title: Integrated CO2capture-fixation chemistry via interfacial ionic liquid catalyst in laminar gas/liquid flow.
abstract: Simultaneous capture of carbon dioxide (CO2) and its utilization with subsequent work-up would significantly enhance the competitiveness of CO2-based sustainable chemistry over petroleum-based chemistry. Here we report an interfacial catalytic reaction platform for an integrated autonomous process of simultaneously capturing/fixing CO2in gas-liquid laminar flow with subsequently providing a work-up step. The continuous-flow microreactor has built-in silicon nanowires (SiNWs) with immobilized ionic liquid catalysts on tips of cone-shaped nanowire bundles. Because of the superamphiphobic SiNWs, a stable gas-liquid interface maintains between liquid flow of organoamines in upper part and gas flow of CO2in bottom part of channel. The intimate and direct contact of the binary reagents leads to enhanced mass transfer and facilitating reactions. The autonomous integrated platform produces and isolates 2-oxazolidinones and quinazolines-2,4(1H,3H)-diones with 81-97% yields under mild conditions. The platform would enable direct CO2utilization to produce high-valued specialty chemicals from flue gases without pre-separation and work-up steps.
authors.affiliation: National Center of Applied Microfluidic Chemistry, Department of Chemical Engineering, POSTECH (Pohang University of Science and Technology), Pohang 37673, Korea.
authors.forename: Niraj K
authors.initials: NK
authors.lastname: Vishwakarma
authors.affiliation: National Center of Applied Microfluidic Chemistry, Department of Chemical Engineering, POSTECH (Pohang University of Science and Technology), Pohang 37673, Korea.|Division of Natural Product Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007 India.
authors.forename: Ajay K
authors.initials: AK
authors.lastname: Singh
authors.affiliation: National Center of Applied Microfluidic Chemistry, Department of Chemical Engineering, POSTECH (Pohang University of Science and Technology), Pohang 37673, Korea.
authors.forename: Yoon-Ho
authors.initials: YH
authors.lastname: Hwang
authors.affiliation: National Center of Applied Microfluidic Chemistry, Department of Chemical Engineering, POSTECH (Pohang University of Science and Technology), Pohang 37673, Korea.
authors.forename: Dong-Hyeon
authors.initials: DH
authors.lastname: Ko
authors.affiliation: National Center of Applied Microfluidic Chemistry, Department of Chemical Engineering, POSTECH (Pohang University of Science and Technology), Pohang 37673, Korea.
authors.forename: Jin-Oh
authors.initials: JO
authors.lastname: Kim
authors.affiliation: National Center of Applied Microfluidic Chemistry, Department of Chemical Engineering, POSTECH (Pohang University of Science and Technology), Pohang 37673, Korea.
authors.forename: A Giridhar
authors.initials: AG
authors.lastname: Babu
authors.affiliation: National Center of Applied Microfluidic Chemistry, Department of Chemical Engineering, POSTECH (Pohang University of Science and Technology), Pohang 37673, Korea.
authors.forename: Dong-Pyo
authors.initials: DP
authors.lastname: Kim