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Highly effective carbon-supported gold-ionic liquid catalyst for acetylene hydrochlorination
Xueyan Qi1,2, Weifeng Chen3, Jinli Zhang2
1College of Materials Science and Engineering, Hebei University of Engineering Handan 056038 Hebei PR China qixueyan001@163.com.
A novel non-mercuric catalyst using trimethylsulfonium iodide (C3H9SI) and gold on active carbon (Au-IL/SAC) shows high efficiency and stability for acetylene hydrochlorination, offering a greener alternative.
Area of Science:
- Catalysis
- Materials Science
- Green Chemistry
Background:
- Acetylene hydrochlorination traditionally uses mercury-based catalysts, posing environmental risks.
- Developing efficient, non-mercuric catalysts is crucial for sustainable industrial processes.
Purpose of the Study:
- To synthesize and evaluate a novel non-mercuric catalyst for acetylene hydrochlorination.
- To investigate the role of a sulfur-containing ionic liquid (trimethylsulfonium iodide, C3H9SI) in catalyst performance.
Main Methods:
- Synthesis of gold-ionic liquid/spherical active carbon (Au-IL/SAC) catalysts via incipient wetness impregnation.
- Testing catalytic performance in acetylene hydrochlorination under various conditions.
- Characterization using BET, TGA, TPD, XRD, TEM, and XPS.
Main Results:
- The 0.3% Au-IL/SAC catalyst achieved 90% acetylene conversion at 170 °C and 360 h⁻¹ GHSV.
- The catalyst demonstrated excellent stability, maintaining 97% conversion for 200 hours.
- C3H9SI improved gold dispersion and inhibited coke deposition.
Conclusions:
- The Au-IL/SAC catalyst is a highly active and stable non-mercuric alternative for acetylene hydrochlorination.
- The ionic liquid additive plays a key role in enhancing catalyst performance and longevity.
- This catalyst presents a promising green option for industrial applications.
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