of a nano HZSM-5 molecular sieve and titanium dioxide, the balance being aluminum oxide, the noble metal platinum is a fist active component. The catalyst is applicable to production of aromatic hydrocarbon through aromatization of gas condensate. With gas condensate as the raw material, benzene, toluene, xylene (BTX) together with a byproduct of 18 to 28 weight percent of high quality liquid gas are produced in a reactor of moving bed under the conditions of a total reaction pressure of between 0.5 and 2.0 Mpa, a temperature of between 400 and 580 DEG C, a weight space velocity of the raw material of between 0.5 and 4.0 h <-1>. The catalyst has high actively and selectivity anti-carbon capacity, reusability and high yield rate of aromatic hydrocarbon products.

Description

technical field [0001] The present invention relates to a preparation method and application of a condensate oil aromatization catalyst, more specifically, a condensate oil molecular sieve-loaded active metal aromatization catalyst and its preparation method, and using the catalyst to A method of aromatization of condensate. Background technique [0002] With the intensified development of petroleum and the large-scale exploitation of condensate oil and gas fields, a large amount of condensate oil products (C 3 —C 12 ), condensate is unfractionated liquid hydrocarbon recovered together with natural gas and oil field gas, it is a mixture of short-chain hydrocarbons and long-chain hydrocarbons, the yield of naphtha is usually 60~80% by weight, and the yield of diesel oil Usually 20~40m%. "West-to-East Gas Pipeline" is a major engineering project being carried out in China at the beginning of the 21st century. A large amount of natural gas condensate oil resources are obtain...

AI Technical Summary

Problems solved by technology

Its shortcoming is that the raw material oil obtains 45-65% (accounting for the raw material oil weight) liquid after the first-stage reaction, the liquid yield is not high, and there are too many cracked products

However, if a fixed bed reactor is used, the aromatization catalyst is easily deactivated due to coke, and multiple reactors need to be connected in series and operated at variable temperatures. At the same time, it will cause frequent switching regeneration or shutdown regeneration of the device, cumbersome operation, and there are products The quality is not stable, especially the dry gas yield increases greatly in the later stage of the product

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