Methanol Delivery and Reforming With Direct Synthesis Stream Integration
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Solution Overview
Problem
Conventional methanol production and reforming processes are energy-intensive, require complex purification steps, and have poor dynamic behavior, especially when using fluctuating renewable energy sources, leading to inefficiencies and limited load range.
Innovation Solution
A process and plant design that integrates methanol synthesis and reforming by directly producing a mixture of water and methanol from carbon dioxide and hydrogen without separation, allowing for minimal purification and storage, and using a conditioning step to achieve a desired water-to-methanol ratio, which includes adding water and removing volatile compounds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional methanol production and reforming processes are used, then hydrogen production is achieved, but energy consumption is high and process complexity increases
Solution Approach 1:
The patent combines methanol synthesis and reforming operations into an integrated process where the methanol synthesis reactor outlet stream is directly fed to the reforming reactor without intermediate separation. This merging of operations eliminates complex purification steps and reduces overall process complexity while improving energy efficiency by avoiding the energy-intensive separation and purification steps required in conventional processes.
Solution Approach 2:
The integrated process serves multiple functions simultaneously: it produces methanol from CO2 and H2, then immediately reformes the methanol to generate hydrogen, and also produces a water-methanol mixture suitable for storage and transport. This multi-functionality reduces the need for separate dedicated units for each operation, simplifying the overall process while maintaining energy efficiency.
2Manufacturing precision
If conventional methanol production processes are used, then methanol is produced, but purification steps become complex and time-consuming
Solution Approach 1:
The patent merges methanol synthesis and reforming into a single integrated flow where the crude methanol stream from synthesis is directly fed to the reforming reactor. By eliminating the intermediate purification and separation steps that would normally be required to isolate pure methanol, the process significantly reduces processing time while still achieving the necessary product quality through the reforming operation.
Solution Approach 2:
The patent converts the normally harmful effect of impurities in crude methanol into a benefit by directly feeding the unpurified stream to the reforming reactor. The reforming process is tolerant of the synthesis byproducts and actually benefits from the water already present in the synthesis stream, which provides the necessary steam for the reforming reaction, thereby eliminating the need for time-consuming purification steps.
3Adaptability or versatility
If conventional processes are used with fluctuating renewable energy sources, then production continues, but dynamic behavior deteriorates and load range is limited
Solution Approach 1:
The patent implements a dynamic process design where the integrated synthesis-reforming system can rapidly adjust to changing feed conditions and energy availability. The direct coupling of synthesis and reforming without intermediate storage or separation allows the process to respond quickly to fluctuations in renewable energy input, maintaining stable operation across a wide load range and improving adaptability to variable operating conditions.
Solution Approach 2:
The process allows for flexible adjustment of operating parameters such as temperature, pressure, and flow rates to accommodate varying energy input from renewable sources. By changing these parameters dynamically, the system maintains reliable operation across different load conditions, extending the usable load range while preserving process stability even when using fluctuating renewable energy sources.
4Manufacturing precision
If water and methanol are separated after synthesis, then pure methanol is obtained, but process complexity and energy consumption increase
Solution Approach 1:
The patent merges the methanol synthesis and reforming operations so that the water-methanol mixture produced in synthesis is directly fed to the reforming reactor without separation. This eliminates the energy-intensive distillation and purification steps that would normally be required to separate water from methanol, significantly reducing energy consumption while still achieving the necessary product quality through the reforming operation.
Solution Approach 2:
The patent converts the normally undesirable presence of water in the methanol synthesis product into a beneficial component for the reforming reaction. The water already present in the synthesis stream provides the steam necessary for the reforming reaction, eliminating the need for additional water addition or energy-intensive separation steps, thereby reducing overall energy consumption while maintaining product purity.
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
Enhances energy efficiency, improves process dynamics, extends the load range, and reduces overall complexity by simplifying the purification process and utilizing favorable storage conditions for the methanol-water mixture.
Implementation Method 1
producing a mixture containing water and methanol from carbon dioxide and hydrogen
Implementation Method 2
subjecting it to one or more reforming steps, wherein the provision of the reforming feed mixture comprises one or more methanol synthesis steps
Implementation Method 3
The removal of the one or more volatile compounds may be carried out using rectification
Implementation Method 4
The stripping can be carried out, as is typical, using stripping gas and obtaining a stripping exhaust gas
Data Source
Figure 1
AI summary
A method (100) for reforming methanol is proposed, in which a reforming feed mixture (14) containing water and methanol is provided and subjected to one or more reforming steps (120). The provision of the reforming feed mixture (14) comprises one or more methanol synthesis steps in which a methanol synthesis product mixture (7) containing water and methanol is formed. The water contained in the methanol synthesis product mixture (7) or a portion thereof and the methanol contained in the methanol synthesis product mixture (7) or a portion thereof are transferred into the reforming feed mixture (14) without separation from one another. A corresponding plant is also proposed.