Electric Regenerator Heating in Fluidized Bed Olefin Cracking

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Solution Overview

Problem

Conventional circulating fluidized bed catalytic naphtha cracking processes face challenges in producing light olefins with high yield and selectivity, suffer from economic feasibility issues, and contribute significantly to greenhouse gas emissions due to hot spots and catalyst deactivation from additional fuel combustion.

Innovation Solution

A circulating fluidized bed reactor equipped with an electric heating furnace in the regenerator, utilizing resistance heating, to provide uniform temperature distribution and reduce the need for additional fuel, thereby maintaining catalyst activity and reducing emissions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by stationary object

If additional fuel (fuel gas or fuel oil) is supplied to the regenerator to provide sufficient heat for naphtha cracking, then the heat requirement is met, but hot spots occur causing catalyst deactivation and increased greenhouse gas emissions

Engineering Contradiction:

Improveheat supply for naphtha crackingVSAvoidhot spots and greenhouse gas emissions

Core Design Contradiction:

Use of energy by stationary objectVSObject-generated harmful factors

Solution Approach 1:

The patent replaces the mechanical/chemical combustion system with an electric heating system. Specifically, electric heating elements are installed in the regenerator to provide heat for catalyst regeneration, substituting the need for additional fuel combustion. This eliminates hot spots associated with fuel burning and reduces greenhouse gas emissions while maintaining the required heat supply for the cracking process

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the temperature distribution parameters in the regenerator by using electric heating elements that provide uniform heat distribution. This controls the regenerator temperature to maintain optimal conditions for catalyst regeneration without creating localized hot spots that would deactivate the catalyst or increase emissions

Inventive Principle:

Principle #35Parameter changes

2Use of energy by stationary object

If additional fuel is burned in the regenerator to meet heat demand, then energy sufficiency is achieved, but water produced during combustion reduces catalyst activity

Engineering Contradiction:

Improveheat for catalyst regenerationVSAvoidcatalyst activity

Core Design Contradiction:

Use of energy by stationary objectVSReliability

Solution Approach 1:

The patent substitutes electric heating for fuel combustion in the regenerator. Electric heating elements directly heat the catalyst without producing combustion byproducts. This eliminates water vapor generation that would otherwise condense and reduce catalyst activity, maintaining reliable catalyst performance over time

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Object-generated harmful factors

If fuel combustion is used to heat the regenerator, then greenhouse gas emissions increase, but electric heating reduces emissions

Engineering Contradiction:

Improvegreenhouse gas emissionsVSAvoidenergy consumption for heating

Core Design Contradiction:

Object-generated harmful factorsVSUse of energy by stationary object

Solution Approach 1:

The patent replaces the combustion-based heating system with an electric heating system in the regenerator. This substitution eliminates carbon dioxide emissions from fuel combustion while providing the necessary heat for catalyst regeneration, directly reducing the plant's greenhouse gas footprint

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The electric heating furnace ensures a uniform temperature gradient, minimizing hot spots and catalyst deactivation, improving economic feasibility and reducing greenhouse gas emissions while enhancing light olefin production yield.

Implementation Method 1

an electric heating furnace including a heating body is installed in the regenerator

Methodology Applied

Scientific EffectResistance heating: Joule Heating

Implementation Method 2

Heat produced during a process in which the coke reacts with air injected in a regenerator and burns is used as a fuel source

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 3

the coke reacts with air injected in a regenerator and burns

Methodology Applied

Scientific EffectCombustion: Combustion

Data Source

PatentUS12599884B2Circulating fluidized bed reactor using electric heating furnace

Publication Date: 2026.04.14 KOREA RES INST OF CHEM TECH

AI summary

Provided is a process of manufacturing light olefins, which is a fluidized bed catalytic naphtha cracking process having improved economic feasibility and decreased greenhouse gas emissions. The process of manufacturing light olefins according to the present invention has a decreased hot spot occurring when supplying an additional fuel oil and decreased tendency of catalyst deactivation by water, thereby improving economic feasibility of the process and reducing greenhouse gas emissions to allow construction of an environmentally friendly process.