My research has been focused on modeling in hetereogenous catalysis, regarding: reaction kinetics, catalyst deactivation, detailed reactor modeling, process dynamics, with a strong focus on optimization. The relevant reactions I've been working on are methanol synthesis, ammonia synthesis, and ammonia cracking.
Expertise
Chemical Engineering
- Ammonia Synthesis
- Chemical Kinetics Characteristics
- Methanol
- Methanol Synthesis
- Cu-ZnO-Al2O3 Catalysts
Earth and Planetary Sciences
- Acrylic Acid
- Distillation
- Propionic Acid
Organisations
Publications
2026
Multi-scale modeling of sustainable methanol and ammonia synthesis (2026)[Thesis › PhD Thesis - Research UT, graduation UT]. University of Twente. Keestra, H.https://doi.org/10.3990/1.9789036570473
2025
Universal kinetic model for ammonia synthesis on various ruthenium-based catalysts (2025)Chemical Engineering Journal, 523. Article 168541. Keestra, H., Rouwenhorst, K. H. R. & Brilman, D. W. F.https://doi.org/10.1016/j.cej.2025.168541A century of data: Thermodynamics and kinetics for ammonia synthesis on various commercial iron-based catalysts (2025)Chemical Engineering Journal, 518. Article 164593. Keestra, H., Slotboom, Y., Rouwenhorst, K. H. R. & Brilman, D. W. F.https://doi.org/10.1016/j.cej.2025.164593Corrigendum to “Improved kinetic model for methanol synthesis with Cu/ZnO/Al2O3 catalysts based on an extensive state-of-the-art dataset” [Chem. Eng. J. 507 (2025) 159953] (Chemical Engineering Journal (2025) 507, (S1385894725007521), (10.1016/j.cej.2025.159953)) (2025)Chemical Engineering Journal, 514. Article 163105. van Schagen, T. N., Keestra, H. & Brilman, D. W. F.https://doi.org/10.1016/j.cej.2025.163105Improved kinetic model for methanol synthesis with Cu/ZnO/Al2O3 catalysts based on an extensive state-of-the-art dataset (2025)Chemical Engineering Journal, 507. Article 159953. van Schagen, T. N., Keestra, H. & Brilman, D. W. F.https://doi.org/10.1016/j.cej.2025.159953
2023
The Infinity Reactor: A new conceptual design for a more cost-efficient CO2 to methanol route (2023)In 33rd European Symposium on Computer Aided Process Engineering, ESCAPE 2023: Athens, Greece from 18-21 June 2023 (pp. 2309-2316) (Computer Aided Chemical Engineering; Vol. 52). Elsevier. Keestra, H., Zondervan, E. & Brilman, W.https://doi.org/10.1016/B978-0-443-15274-0.50368-1Entrainer selection for the extractive distillation of acrylic acid and propionic acid (2023)Chemical engineering research and design (Transactions of the Institution of Chemical Engineers, part A), 192, 653-663. Keestra, H., Brouwer, T., Schuur, B. & Lange, J.-P.https://doi.org/10.1016/j.cherd.2023.02.049
Research profiles
Courses academic year 2024/2025
Courses in the current academic year are added at the moment they are finalised in the Osiris system. Therefore it is possible that the list is not yet complete for the whole academic year.
Address
University of Twente
Horst Complex (building no. 20), room ME360
De Horst 2
7522 LW Enschede
Netherlands
University of Twente
Horst Complex ME360
P.O. Box 217
7500 AE Enschede
Netherlands
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