John van der Schaaf
The switch to renewable resources requires a new generation of chemical production plants. I develop small, multipurpose and durable production units enabling a self-sustainable chemical community that provides for local welfare and wellbeing.
The research of John van der Schaaf focuses on the development of catalytic and non-catalytic multiphase reactors that use rotation to create high gravity and high shear conditions. These conditions lead to excellent interphase mass transfer, intraphase mixing, and fluid-to-wall heat transfer. Applications are especially in (exothermic) fast reactions that are interphase mass transfer limited, are mixing limited, or are heat transfer limited. Additionally, in a high gravity field two phases with different density can be contacted countercurrently. Thus, distillation (gas-liquid), extraction (liquid-liquid), and crystallization (liquid-solid) become feasible. The high-gravity high-shear conditions enable the use of extremely compact equipment for the chemical industry. The equipment is easily a factor hundred smaller than conventional equipment. The much smaller equipment size allows for the safe use of high temperatures and high pressures, enlarging the economic process window. An additional benefit of the small equipment size is that expensive construction materials and coatings can be used, with only a minor increase in equipment costs. In future research Van der Schaaf will focus on the performance of high-gravity high-shear equipment as a function of design, operating conditions, and fluid properties. For proper design and optimization, preferably determined with industrially relevant systems, research is required into e.g. flow patterns, mixing intensity, and interphase mass transfer.
John van der Schaaf studied chemical engineering at TU Delft where he obtained his master's degree in 1993. In 1998 he obtained his PhD from the same university with his thesis 'Dynamics of Gas-Solids Fluidized Beds - analysis of pressure fluctuations'. Until 2000 he performed postdoctoral research at TU Delft on the validation of computational fluid dynamics codes for gas-solid fluidized beds. In 2000 he moved to Eindhoven University of Technology (TU/e) where he joined the Glass Technology research group of Prof. Ruud Beerkens to perform postdoctoral research on the formation of foam in glass melting furnaces, in cooperation with TNO. In 2003 he started working as assistant professor (tenure track) in the Chemical Reactor Engineering group of Prof. Jaap Schouten. In 2014 he was appointed associate professor and since 2017 he is the chair of the group.
Viscoelastic effects on residual oil distribution in flows through pillared microchannelsJournal of Colloid and Interface Science (2018)
Intensification of the chlor-alkali process by using a spinning disc membrane electrolyzerChemical Engineering Research and Design (2017)
Micromixing in a rotor-stator spinning disc reactorIndustrial and Engineering Chemistry Research (2017)
Lane change in flows through pillared microchannelsPhysics of Fluids (2017)
Maxwell-Stefan model of ion transport at high current density inside a monolayer Nafion membrane for intensified electrolysis10th World Congress of Chemical Engineering (WCCE10), 1-5 October, 2017, Barcelona, Spain (2017)
- High gravity and high shear reactors.
- Capita selecta
- Advanced chemical reactor engineering
- Graduation Project CPT
- Chemical reactors
- Redeactioneel, vakinhoudelijke publicaties/overviews schrijven, verslagen conferentiesd, aangeven van mogelijke topics, NPT Procestechnologie
- Consultancy, inbrengen ideeen, valorizering kennis., Flychem B.V.
- Editor, Chemical Engineering Research and Design