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Mitigating Carbon Dioxide Impact of Industrial Steam Methane Reformers by Acid Gas to Syngas Technology: Technical and Environmental Feasibility

Original scientific paper

Journal of Sustainable Development of Energy, Water and Environment Systems
Volume 8, Issue 1, March 2020, pp 71-87
DOI: https://doi.org/10.13044/j.sdewes.d7.0258
Andrea Bassani1, Daniele Previtali1, Carlo Pirola2, Giula Bozzano1, Simone Colombo1, Flavio Manenti1
1 Department of Chemistry, Materials and Chemical Engineering “Giulio Natta”, Polytechnic University of Milan, Piazza Leonardo da Vinci 32, 20133 Milan, Italy
2 Department of Chemistry, The University of Milan, Via Golgi 19, 20133 Milan, Italy


The aim of this work is to evaluate the potential application of a new sustainable technology, called Acid Gas to Syngas, on steam reforming process in order to reduce the carbon dioxide emissions. Indeed, steam reforming has high emissions of carbon dioxide, at almost 7 kg of carbon dioxide per 1 kg of hydrogen produced. The key idea of the new technology is to convert carbon dioxide and hydrogen sulfide coming from natural gas desulfurization into additional hydrogen. Coupling different software, i.e. Aspen HYSYS and MATLAB, a complete plant model, able to manage the recycle of unconverted acid gases, has been developed. The importance of introduced innovations is highlighted and a comparison between the old process and the new one with Acid Gas to Syngas technology is built up. With Acid Gas to Syngas technology the natural gas consumption and carbon dioxide emissions can be reduced up to 3%.

Keywords: Natural gas, Acid Gas to Syngas, Low emissions, Syngas, Steam reforming.

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