Partial Oxidation of Methane and Tars in Syngas Streams
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Solution Overview
Problem
Conventional syngas cleanup processes face challenges in efficiently converting methane and tars into hydrogen and carbon monoxide, leading to operational issues and high costs due to the need for expensive and maintenance-intensive tar scrubbing systems, and result in reduced carbon conversion to liquid fuels.
Innovation Solution
The method involves using a hot oxygen generator to provide supplemental heat and oxygen for partial oxidation of methane and tars in the syngas stream, enhancing reforming kinetics and converting these species into hydrogen and carbon monoxide, while reducing CO2 levels and optimizing the syngas composition for improved fuel production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If conventional tar scrubbing systems are used to remove tars from syngas, then tar removal is achieved, but the system becomes expensive and maintenance-intensive
Solution Approach 1:
The patent extracts and removes tars and methane from the syngas stream through partial oxidation reactions, converting them into useful hydrogen and carbon monoxide. This extraction approach eliminates the need for complex physical scrubbing systems by chemically transforming the harmful components into valuable products.
Solution Approach 2:
The patent converts harmful tars and methane into beneficial hydrogen and carbon monoxide through controlled partial oxidation. Instead of merely removing these components as waste, the process transforms them into useful syngas constituents that enhance fuel production efficiency.
2Object-generated harmful factors
If conventional syngas cleanup processes are used, then tar and methane removal is achieved, but carbon conversion to liquid fuels is reduced
Solution Approach 1:
The patent converts tars and methane into beneficial hydrogen and carbon monoxide through partial oxidation, thereby increasing the overall carbon conversion efficiency to liquid fuels rather than losing carbon in removal processes.
Solution Approach 2:
The patent changes the chemical composition parameters of the syngas stream by adding hydrogen and carbon monoxide through partial oxidation of tars and methane, optimizing the syngas composition for enhanced liquid fuel synthesis.
3Quantity of substance
If more oxidant is used to convert methane and tars, then hydrogen and carbon monoxide production increases, but oxidant consumption increases
Solution Approach 1:
The patent optimizes oxidant consumption by controlling partial oxidation parameters to convert methane and tars into hydrogen and carbon monoxide, achieving improved syngas composition with reduced oxidant usage compared to complete combustion.
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 increases the efficiency of syngas conversion to liquid fuels, reduces the need for costly CO2 removal, and enhances operational flexibility by allowing for variable heat and oxygen injection, leading to higher hydrogen production and increased biofuel yield with reduced oxidant consumption.
Implementation Method 1
provide supplemental heat and oxygen for partial oxidation of methane and tars in the syngas stream
Implementation Method 2
partial oxidation of methane and tars in the syngas stream, enhancing reforming kinetics and converting these species into hydrogen and carbon monoxide
Data Source
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AI summary
Oxygen is added to a raw syngas stream that contains hydrogen and CO, one or more light hydrocarbons, and that may also contain tars, produced by gasification of carbonaceous feed material, while imparting heat at a rate greater than 125 BTU per pound of oxygen added, to partially oxidize light hydrocarbons and convert tars if present to lower molecular weight products.