Integrated Gasification Activated Carbon Production

Solution Overview

Problem

Conventional methods for utilizing waste materials in gasification processes inefficiently convert pyrolysis coke into activated carbon, requiring separate and energy-intensive activation processes, and fail to fully utilize the thermal energy generated during the process.

Innovation Solution

A method involving a three-stage process where pyrolysis gas is generated and used to activate pyrolysis coke in an integrated process, utilizing the thermal energy in the product gas to efficiently produce activated carbon, eliminating the need for external activation gases and reducing energy consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If pyrolysis coke is combusted or removed to provide heat demand for decomposition, then energy supply for the process is improved, but activated carbon production is lost

Engineering Contradiction:

Core Design Contradiction:

Use of energy by moving objectVSLoss of substance

Solution Approach 1:

The patent merges the heat generation function and activated carbon production function into a single integrated process. The pyrolysis coke is simultaneously used as both a fuel source for heat generation and as the raw material for activated carbon production, eliminating the need to choose between these two uses.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The pyrolysis coke serves multiple functions: it acts as fuel for providing heat demand, serves as raw material for activated carbon production, and the generated syngas is used for both energy generation and as activation medium. This multi-functionality resolves the contradiction between energy supply and substance loss.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Manufacturing precision

If separate activation process is used for pyrolysis coke, then activated carbon quality is improved, but energy consumption and process complexity increase

Engineering Contradiction:

Core Design Contradiction:

Manufacturing precisionVSUse of energy by stationary object

Solution Approach 1:

The activation process is merged with the gasification process. The syngas generated during gasification is directly used as the activation medium, and the heat from gasification provides the activation temperature. This eliminates the need for separate activation equipment and external energy input.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The system uses its own by-products (syngas and heat) to perform the activation function. The pyrolysis gas generated during decomposition serves as both fuel and activation medium, making the process self-sufficient and eliminating external energy requirements.

Inventive Principle:

Principle #25Self-service

3Loss of energy

If integrated activation process is implemented, then energy efficiency is improved, but process control complexity increases

Engineering Contradiction:

Core Design Contradiction:

Loss of energyVSDevice complexity

Solution Approach 1:

The integrated process is segmented into distinct functional zones within the reactor: decomposition zone, gasification zone, and activation zone. Each zone operates under optimized conditions and can be independently controlled, making the overall complex process manageable through modular control.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The process maintains continuous operation where pyrolysis coke is continuously converted to activated carbon while simultaneously generating energy. The syngas is continuously used for activation, creating a continuous useful action loop that maximizes energy efficiency while maintaining controllable process parameters.

Inventive Principle:

Principle #20Continuity of useful action

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

This approach enables the simultaneous generation of energy-rich product gas for electricity/heat and activated carbon, improving the efficiency and utilization of carbonaceous starting materials like biomass, with reliable and complete conversion of pyrolysis coke to activated carbon.

Implementation Method 1

thermally decomposing a carbonaceous starting material, in particular biomass, in a first reaction zone, to produce pyrolysis coke and pyrolysis gas

Methodology Applied

Scientific EffectPyrolysis: Pyrolysis

Implementation Method 2

activating at least a portion of the pyrolysis coke to form activated carbon with the aid of the product gas in the third reaction zone

Methodology Applied

Scientific EffectAdsorption: Adsorption

Data Source

PatentUS11834337B2Method and device for producing active carbon

Publication Date: 2023.12.05

AI summary

A method and a device are provided for producing activated carbon in a gasification process. A first process stage includes thermally decomposing a carbonaceous starting material, in particular biomass, in a first reaction zone to produce pyrolysis coke and pyrolysis gas. A second process stage includes generating, from the pyrolysis gas in the second reaction zone, a product gas which can be used for activating the pyrolysis coke. A third process stage includes activating at least a portion of the pyrolysis coke to form activated carbon with the aid of the product gas in the third reaction zone.