Butadiene Production System with Hydrogen Recycle Loop
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Solution Overview
Problem
Current methods for producing butadiene from ethanol using catalysts result in industrially insufficient yields.
Innovation Solution
A butadiene production system and method involving a gas preparation step to create a mixed gas of hydrogen and carbon monoxide or carbon dioxide, followed by ethanol production using a catalyst, and subsequent butadiene production using a second catalyst, with hydrogen by-products returned to the ethanol production step to optimize the H2/CO ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If butadiene is produced from ethanol using a catalyst, then butadiene can be synthesized, but the yield is not industrially sufficiently high
Solution Approach 1:
The invention changes the chemical parameters of the reaction system by introducing a specific catalyst composition (copper-zinc-aluminum oxide catalyst) and optimizing reaction conditions (temperature of 200-400°C, pressure of 0.5-5 MPa, H2/CO ratio of 0.5-2.0). These parameter changes enable the reaction to proceed with higher efficiency and achieve industrially sufficient butadiene yields.
Solution Approach 2:
The invention uses a composite catalyst material consisting of copper, zinc, and aluminum oxides. This composite catalyst structure provides synergistic effects that enhance the conversion of ethanol to butadiene, achieving both high yield and industrial feasibility. The multi-component catalyst system addresses the limitation of single-catalyst systems.
2Productivity
If hydrogen is returned to the ethanol production device, then the H2/CO ratio is optimized, but the system complexity increases
Solution Approach 1:
The invention implements a feedback mechanism where hydrogen produced in the butadiene production step is returned to the ethanol production step. This feedback loop optimizes the H2/CO ratio in the ethanol synthesis reaction, improving butadiene yield. The feedback principle allows the system to self-regulate and maintain optimal reaction conditions.
Solution Approach 2:
The invention merges the hydrogen production function with the ethanol production function by returning hydrogen to the ethanol production device. This integration allows the system to utilize hydrogen efficiently in the ethanol synthesis step, improving overall productivity. The merging of functions reduces waste and optimizes resource utilization.
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 significantly increases the yield of butadiene production, enhancing the efficiency and productivity of the process.
Implementation Method 1
a gas preparation device that heats raw materials to prepare a mixed gas including hydrogen and carbon monoxide
Implementation Method 2
an ethanol production device that is provided downstream of the gas preparation device and brings the mixed gas including hydrogen and carbon monoxide into contact with a first catalyst to obtain ethanol
Implementation Method 3
a butadiene production device that is provided downstream of the ethanol production device and brings the ethanol into contact with a second catalyst to obtain butadiene
Data Source
AI summary
A butadiene production system and a butadiene production method are provided in which butadiene can be produced with a high yield. The butadiene production system (1) includes: a gas preparation device (10) that heats raw materials to prepare a mixed gas including hydrogen and carbon monoxide; an ethanol production device (12) that is provided downstream of the gas preparation device (10) and brings the mixed gas including hydrogen and carbon monoxide into contact with a first catalyst to obtain ethanol; a butadiene production device (16) that is provided downstream of the ethanol production device (12) and brings the ethanol into contact with a second catalyst to obtain butadiene; and return means (18) for returning hydrogen, which is produced as a by-product in the butadiene production device (16), to the ethanol production device (12). In addition, in the butadiene production method, the butadiene production system (1) is used.