Introduction

The transition to a low‑carbon energy system requires not only reducing CO₂ emissions, but also finding smart ways to utilize CO₂ as a feedstock. One promising route is the direct synthesis of dimethyl ether (DME) from CO₂ and H₂, using green hydrogen produced from renewable electricity.

DME is an oxygenated fuel that offers several advantages, such as clean combustion, versatile use, serving as an intermediate for other chemicals, and being easier to store and transport than many alternative energy carriers. By modelling and evaluating the one‑step CO₂ and H₂ to DME route, this thesis will explore how CO₂ can be transformed from a waste stream into a useful energy carrier.

By focusing on one‑step DME synthesis directly from CO₂ and H₂, this thesis aligns with current research and industrial interest in carbon capture and utilization (CCU) and Power‑to‑X technologies.

Why this thesis is interesting:

1. 1. Work at the intersection of reaction engineering, process design, and energy integration, contributing to a highly topical field in sustainable chemical engineering.
2. 2. Use state‑of‑the‑art process simulation tools (Aspen) to design and analyse a realistic process.
3. 3. Develop hands‑on modelling skills that are highly valued in both academia and industry, especially in the context of green fuels and chemicals.

If you are curious about how we can convert CO₂ into clean fuels, enjoy process modelling, and want to engage in the energy transition, this thesis offers a challenging and rewarding environment.

Objectives

The overall aim of the thesis is to develop and evaluate an integrated process for one‑step DME synthesis from CO₂ and H₂, including both technical and value chain aspects. Specific objectives include:

1. 1. Process and value chain development for capturing CO₂ and direct DME synthesis from CO₂ and H₂ using Aspen (Plus/HYSYS, depending on setup).
2. 2. Perform parametric and sensitivity analyses on key process and value chain parameters (e.g., pressure, temperature, recycle ratios, catalyst activity, CO₂/H₂ ratio, etc.).
3. 3. Implement or refine reaction kinetic models for one‑step DME synthesis.
4. 4. Carry out parameter regression for kinetic and thermodynamic (binary interaction) parameters based on literature data and/or experimental data provided.
5. 5. Explore trade‑offs between conversion, selectivity, energy consumption, and plant costs, and identify promising operating windows.

Required Expertise and Profile

We are looking for a Master’s student with the following background and interests:

• - Ongoing Master’s studies in Chemical Engineering, Process Engineering, Energy Engineering, or a closely related field.
• - Basic knowledge of chemical engineering fundamentals: material and energy balances, thermodynamics, reaction engineering, and unit operations.
• - Experience with Aspen (Aspen Plus) or similar process simulation software is highly advantageous.
• - Strong curiosity to learn and willingness to dive into new topics, such as CO₂ utilization and Power‑to‑X technologies.

Thesis is possible only in English.