January 2025
Process Optimization
A novel process and machinery unit for the highly efficient liquefaction of renewable natural gases
The authors’ company has developed a gas expansion-based liquefaction processa using a proprietary machine called a compander. This article describes the newly developed process, including ease of operation and permitting, as well as high quality thanks to in-house design, manufacturing, assembly and testing of key components.
The Authors
Andreas Bub joined Linde in 2008 as a Process Engineer for natural gas plants. In this role, he led several NGL, LNG, NRU and helium projects worldwide. Since 2023, Bub has led the Process Design Group for natural gas plants for the product line Sustainable Hydrocarbon Solutions. He earned an MS degree in chemical engineering from the Technical University of Karlsruhe.
Thilo Schiewe joined Linde in 1997 and has held various management positions in business development and sales, product management and cost estimation in the product line LNG and natural gas processing plants. Later, Dr. Schiewe headed the business unit for LNG plants at Linde Engineering’s subsidiary in Hangzhou, China. Since early 2023, he has held responsibility for the cost estimation group of the newly established product line Sustainable Hydrocarbon Solutions and drives new product developments, with a special focus on liquefaction of RNG. Dr. Schiewe earned a PhD in chemical engineering from the University Erlangen-Nuremberg in Germany.
Henry Howard is a Corporate Fellow and a member of the cryogenic process R&D group within Linde Engineering. In his 35 yr at Linde, he has focused on the development of new cycles and equipment configurations in support of atmospheric, CO2 and natural gas processing. His expertise also includes the advancement of distillation technology through field testing and process model reconciliation. He is the inventor of more than 75 granted U.S. patents and has authored several papers related to the integration and optimization of equipment within cryogenic processes. Howard earned BS and MS degrees in chemical engineering from Rensselaer Polytechnic Institute and the University of Michigan (Ann Arbor), respectively.
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