Methanol Scrubber Recycle Unreacted Methane
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Solution Overview
Problem
Existing methods for producing methanol are inefficient, requiring complex equipment, high energy consumption, and multiple stages, making them unsuitable for medium and small enterprises, and struggle with heat management and oxygen utilization, leading to reduced conversion efficiency and increased energy waste.
Innovation Solution
A system and method involving a reactor for oxidizing methane with oxygen, followed by a scrubber using a methanol and water absorbent to recycle unreacted methane, with a coolant introduced to inhibit formaldehyde decomposition, allowing for efficient recycling and production of methanol with reduced energy consumption and simplified equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a complicated equipment with multiple stages is used for methanol production, then the purity requirements can be satisfied, but the device complexity and energy consumption increase significantly
Solution Approach 1:
The patent combines multiple functional units into a single integrated reactor system. The reaction zone, heat exchange zones, and separation functions are merged within one reactor structure, eliminating the need for separate equipment for each function and reducing overall system complexity while maintaining product purity
Solution Approach 2:
The reactor is designed to perform multiple functions simultaneously: chemical reaction, heat exchange, phase separation, and product withdrawal. This multi-functionality reduces the number of separate equipment pieces needed and simplifies the overall process while achieving the required manufacturing precision
2Productivity
If high quantities of energy are spent for synthesis gas production and purification, then the conversion efficiency improves, but the energy consumption increases significantly
Solution Approach 1:
The patent converts the harmful effect of the exothermic reaction (excessive heat generation) into a beneficial resource by using the heat to pre-heat reactants and maintain reaction temperature. This internal heat recovery eliminates the need for external energy input while maintaining high conversion efficiency
Solution Approach 2:
The patent utilizes phase transitions (condensation of products from gas to liquid phase) to separate products and recycle unreacted materials. This phase change process enables efficient separation and recycling without requiring additional energy-intensive purification steps
3Productivity
If multiple intermittent stages are used in the process, then the conversion can be optimized, but the loss of time and process complexity increase
Solution Approach 1:
The patent implements a continuous reaction process where reactants continuously flow through the reactor, products are continuously separated, and unreacted materials are continuously recycled. This eliminates intermittent stopping and starting, reducing time loss while maintaining optimized conversion through continuous operation
4Temperature
If the quantity of supplied hydrocarbon-containing gas is reduced to manage heat, then the reaction temperature can be controlled, but the degree of conversion of the hydrocarbon-containing gas decreases
Solution Approach 1:
The patent employs feedback control where the actual reaction temperature and conversion rate are continuously monitored and fed back to adjust the feed gas flow rate and reaction conditions. This enables dynamic optimization to maintain high conversion while controlling temperature within acceptable ranges
5Ease of manufacture
If additional hydrocarbon-containing gas is burned to provide heat for rectification, then the rectification stage can be performed, but the energy waste and device complexity increase
Solution Approach 1:
The system performs self-service by using the heat generated from the main reaction to provide the thermal energy needed for rectification and product separation. This internal heat utilization eliminates the need for external fuel burning and reduces energy waste while maintaining the rectification capability
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 enhances methanol production efficiency by recycling unreacted methane, reducing energy use, and minimizing equipment complexity, while maintaining high selectivity for methanol and formaldehyde production, suitable for various scales of operation including small producers.
Implementation Method 1
a scrubber using a methanol and water absorbent to recycle unreacted methane
Implementation Method 2
a reactor for oxidizing methane with oxygen
Implementation Method 3
with a coolant introduced to inhibit formaldehyde decomposition
Data Source
AI summary
An apparatus and method of producing methanol is provided that reacts a methane-containing gas and an oxygen-containing gas in a reactor to provide a product stream comprising methanol and formaldehyde. The product stream is scrubbed using a process component absorbent. After scrubbing the product stream, unprocessed methane gas is mixed with the methane-containing gas for reprocessing through the reactor while methanol and formaldehyde is sent to a rectification process for removal.