Total Site Hydrogen Integration and Waste Hydrogen Purification for Minimising the Fresh Hydrogen Consumption
Limei Gai*, Petar Sabev Varbanov, Yee Van Fan, Jiří Jaromír Klemeš
Sustainable Process Integration Laboratory – SPIL, NETME Centre, Faculty of Mechanical Engineering, Brno University of Technology - VUT BRNO, Technická 2896/2, 616 69 Brno, Czech Republic, firstname.lastname@example.org
This paper proposes a novel method combining Pinch Methodology and waste hydrogen purification approaches, to minimise the fresh hydrogen consumption and also waste hydrogen discharge/wastage. Plant-level Pinch Analysis has been extended to Total Site Hydrogen Integration by considering fresh hydrogen supply with varying quality. The techno-economic performance of different hydrogen purification approaches, including membrane separation, is considered, where the total annual profit is optimised. Hydrogen networks of three oil refineries are used in a case study to demonstrate the applicability of the proposed method. The results indicate that the minimum fresh hydrogen consumption at the concentration of 95 % and minimum waste hydrogen discharge could be reduced by 21.26 % and 67.63 %.
For the waste hydrogen purification process with 30.43 kNm3/h feed flowrate, the hydrogen recovery ratio that can be achieved is 94.61 %, total annual profit is 10.7 M€/y (total annual capital cost is 0.8 M€/y, total product income is 51.8, total operating cost is 40.3 M€/y). This study suggests that significant economic and environmental benefits can be attained via Total Site Integration. The waste hydrogen is first utilised through process integration before the purification process, which incurred additional environmental footprint. That is in line with the circular economy concept in retaining the resources in the system as long as possible before recovery (end of life management).
This research has been supported by the EU project "Sustainable Process Integration Laboratory – SPIL", project No. CZ.02.1.01/0.0/0.0/15_003/0000456 funded by EU "CZ Operational Programme Research, Development and Education", Priority 1: Strengthening capacity for quality research.
|Affiliation of speaker||Sustainable Process Integration Laboratory – SPIL, NETME Centre, Faculty of Mechanical Engineering, Brno University of Technology|
|Publication||Without publication of the article|