A recent study has brought forward the potential of hydrogen derived from coke oven gas as a game-changer in carbon capture through the calcium looping process. This innovative approach addresses the challenge of decarbonizing industries like cement, steel, and glass manufacturing, which are critical but inherently emission-intensive. By utilizing quicklime to capture CO2 from flue gases, calcium looping, combined with hydrogen, not only optimizes emission reduction but also enables the production of synthetic methane, fostering a closed carbon cycle. The research indicates that coke oven gas-sourced hydrogen surpasses renewable hydrogen in efficiency and profitability, making it a lucrative option for industrial applications. While the long-term goal is to transition to cleaner hydrogen sources for net-zero emissions, the current economic viability of coke oven gas makes it a more practical choice in the short to medium term. Recommendations include siting calcium-looping facilities in regions abundant in limestone and coke oven gas, such as Northern China, to maximize the benefits of this technology and support global emission reduction efforts.