Fixed bed reactor for methane oxidative coupling reaction and method for preparing ethylene by methane oxidative coupling

Abstract

The invention belongs to the field of preparation of ethylene by oxidative coupling of methane, and particularly relates to a fixed bed reactor for oxidative coupling reaction of methane and a methodfor preparing ethylene by oxidative coupling of methane. The reactor comprises a reactor shell, and comprises a catalyst bed layer, a plurality of U-shaped heat removal pipe bundles and a high-pressure steam overheating section which are arranged in the reactor shell, wherein the high-pressure steam overheating section is arranged at the lower part of the catalyst bed layer; the catalyst bed layeris divided into an upper layer and a lower layer, the upper layer is a heat-insulating layer, and the lower layer is an approximately isothermal layer; the multiple U-shaped heat removal pipe bundlesare arranged in the approximate isothermal layer, one part of the pipe bundles are used for generating high-pressure saturated steam, and the other part of the pipe bundles are used for overheating the high-pressure saturated steam. The invention provides an ideal reactor and a control scheme which can be implemented industrially, are small in reaction temperature rise, good in heating effect, high in ethylene selectivity and convenient and adjustable in system for the reaction for preparing ethylene through oxidative coupling of methane, and promote industrialization of preparing ethylene through oxidative coupling of methane.

Description

technical field [0001] The invention belongs to the field of ethylene production through oxidative coupling of methane, and more specifically relates to a fixed-bed reactor for oxidative coupling reaction of methane and a method for producing ethylene through oxidative coupling of methane. Background technique [0002] Ethylene is one of the largest chemical products in the world. The ethylene industry is the core of the petrochemical industry. Ethylene products account for more than 75% of petrochemical products and occupy an important position in the national economy. The world has taken ethylene production as one of the important symbols to measure the development level of a country's petrochemical industry. [0003] With the sharp fluctuation of international crude oil prices and technological progress, in order to change the situation that ethylene production raw materials are overly dependent on petroleum resources, the production of ethylene raw materials has changed....

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Problems solved by technology

[0008] In view of the deficiencies in the above-mentioned prior art, the purpose of the present invention is to solve the problem of poor industrial implementation in the prior art, and to provide an industrially implementable, small reaction temperature rise, and heat extraction system for the reaction of oxidative coupling of methane to ethylene. Ideal reactor and control scheme with good effect, high ethylene selectivity, convenient and adjustable system, and promote the industrialization of methane oxidative coupling to ethylene

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