Tailoring Cu Nanoparticle Catalyst for Methanol Synthesis Using the Spinning Disk Reactor

Area of Science:

• Materials Science
• Chemical Engineering
• Catalysis

Background:

• Copper nanoparticles (NPs) exhibit high activity for methanol synthesis at low temperatures.
• Smaller copper NP sizes correlate with enhanced methanol productivity.
• Controlling NP size and distribution is crucial for optimizing catalytic performance.

Purpose of the Study:

• To control copper nanoparticle size and size distribution for methanol synthesis catalysis.
• To investigate the efficacy of the spinning disk reactor (SDR) for copper NP synthesis.
• To evaluate the catalytic activity of synthesized copper NPs for methanol production.

Main Methods:

• Utilized a spinning disk reactor (SDR) for rapid micro-mixing and controlled nucleation/growth of copper NPs.
• Employed a copper borohydride reduction method within the SDR to synthesize NPs.
• Varied physical and chemical conditions to tune NP size from 3 nm to 55 nm.
• Characterized synthesized NPs using X-ray diffraction (XRD) and transmission electron microscopy (TEM).

Main Results:

• Successfully synthesized copper NPs with controlled sizes ranging from 3 nm to 55 nm.
• XRD and TEM confirmed the presence of Cu₂O and Cu crystallites in dried samples.
• Synthesized copper NPs demonstrated activity as catalysts for low-temperature methanol synthesis.
• Methanol productivity was observed to increase with decreasing copper NP size.

Conclusions:

• The spinning disk reactor (SDR) is a scalable technique for producing size-controlled copper nanoparticles.
• Smaller copper NPs exhibit superior catalytic activity for methanol synthesis.
• Further optimization is needed to address nanoparticle separation challenges from the solution.