Device and method device for evaluating catalyst during preparation of oxalate through three-channel automatic CO gas phase oxidative coupling

Abstract

The invention discloses a device for evaluating a catalyst during preparation of oxalate through three-channel automatic CO gas phase oxidative coupling and a method for evaluating a catalyst by using the device. The device comprises a gas control pipeline system (1), a fixed bed reaction system (2), a four-way valve system (3), a multi-ported valve system (4), a dual-channel gas chromatography system (5) and a product absorbing tank (6), wherein the gas control pipeline system (1) comprises one path of inert gas purging pipeline, one path of carbon monoxide gas pipeline, one path of nitrite ester gas pipeline and one path of nitrogen and argon mixed gas pipeline, the carbon monoxide gas pipeline, the nitrite ester gas pipeline and the nitrogen and argon mixed gas pipeline are same, each path comprises a gas conveying pipeline, a pressure stabilizing valve (7), a pressure meter (11) and a current stabilizing valve (8) which are sequentially connected, a pipeline behind the current stabilizing valve (8) is divided into three branches, and each branch comprises a quantity and flow controller (9) and a switch valve (10). According to the device, three same or different catalysts can be simultaneously evaluated, the developing speed of the catalyst is greatly increased, all-component online real-time analysis of raw materials and products can be realized, and data is accurate and reliable.

Description

technical field The invention belongs to the technical field of catalyst development engineering, in particular to a catalyst evaluation device and a catalyst evaluation method for preparing oxalate by three-channel automatic CO gas-phase oxidation coupling. Background technique Ethylene glycol is an extremely important and strategic bulk chemical raw material. my country's annual demand is more than 10 million tons, while the production capacity is only more than 3 million tons. The contradiction between supply and demand is very prominent, and a large amount needs to be imported. Coal-to-ethylene glycol technology is of great significance for alleviating the contradiction between supply and demand of ethylene glycol in my country and for efficient and clean utilization of coal resources. CO gas-phase oxidative coupling to prepare oxalate is a key step in the conversion of inorganic CO to organic oxalate in coal-to-ethylene glycol technology. The reaction principle of C...

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Problems solved by technology

Aiming at the deficiencies and problems of the existing catalyst evaluation device and catalyst evaluation method for the preparation of oxalate by CO gas-phase oxidation coupling, the present invention provides a three-channel automatic CO gas-phase oxidation coupling preparation of oxalate catalyst evaluation device and The catalyst evaluation method realizes the simultaneous evaluation of the performance of three catalysts, and solves the technical problems existing in the existing evaluation devices and methods: 1. The catalyst development speed is slow; 2. The analysis efficiency is low; 3. The analysis is not synchronized; 4. The equipment large capital investment

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