MTO reaction kinetic model, MTO reaction regeneration integrated model and application thereof

Abstract

The invention relates to an MTO reaction kinetic model, an MTO reaction regeneration integrated model and an application thereof. The construction method of the MTO reaction kinetic model comprises the following steps: dividing a reaction system into a plurality of lumped components; determining a reaction network and a reaction kinetic equation according to a reaction mechanism among the lumped components, wherein the lumped component comprises methanol, methane, ethane, ethylene, propane, propylene, C4, C5 and above, hydrogen, carbon monoxide, carbon dioxide, and coke. The MTO reaction regeneration integrated model comprises a reactor model, a regenerator model and a catalyst circulating material balance model. The model can reflect the reaction process of the MTO reaction more fully, truly, accurately and reliably; the MTO reaction regeneration integrated model fills up the blank that the existing MTO lumped model lacks application of a regenerator and a catalyst model in actual industrial production, and provides a comprehensive model for whole-process monitoring and optimization of MTO reaction.

Description

technical field [0001] The invention relates to the field of chemical industry, 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 technol...

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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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