chemistry

Jürgen Gmehling

Jürgen Gmehling is a chemistry topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Jürgen Gmehling rather than just read about it. In short: Jürgen Gmehling (born 13 January 1946 in Duisburg) is a retired German professor of technical and industrial chemistry at the Carl von Ossietzky University of Oldenburg. Biography His career started with an apprenticeship as a laboratory assistant at the Duisburg copper works before he studied chemical engineering at the engineering school in Essen and then chemistry in Dortmund and Clausthal.

Key takeaways

Jürgen Gmehling belongs to chemistry; place it in that map before memorising details.
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Reproduce the core statement of Jürgen Gmehling from memory before moving on to harder problems.

Reference excerpt

Jürgen Gmehling (born 13 January 1946 in Duisburg) is a retired German professor of technical and industrial chemistry at the Carl von Ossietzky University of Oldenburg.

Biography His career started with an apprenticeship as a laboratory assistant at the Duisburg copper works before he studied chemical engineering at the engineering school in Essen and then chemistry in Dortmund and Clausthal. He received his diploma from the University of Dortmund in 1970 and his PhD (Dr. rer. nat., inorganic chemistry) in 1973. After this he worked as a scientific coworker in Dortmund before he became a private lecturer and, after his habilitation, an assistant professor. Gmehling was appointed a full professor for technical chemistry at the University of Oldenburg in 1989 and retired in 2011.

Fields of research Gmehling's main focus is the process development. This includes the development of software for process synthesis and process simulation as well as measurement, collection, and estimation of thermophysical properties of pure components and component mixtures. The following list summarizes fields of his scientific work but is in no way complete.

Measurements Phase equilibrium data (vapor-liquid equilibria, liquid-liquid equilibria, solid–liquid equilibria, gas solubilities, heats of mixing, activity coefficients and more)

Data collection Gmehling began in the 1970s with the systematic evaluation of the scientific literature, aiming to build a data bank for vapor-liquid equilibria. These data were needed for the development of a new method for the prediction of activity coefficients named UNIFAC. This data bank is still named the Dortmund Data Bank.

Development of estimation and correlation models Gmehling developed with colleagues models for the estimation of several thermodynamic and thermophysical properties:

Activity coefficient models like UNIFAC (see also group contribution method) and extensions. For the further development of these widely used methods Gmehling founded an industry consortium where many international companies are participating. Equations of state (EOS) including mixing rules for applying EOS to mixtures (see PSRK).

Software development The following implementation of his methods are also developments:

an expert system for the entrainer selection for the azeotropic and extractive distillation

Awards

Gmehling has received some awards:

Arnold-Eucken Price in 1982 The Rosini Lectureship Award in 2008 The Gmelin-Beilstein-Denkmünze (Silver Medal) in 2010 The Emil Kirschbaum Medal in 2013

Publications Gmehling has published scientific articles and books.

Selection of scientific articles

External links Chair at the University of Oldenburg Prof. Jürgen Gmehling DDBST GmbH LTP GmbH UNIFAC consortium Chemistry International article about Rossini Lectureship Award (accessed 2008-08-31)

Worked examples

Example 1 — a first encounter with Jürgen Gmehling

Start with the simplest possible case. Write down what Jürgen Gmehling claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In chemistry, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Jürgen Gmehling before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Jürgen Gmehling ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Jürgen Gmehling

In research: Jürgen Gmehling appears in chemistry research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Jürgen Gmehling in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Jürgen Gmehling is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1946 births, 20th-century German chemists, 21st-century German chemists, so understanding it makes those chapters shorter.
In everyday life: Look for Jürgen Gmehling outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Jürgen Gmehling in 20 minutes

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Close the page and write down what Jürgen Gmehling means in your own words.
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Frequently asked questions

What is Jürgen Gmehling in simple terms?

Jürgen Gmehling (born 13 January 1946 in Duisburg) is a retired German professor of technical and industrial chemistry at the Carl von Ossietzky University of Oldenburg. Biography His career started with an apprenticeship as a laboratory assistant at the Duisburg copper works before he studied chem…

Why does Jürgen Gmehling matter?

Because it connects several chemistry ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Jürgen Gmehling?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Jürgen Gmehling.