Carbon Neutral CH 4 production during CO 2 Storage in Permafrost and Marine Environment

• Main Authors: Pandey, Jyoti Shanker, Karantonidis, Charilaos, von Solms, Nicolas
• Format: Conference Object
• Language: English
• Published: 2020
• Subjects: /dk/atira/pure/sustainabledevelopmentgoals/life_below_water; SDG 14 - Life Below Water; Methane hydrate; permafrost
• Online Access: https://orbit.dtu.dk/en/publications/d0675eeb-9e30-4631-a657-d76cf1cdd550; https://backend.orbit.dtu.dk/ws/files/236626086/Abstract_618436.pdf

CO 2 -rich gas injection into natural gas hydrate reservoirs is proposed as a carbon-neutral, novel technique to store CO 2 while simultaneously producing CH 4 gas from methane hydrate deposits without disturbing geological settings. Geological sequestration of CO 2 -rich gas in natural gas hydrate reservoirs for CO 2 capture and storage technique has a lower technical and cost barrier compared to other industrial alternate. This novel technique has ability to contribute to global warming mitigation strategies, including carbon capture, utilization, and storage (CCUS) and methane release prevention into the atmosphere hydrate melting caused by global warming. CO 2 storage and simultaneous CH 4 production is known as hydrate swapping. In this study, we have studied hydrate swapping in sands in the presence of low dosage chemicals including alcohols, surfactant and amino acids. Through this study, we have demonstrated the novel application of anti-agglomerate and hydrate inhibitor additives when used in low concentration to enhance CH 4 -CO 2 hydrate exchange. This research opens the possibility of CO 2 storage in methane hydrate without disturbing the geological formation using the CH 4 -CO 2 hydrate exchange processes in the presence of anti-agglomeration additives. Presence of these chemicals in water would delay hydrate formation at the gas-liquid interface during CO 2 injection into methane hydrate and would create dispersed hydrate morphology. Delay in hydrate film formation and its dispersed nature would allow additional CO 2 gas molecule availability for CH 4 -CO 2 swapping, thus improving both CH 4 recovery and CO 2 storage.