Development of blue ammonia production system from associated gas on offshore platforms Nippon Foundation – Deepstar Joint Ocean Innovation R&D Program November 9, 2022 Mitsubishi Heavy Industries, Inc.
Background
Associated gas at offshore oil production sites has created a bottleneck in plans to increase oil production because of the challenges in terms of environmental impact when flared and the limited capacity of transportation pipelines. Solution Blue Ammonia production at offshore to monetize the associated natural gas
Benefit
▷  Blue Ammonia is a valuable low carbon avenue with an existing shipping infrastructure. ▷ Reduce GHG emissions without flaring associated gas and mitigate pipeline capacity tightness Goal of Study ▷   Develop an offshore blue ammonia production system by combining the components of a floating structure, small size ammonia production, and CO2 capture and separation for utilization of associated gas Evaluate its technical and economical feasibility (3113 SEI HEAVY IN PUSTOLES, LTD). All Rights Res 2
Nippon Foundation And more.. . . DeepStar Sub Committee Director Shak Shamshy Project manager Joseph Gomes DeppStar Champions . ExxonMobil Wei Xu Carmela Chaney Marcel Staedter . Chevron Sean Beecroft Al Toweill . Shell Sean Eckerty 4022 MITSUE SHI HEAVY IN DUSTRIES, LTD.  All Rights Reserve 3
. Research on small-scale ammonia production, hydrogen production and other technologies. Scaling of facility based on the amount of offshore
Study on the impact of wave-induced shaking including acceleration, angle and oscillation period to clarify design
Identify areas where developments are required for offshore Investigate the feasibility of scaling up by multi-trains of facilities and summarize technical issues. Technical review of structure and layout in offshore deployment. . Overall summary of technical and economic feasibility based on outlined OPEX and CAPEX, summarize the challenges for realizing offshore ammonia production.
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Technology review Overview
▪ Large-scale SMR, Carbon Capture and NH3 Production facilities on the land have already been commercialized, but some small-scale facilities are still in the development stage and need to be reviewed for applicability to this project. . Identify the range of capacities of each technology which and determine the capacity of the base case facility based on the requirement from the throughput of offshore associated gas. ※  AGR : Acid Gas Removal -24022 MT SUB SHI HEAVY IN BUSTRIES, LTD.  All Rights Reserved 6
Industrial ammonia production technology 2,000 TPD - 6,000TPD of Ammonia Production → requires 50 mmscfd – 160 mmscfd of CH4 Small size ammonia production technology 50 TPD - of Ammonia Production  → requires 1.4 mmscfd – of CH4 Offshore associated gas Volume Having large variability by oil field location → 10 mmscfd - 500 mmscfd Image of base Image of multi- Throughput target of this study case of 1train train plant Set 10 mmscfd Natural gas which is a typical amount of Gulf of Mexico as a base case and consider the multi-train of the base case for scale-up. → Base case would be approx. 350TPD ammonia production in the meantime, 520ton/d CO2 would be produced. 22 MTSUE SHI HEAVY IN DUSTRIES, LTD.  All Rights Reserv 6
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