[3] The methodology was also developed into commercial software by companies such as Linnhoff March and AspenTech.
The Aspen product incorporated the work of Nick Hallale (formerly a lecturer at University of Manchester) and was the first method to consider multiple components, rather than a pseudo-binary mixture of hydrogen and methane.
[4] Nick Hallale and Fang Liu extended this original work, adding pressure constraints and mathematical programming for optimisation.
This was followed by developments at AspenTech, producing commercial software for industrial application.
Nick Hallale, Ian Moore, Dennis Vauk, "Hydrogen optimization at minimal investment", Petroleum Technology Quarterly (PTQ), Spring (2003)