Modeling method of medium-temperature coal tar total-fraction hydrogen cracking lumping kinetic model

Abstract

The invention relates to a modeling method of a medium-temperature coal tar total-fraction hydrogen cracking lumping kinetic model. The method includes the steps of a, dividing hydrogen cracking reaction virtual lump components; b, fundamentally assuming the hydrogen cracking lump kinetic model; c, building a hydrogen cracking overall reaction network; d, building a hydrogen cracking lump reaction kinetic model; e, determining the kinetic parameters of each reaction, and selecting a target function; f, verifying the extrapolation performance and predication capacity of the built medium-temperature coal tar total-fraction hydrogen cracking lump kinetic model according to experimental comparison. The method has the advantages that six lump kinetic models are built for the medium-temperature coal tar total-fraction hydrogen cracking reaction process, experimental verification shows that relative error of model prediction results is smaller than 3%, so that the model is good in explanation and prediction capacity on the medium-temperature coal tar total-fraction hydrogen cracking reaction process.

Description

technical field [0001] The invention relates to the field of coal tar, in particular to a modeling method for a lumped dynamics model of full-fraction hydrocracking of medium-temperature coal tar. Background technique [0002] With the shortage of oil resources in the world and rising prices, the search for alternative energy sources has attracted widespread attention. Facing the resource situation of "rich coal and little gas", China is facing more severe energy problems. China produces a large amount of coal tar in the process of coal pyrolysis every year, except for a small amount for the extraction of chemical products, most of which are used for direct combustion, resulting in a great waste of resources and environmental pollution. Therefore, the development of coal tar hydrogenation to produce clean liquid fuel technology has urgent practical significance for our country. [0003] The idea of ​​lumped kinetics is to summarize the complex reaction system into several ...

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Problems solved by technology

Through verification, this division method can better predict and explain the test, but after further research and analysis, this method also has shortcomings such as small scope of application and unobvious research objects.

For the lumped division of coal tar hydrocracking virtual components, the general method is to divide according to the distillation range. However, in the study of lumped kinetics of whole-fraction hydrogenation, the characteristics of wide fractions of medium-temperature coal tar make this division method difficult, and Coal tar contains a large number of different types of hydrocarbons and non-hydrocarbons, and the classification of heteroatoms does not reflect the main research objects

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