Amorphous Alloy Catalyst for Syngas Conversion
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Solution Overview
Problem
Current processes for preparing methanol, dimethyl ether, and low carbon olefins from syngas face challenges with low CO conversion, target product selectivity, and carbon availability, particularly due to the limitations of catalysts such as Cu—Zn—Al and Raney Cu catalysts which have low activity and high energy requirements.
Innovation Solution
A process utilizing a catalyst with an amorphous alloy consisting of aluminum and a second component from specific elements or oxides of Group IA, IIIA, IVA, VA, IB, IIB, IVB, VB, VIIB, VIIB, and VIII, and Lanthanide series, which enhances CO conversion, target product selectivity, and carbon availability by optimizing the catalyst composition and reaction conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If Cu-Zn-Al catalyst is used for methanol synthesis, then catalytic activity is maintained, but CO conversion is low and temperature control during reduction is difficult
Solution Approach 1:
The patent changes the preparation method parameters from co-precipitation to mechanical alloying, and uses liquid nitrogen cooling during reduction to precisely control temperature. This resolves the contradiction by achieving high CO conversion through amorphous structure while maintaining simple temperature control via cryogenic cooling.
Solution Approach 2:
The patent creates a composite catalyst system combining Cu-Zn-Al amorphous alloy with specific support materials (alumina, silica, or activated carbon). This composite structure enhances CO conversion while the support materials provide thermal stability during reduction, resolving the temperature control issue.
2Productivity
If Raney Cu catalyst is used, then catalytic activity is improved, but methanol yield is low (10.9%)
Solution Approach 1:
The patent changes the catalyst structure from crystalline (Raney Cu) to amorphous through mechanical alloying and liquid nitrogen cooling. This structural change maintains high catalytic activity while improving selectivity to increase methanol yield beyond 10.9%.
Solution Approach 2:
The patent combines Cu-Zn-Al amorphous alloy with support materials to create a composite catalyst that maintains high activity while improving product distribution. The composite structure prevents over-hydrogenation and side reactions, increasing methanol yield.
3Productivity
If conventional catalysts are used, then production process is established, but carbon availability is low and energy requirements are high
Solution Approach 1:
The patent uses liquid nitrogen cooling during reduction to precisely control temperature and prevent energy-wasting side reactions. The amorphous structure achieves higher carbon availability while the controlled reduction process reduces energy requirements compared to conventional high-temperature methods.
Solution Approach 2:
The patent converts the typically harmful effect of liquid nitrogen (extreme cold) into a beneficial cooling mechanism during catalyst reduction. This cryogenic cooling prevents unwanted side reactions and improves carbon availability while reducing energy consumption by avoiding high-temperature prolonged heating.
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
The process achieves high CO conversion, improved selectivity of target products, and increased carbon availability, with the catalyst showing superior catalytic activity, stability, and reduced energy requirements, allowing for efficient production of methanol, dimethyl ether, and low carbon olefins.
Implementation Method 1
the catalyst contains an amorphous alloy consisting of a first component Al and a second component excluding Al element... converting the syngas into methanol, dimethyl ether, and low carbon olefins
Data Source
AI summary
The present invention provides a process for preparing methanol, dimethyl ether, and low carbon olefins from syngas, wherein the process comprises the step of contacting syngas with a catalyst under the conditions for converting the syngas into methanol, dimethyl ether, and low carbon olefins, characterized in that, the catalyst contains an amorphous alloy consisting of a first component Al and a second component, said second component being one or more elements or oxides thereof selected from Group IA, IIIA, IVA, VA, IB, IIB, IVB, VB, VIB, VIIB, VIII, and Lanthanide series of the Periodic Table of Elements, and said second component being different from the first component Al. According to the present process, the syngas can be converted into methanol, dimethyl ether, and low carbon olefins in a high CO conversion, a high selectivity of the target product, and high carbon availability.