ChemEngZone

14/11/2025

Understanding thermodynamics is essential in chemical engineering, but fitting everything into two A3 pages is impossible.
So I focused on the fundamentals and turned them into 17 clear points: the First Law, PMM1 and PMM2, the Kelvin–Planck statement, the Carnot cycle, and entropy.

This summary is part of my Fix the Concept series — a collection of engineering materials designed to make complex topics easier to follow.

If you want to download the full 2-page A3 PDF, you can find it here (free):
👉 https://chemengzone.com/chemical-engineering-resources-free/

Feel free to share it with students or colleagues who might find it useful.

07/11/2025

Tray vs. Packed Columns — which one would you choose?

A quick visual summary for process engineers 👇

✅ Efficiency & pressure drop
✅ Flexibility & maintenance
✅ When to use trays or packing

📘 Download the FREE one-page PDF:
👉 https://chemengzone.com/pdf-trays-column-vs-packed-column/

07/11/2025

Do you still remember what the Reynolds number really tells us?
It’s not just a formula — it’s the key to understanding when a flow becomes turbulent.

This short visual guide explains:
- The difference between laminar and turbulent flow
-How inertia and viscosity interact
- The main Reynolds number ranges engineers use every day

Download the free one-page A3 PDF and keep it in your study notes or plant folder, it’s perfect for quick reviews!

https://chemengzone.com/fix-the-conpect-reynolds-number-equation/

01/11/2025

Did you know CO₂ sublimates at –78 °C?
In cryogenic gas abatement systems, this detail can make all the difference.

When CO₂ solidifies before the main solvents condense, part of the emissions can still escape through the vent line.
That’s why real industrial setups often combine several technologies — cryogenic units, molecular sieves, or activated carbon — depending on the impurities to remove.

In my new article, I explain how these systems work and how to select the right solution for VOC and CO₂ removal 👇

https://chemengzone.com/cryogenic-abatement-molecular-sieves/

Want to download ChemEngZone’s free technical PDFs?

Sign up here: https://chemengzone.com/chemical-engineering-resources-free/

Discover how VOC abatement systems work from cryogenic condensation and molecular sieves to activated carbon adsorption and scrubbers.