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Updated: Oct 11, 2025
Synthesis of Bimetallic Pt/Sn-based Nanoparticles in Ionic Liquids
Published on: August 23, 2018
Sn(II)/PN@AC catalysts: synthesis, physical-chemical characterization, and applications
Yibo Wu1,2, Fuxiang Li2, Qinbin Li1
1College of Chemistry and Environmental Engineering, Pingding Shan University, Pingding Shan China.
Novel tin-based catalysts (Sn(II)/PN@AC) using dual-modified activated carbon support show high acetylene conversion and vinyl chloride selectivity. The new support material effectively reduces catalyst deactivation in acetylene hydrochlorination.
Area of Science:
- Catalysis
- Materials Science
- Chemical Engineering
Background:
- Acetylene hydrochlorination is a key industrial process for vinyl chloride monomer (VCM) production.
- Traditional catalysts often suffer from deactivation due to coking and tin leaching.
- Development of stable and efficient catalysts is crucial for sustainable VCM synthesis.
Purpose of the Study:
- To develop novel tin-based catalysts (Sn(II)/PN@AC) for enhanced performance in acetylene hydrochlorination.
- To investigate the role of phosphorus and nitrogen dual-modified activated carbon (PN@AC) as a support material.
- To understand the deactivation mechanisms and improve catalyst stability.
Main Methods:
- Preparation of tin-based catalysts (Sn(II)/PN@AC) using SnCl2 and PN@AC support.
- Evaluation of catalytic activity and selectivity in acetylene hydrochlorination under specific reaction conditions (180 °C, 30 h⁻¹ GHSV-C2H2).
- Comprehensive characterization using techniques like XRD, Raman, BET, TEM, XPS, FT-IR, TGA, and ICP.
Main Results:
- The 15%Sn(II)/PN@AC-550 catalyst achieved 100% initial acetylene conversion and >98.5% vinyl chloride selectivity.
- The deactivation rate of 15%Sn(II)/PN@AC-550 (0.47% h⁻¹) was significantly lower than that of 15%Sn(II)/AC-550 (1.02% h⁻¹).
- PN@AC-550 support improved tin dispersion, reduced coking, lessened SnCl2 oxidation, and inhibited tin leaching.
Conclusions:
- The PN@AC-550 support effectively enhances the stability and performance of tin-based catalysts for acetylene hydrochlorination.
- The catalyst design strategy offers a promising route for developing more robust catalysts for VCM production.
- A Rideal-Eley mechanism involving HSnCl3 as a transition state was proposed for the catalytic process.
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