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Open AccessArticle

The Role of Hydrogen in the Ecological Benefits of Ultra Low Sulphur Diesel Production and Use: An LCA Benchmark

1
Air Liquide Forschung und Entwicklung GmbH, Gwinnerstrasse 27–33, 60388 Frankfurt am Main, Germany
2
Industrial Design Engineering, Design for Sustainability, Delft University of Technology, Landbergstraat 15, NL 2628CE Delft, The Netherlands
*
Author to whom correspondence should be addressed.
Sustainability 2019, 11(7), 2184; https://doi.org/10.3390/su11072184
Received: 21 February 2019 / Revised: 25 March 2019 / Accepted: 2 April 2019 / Published: 11 April 2019
(This article belongs to the Special Issue Environmental Life Cycle Assessment)
Desulphurization of oil-based fuels is common practice to mitigate the ecological burden to ecosystems and human health of SOx emissions. In many countries, fuels for vehicles are restricted to 10 ppm sulphur. For marine fuels, low sulphur contents are under discussion. The environmental impact of desulphurization processes is, however, quite high: (1) The main current source for industrial hydrogen is Steam Methane Reforming (SMR), with a rather high level of CO2 emissions, (2) the hydrotreating process, especially below 150 ppm, needs a lot of energy. These two issues lead to three research questions: (a) What is the overall net ecological benefit of the current desulphurization practice? (b) At which sulfphur ppm level in the fuel is the additional ecological burden of desulphurization higher than the additional ecological benefit of less SOx pollution from combustion? (c) To what extent can cleaner hydrogen processes improve the ecological benefit of diesel desulphurization? In this paper we use LCA to analyze the processes of hydrotreatment, the recovery of sulphur via amine treating of H2S, and three processes of hydrogen production: SMR without Carbon Capture and Sequestration (CCS), SMR with 53% and 90% CCS, and water electrolysis with two types of renewable energy. The prevention-based eco-costs system is used for the overall comparison of the ecological burden and the ecological benefit. The ReCiPe system was applied as well but appeared not suitable for such a comparison (other damage-based indicators cannot be applied either). The overall conclusion is that (1) the overall net ecological benefit of hydrogen-based Ultra Low Sulphur Diesel is dependent of local conditions, but is remarkably high, (2) desulphurization below 10 ppm is beneficial for big cities, and (3) cleaner production of hydrogen reduces eco-cost by a factor 1.8–3.4. View Full-Text
Keywords: Ultra Low Sulfur Diesel; ULSD; desulphurization; hydrogen; hydrotreating; SMR; CCS; electrolysis; LCA; eco-costs Ultra Low Sulfur Diesel; ULSD; desulphurization; hydrogen; hydrotreating; SMR; CCS; electrolysis; LCA; eco-costs
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Olindo, R.; Vogtländer, J.G. The Role of Hydrogen in the Ecological Benefits of Ultra Low Sulphur Diesel Production and Use: An LCA Benchmark. Sustainability 2019, 11, 2184.

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