CO2Valorize - Supplementary Cementitious Materials (SCMs) from Waste Concrete: Carbonation Kinetics... (# of pos: 4)

Industrial Doctorate at the Karlsruhe Institute of Technology

Karlsruhe Institute of Technology (KIT) is seeking a highly motivated graduate student to enrol

in an Industrial Doctorate hosted at the Institute for Technical Chemistry at KIT, Germany, and

the Department of Cement Process and Systems R&D at FLSmidth A/S, Denmark. The project

is part of the international doctoral training network entitled "Valorization of CO2 for low carbon

cement (CO2Valorize)”, funded by the Marie Skolodowska-Curie Action of the European

Commission. The complete programme consists of eight international PhD projects that

perform individual research projects to identify technological solutions that help significantly

reduce carbon dioxide emissions in the cement industry.

Scientific Project of Doctoral Candidate No. 2

Supplementary Cementitious Materials (SCMs) from Waste Concrete: Carbonation

Kinetics in a Semi-Dry Stirred Reactor.

Scope of the project is an optimised induced carbonation process for waste concrete fines.

Main work packages of the project are

1) Hydrothermal carbonation of standardised waste concrete fines in a semi-dry stirred

    autoclave. This includes experimental work to optimise the reaction parameters and ex-situ

    analyses of solid samples to determine heat and mass transfer and reaction kinetics.

2) Development of a reactor model describing the carbonation process of waste concrete fines

    based on experimental and literature data as well as data from the CO2Valorize project partners.

3) Model validation and scale-up calculations based on the reactor model, estimated

    scale-up factors, and costs.

Employment periods: 15 months at FLSMIDTH AS, Denmark, 21 months at KIT, Germany.

The doctoral candidate will be integrated into and co-work with both

KIT’s cementitious materials processing research group and FLSimdth’s R&D group.