Journal Pre-proof Continuous ﬂow semi-hydrogenation of alkynes using 3D printed catalytic static mixers Milan Kundra (Investigation) (Writing - review and editing), Borhan Bin Mohamad Sultan (Investigation), Derrick Ng (Methodology) (Investigation), Yaxi Wang (Investigation), David Alexander (Software) (Methodology), Xuan Nguyen (Supervision), Zongli Xie (Conceptualization), Christian H. Hornung (Conceptualization) (Supervision) (Writing - review and editing) PII: S0255-2701(20)30475-X DOI: https://doi.org/10.1016/j.cep.2020.108018 Reference: CEP 108018 To appear in: Chemical Engineering and Processing - Process Intensiﬁcation Received Date: 13 March 2020 Revised Date: 18 May 2020 Accepted Date: 1 July 2020 Please cite this article as: { doi: https://doi.org/ This is a PDF ﬁle of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the deﬁnitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its ﬁnal form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. © 2020 Published by Elsevier.