Construction method of mto reaction kinetic model and mto reaction regeneration integrated model

Abstract

The invention relates to an MTO reaction kinetics model, an MTO reaction regeneration integration model and applications thereof. The construction method of the MTO reaction kinetic model comprises: dividing the reaction system into a plurality of lumped components; according to the reaction mechanism between the lumped components, determining the reaction network and the reaction kinetic equation; the lumped components include: Methanol; Methane; Ethane; Ethylene; Propane; Propylene; Carbon 4; Carbon 5 and above; Hydrogen; Carbon Monoxide; Carbon Dioxide; Coke. The MTO reaction regeneration integrated model includes a reactor model, a regenerator model and a catalyst circulation material balance model. The above model can reflect the reaction process of the MTO reaction more fully, more realistically, more accurately and more reliably; the integrated model of the MTO reaction regeneration fills the gap in the existing MTO lumped model that lacks the application of the regenerator and catalyst models in actual industrial production. Blank, providing a comprehensive model for the whole process monitoring and optimization of MTO reactions.

Description

technical field [0001] The invention relates to the field of chemical engineering, in particular to an MTO reaction kinetic model, an MTO reaction regeneration integration model and applications thereof. Background technique [0002] Methanol to olefins (MTO) is an important coal chemical production process. Methanol to olefins is based on methanol produced from coal or natural gas, and methanol is dehydrated under catalyst conditions to produce light olefins. In the MTO reaction process, in addition to the main reaction of converting methanol into olefins, the low-carbon olefin products are further generated on the catalyst through various complex reactions such as isomerization, oligomerization, cracking, and hydrogen transfer to generate alkanes, olefins, and carbon deposition. The secondary reaction, thus affecting the selectivity of light olefins in the MTO process. [0003] At present, there are many researches on catalysts, reaction characteristics, and process tech...

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Problems solved by technology

[0008] (1) The correlation of laboratory data is poor, and the practicability of the model has not been further verified

The currently adopted 8-lump and 5-lump reaction kinetic models have achieved certain accuracy in the verification of laboratory data, but there are large errors in the calculation and prediction used in actual industry

[0009] (2) The study of the secondary reaction in the reaction process is ignored, resulting in errors in the prediction of product distribution due to deviations in reaction time

[0010] (3) There is no modeling method proposed for the cycle operation of regenerator and catalyst

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