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Pd/MCM-41 catalyst for acetylene hydrogenation to ethylene
Lihua Kang1, Bozhen Cheng2, Mingyuan Zhu1,2
1College of Chemistry and Chemical Engineering, Yantai University, Yantai, Shandong 264005, People's Republic of China.
Royal Society Open Science
|December 13, 2019
Summary
Researchers developed a new catalytic method to produce ethylene from acetylene using palladium catalysts. The Pd/MCM-41 catalyst achieved an 82.87% ethylene yield after optimizing reaction conditions, offering an efficient route for ethylene production.
Area of Science:
- Chemical Engineering
- Catalysis
- Materials Science
Background:
- Ethylene is a crucial chemical feedstock for producing polymers and other organic compounds.
- Traditional ethylene production methods face challenges related to energy intensity and feedstock availability.
- The calcium carbide route offers an alternative pathway for acetylene generation, a precursor to ethylene.
Purpose of the Study:
- To investigate the selective hydrogenation of high-concentration acetylene to ethylene using various supported palladium catalysts.
- To optimize reaction conditions for maximizing ethylene yield via the calcium carbide route.
- To identify the most effective catalyst support and palladium loading for efficient ethylene synthesis.
Main Methods:
- Preparation of palladium catalysts supported on Al2O3, SiO2, and MCM-41 using the ethylene glycol reduction method.
- Characterization of catalysts using techniques such as transmission electron microscopy, X-ray powder diffraction, and thermogravimetry.
- Evaluation of catalytic performance in high-concentration acetylene hydrogenation and optimization of reaction parameters (temperature, space velocity).
Main Results:
- The Pd/MCM-41 catalyst exhibited superior performance due to small particle size and uniform dispersion of palladium.
- An initial ethylene yield of 62.09% was achieved with the Pd/MCM-41 catalyst.
- Optimization of reaction conditions and a palladium loading of 0.1% resulted in a significantly enhanced ethylene yield of 82.87%.
Conclusions:
- The MCM-41 support is highly effective for palladium catalysts in the selective hydrogenation of acetylene to ethylene.
- Optimized reaction conditions and low palladium loading can achieve high ethylene yields, demonstrating the viability of this catalytic route.
- This study presents a promising approach for efficient ethylene production from acetylene derived from calcium carbide.
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