Economical and high throughput synthesis of copper nanopowder using continuous stirred tank and tubular flow reactors

•Continuous high throughput production of small (2–5nm) Cu nanoparticles has been demonstrated.•Re-dispersible nanopowder has been formed from the sol.•The yield of copper (from Cu in salt to Cu in nanopowder) is found to be 80.2% for CSTR and 43.3% for tubular reactor. In this work, we present a sy...

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Published inChemical engineering journal (Lausanne, Switzerland : 1996) Vol. 304; pp. 241 - 250
Main Authors Chatterjee, Swarnendu, Maji, Nitai Chandra, Shaik, Aabid Hussain, Chakraborty, Jayanta
Format Journal Article
LanguageEnglish
Published Elsevier B.V 15.11.2016
Subjects
Continuous synthesis
Copper nanoparticles
Nanoparticle yield
Nanopowder
Continuous synthesis
Nanopowder
Nanoparticle yield
Copper nanoparticles
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Summary:•Continuous high throughput production of small (2–5nm) Cu nanoparticles has been demonstrated.•Re-dispersible nanopowder has been formed from the sol.•The yield of copper (from Cu in salt to Cu in nanopowder) is found to be 80.2% for CSTR and 43.3% for tubular reactor. In this work, we present a synthetic protocol for production of sub 10nm copper nanopowder (CuNPs) using continuous stirred tank (CSTR) and tubular flow reactors (PFR). Substantially higher throughputs of CuNPs have been achieved in this new protocol by reducing a copper salt with hydrazine hydrate/sodium borohydride as reducing agent. Copper nanopowder can be prepared from the sol by high speed centrifugation of the colloid. The nanopowder preserves size and shape upon re-dispersion. It has been shown that the contacting patterns do not have significant effect on particle size and shape but the overall yield is heavily dependent on the contacting pattern and reactor design. Scaling has been identified as a key issue in determining the yield.
ISSN:1385-8947
1873-3212
DOI:10.1016/j.cej.2016.06.081