2025 AIChE Annual Meeting

(382ai) Solvent-Structured Reaction Engineering for Waste Conversion and Aqueous Catalysis

Author

Wenjia Wang - Presenter, University of Utah
Research Interests

I develop mechanistic models and process designs for catalytic and thermochemical reactions in solvent systems where conventional assumptions fail. These include supercritical water, concentrated aqueous electrolytes, and plastic liquefaction media. I quantify how solvent properties such as density, polarity, and ionic strength impact kinetics, transport, and separations. My work enables scalable conversion of waste streams—PFAS, dairy permeate, plastics, municipal sludge—into value-added products with validated mass balances, energy profiles, and process economics.

Industrial Relevance:

  • Pilot-scale experience with high-T aqueous reactors and separation systems

  • Process configurations tailored to variable feedstocks and regulatory targets

  • Predictive kinetic models support real-time control and process robustness

  • Techno-economic analysis and LCA completed for commercialization planning

Model Systems and Results:

  1. PFAS destruction in SCW: Radical chain kinetic modeling linked to solvent compressibility and dielectric properties. Defined operating windows for >95% defluorination.

  2. Plastic solvolysis: High-pressure liquefaction of mixed polyolefins. Reaction engineering linked to downstream carbon material production.

  3. Dairy waste valorization: Isomerization of galactose and lactose to high-value sugars. Reaction-separation integration with SMB systems. 40% tagatose yield at 80% galactose conversion.

Technical Capabilities:

  • Reactor design and operation under subcritical/supercritical conditions

  • Kinetic and mechanistic model development (non-ideal systems)

  • Multiphase mass transfer and sorption modeling

  • Process simulation (Aspen Plus), CFD, and Python-based tools

  • Analytical: GC-MS, NMR, MALDI-TOF-MS for species tracking and balances

Professional Background:

  • 18 peer-reviewed publications; >$14M in funded research proposals

  • PhD: University of Utah (Eric Eddings), Postdoc: UW–Madison (George Huber)

  • Proposal writing, student mentoring, and cross-functional team leadership

  • Experience bridging laboratory kinetics to pilot-scale implementation

Job Target:

Seeking industry R&D or process development roles focused on waste conversion, aqueous-phase catalysis, solvent systems, or pilot-scale chemical process scale-up. Strong interest in working with teams advancing sustainable materials, PFAS treatment, or carbohydrate processing platforms.