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Ah-Hyung Alissa Park is a chemical engineer whose research concerns carbon capture and storage, together with carbon dioxide utilization and the development of materials and processes for more sustainable energy systems. Her UCLA profile describes nanohybrid materials for carbon dioxide capture and conversion, together with work on chemistry of carbonates, recovery of critical minerals and rare-earth elements.^[ref]

The scientific connection is between material structure and a chemical process: the way a material binds or reacts with carbon dioxide determines how it can be separated, transformed or stored. Evaluating such a process also requires tracking material flows and energy use through the larger system. This links surface chemistry, chemical reaction engineering and the assessment of alternative process designs rather than treating capture alone as the complete objective.^[ref]

Anthony E. Butterfield, also known as Tony Butterfield, is a chemical engineer whose work combines mathematical modeling, experimental measurement and education. His historical University of Utah biography describes a master's project on finite element simulation of cell cycle kinetics and doctoral work on model-based filtering and control of individual molecular motors.^[ref]

These topics illustrate how chemical engineering can connect a small physical system with an inferred mathematical description: measurements are interpreted through a mathematical model, and a controller uses that description to influence the system. His outreach material also connects chemistry with measurements students can reason about; Carbon Captured Chalk by Tony Butterfield is one such educational contribution. The research and teaching examples concern the same general skill of relating a model to observable behaviour.

A chemical engineer applies chemical engineering to processes involving reactions, separations or material transport. The work can include constructing mass and energy balances, estimating equipment sizes and interpreting measurements from a process. For a distillation system, vapor-liquid equilibrium predicts separation possibilities while heat and material flows determine how the equipment can achieve them. The role connects molecular properties to the behaviour of larger interacting units.

A chemical engineer who has worked on separation processes. He is credited as publisher of the Hyper-TVT teaching site; that role does not establish authorship of its individual chapters.

Institutional profile: mavt.ethz.ch/news-and-events/d-mavt-news/2024/11/an-applied-mathematician.html

Site imprint: www.hyper-tvt.ethz.ch/tvt_imprint.html

Robert S. Langer is a chemical engineer whose work connects biomaterials, drug delivery and tissue engineering. His MIT departmental profile identifies these as research areas, linking the chemical properties of a material to the biological task it is intended to perform.^[ref]

Langer coauthored the primary artery-engineering report and work on surface treatment of polymer meshes for vascular cell culture.^[ref][ref] The mesh study illustrates an interface problem: changing a polymer surface can change initial cell attachment without requiring the whole material to have a different macroscopic shape.

The broader engineering idea is to treat a biological function as a design problem with several interacting constraints. A material intended to support a developing tissue must permit transport and cell adhesion as well as supply mechanical support. A drug delivery material additionally has a release history: the initial amount loaded does not specify how much becomes available at each time. These distinctions explain why material chemistry, geometry and the biological environment are studied together.

Yannis G. Kevrekidis is a chemical engineer whose research connects dynamical systems, multiscale modeling and machine learning. His institutional research description emphasizes how interactions at small scales produce larger-scale patterns, instabilities and dynamics in physical, chemical and biological systems.^[ref]

With collaborators he developed equation-free modeling, in which detailed simulations are used to investigate coarse-scale behaviour even when a closed equation for the coarse variables is unavailable. The motivating distinction is between possessing a simulator of microscopic dynamics and possessing a compact equation for a few large-scale observables. This places numerical analysis, the choice of state variables and the extraction of useful descriptions at the centre of multiscale modeling.^[ref]