Allothermal Pyrolysis Degassing for Hydrogen-Rich Synthesis Gas
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Solution Overview
Problem
Current methods for producing hydrogen-containing synthesis gas are limited by the need for specific raw materials, lack of control over gas component ratios, and environmental concerns such as high emissions, which restrict their economic and sustainable use.
Innovation Solution
A method involving an allothermal pyrolysis process in a degassing device that separates organic raw materials into carbon monoxide and hydrogen-rich raw gas and carbon-containing material, followed by a water-gas shift reaction to adjust hydrogen content, using any organic material with adjustable moisture levels, and a gasification system with heat exchangers for efficient energy recovery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional gasification methods are used to produce hydrogen-containing synthesis gas, then energy supply can be achieved, but the raw materials are limited to selected materials such as wood and emissions are high
Solution Approach 1:
The patent changes the fundamental parameter of the gasification process by implementing a two-stage approach: first pyrolysis to separate raw gas from carbon-containing material, then selective gasification of the carbon-containing material. This parameter change enables the use of diverse organic raw materials while controlling emissions through the water-gas shift reaction that converts CO to H2, producing a cleaner synthesis gas with adjustable composition.
2Manufacturing precision
If conventional gasification methods are used, then synthesis gas can be produced, but the gas components cannot be precisely adjusted to required quantities
Solution Approach 1:
The patent segments the gasification process into distinct stages: pyrolysis to produce raw gas and carbon-containing material, followed by separate treatment where the carbon-containing material undergoes controlled gasification with limited air supply. This segmentation allows independent control of each stage, enabling precise adjustment of gas components (CO, H2, CH4) through the water-gas shift reaction while managing process complexity through modular design.
3Use of energy by moving object
If high temperature gasification is used to produce hydrogen-rich synthesis gas, then energy density is improved, but operational stress on equipment increases
Solution Approach 1:
The patent applies preliminary action by first conducting pyrolysis to separate the raw gas from the carbon-containing material before proceeding to gasification. This preliminary separation allows the subsequent gasification stage to operate at optimized temperatures with controlled air supply, reducing thermal stress on equipment while still producing hydrogen-rich synthesis gas through the water-gas shift reaction that converts CO to H2.
4Reliability
If traditional synthesis gas production methods are used, then energy supply can be maintained, but environmental compatibility is poor due to high emissions
Solution Approach 1:
The patent creates an inert atmosphere control mechanism by limiting air supply during the gasification of carbon-containing material, preventing complete combustion and reducing harmful emissions. The controlled oxygen-limited environment promotes the water-gas shift reaction that converts CO to H2, producing a cleaner synthesis gas that maintains energy supply reliability while significantly improving environmental compatibility through reduced CO2 and other emission formation.
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 allows for the production of a high-quality, hydrogen-rich synthesis gas from diverse organic materials with adjustable composition, reducing emissions and operational stress on equipment, thus enhancing energy sustainability and environmental compatibility.
Implementation Method 1
conveying the organic raw material through a degassing device with the addition of heat, whereby the organic raw material is separated at least into a raw gas and a carbon-containing material
Implementation Method 2
Mixing the raw gas with water vapor to form a mixture and carrying out a water-gas shift reaction in which a proportion of carbon monoxide contained in the mixture is reduced and a proportion of hydrogen is increased
Implementation Method 3
Cooling the mixture, wherein the water vapor contained in the mixture is at least partially condensed and the hydrogen-containing synthesis gas is formed, in particular separated
Data Source
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AI summary
A process for producing hydrogen-containing synthesis gas (S), comprising the following process steps: a) providing an organic feedstock; b) conveying the organic feedstock through a degassing device (4) with the addition of heat, whereby the organic feedstock is separated at least into a carbon-containing material (K) and a raw gas (R), wherein the raw gas (R) comprises at least carbon monoxide and hydrogen; c) separately removing the carbon-containing material (K) and the raw gas (R) from the degassing device (4); d) mixing the raw gas (R) with steam (D) to form a mixture (M) and carrying out a water-gas shift reaction, in which the proportion of carbon monoxide contained in the mixture (M) is reduced and the proportion of hydrogen is increased; e) cooling the mixture (M), wherein the steam (D) contained in the mixture is at least partially condensed and the hydrogen-containing synthesis gas (S) is formed.