A recent study published in the journal Carbon Future introduces an innovative solution, hydrogen-driven calcium looping, as a method for efficient carbon capture in hard-to-decarbonize sectors such as cement and steel production. By utilizing hydrogen sourced from coke oven gas, a byproduct of steel production, researchers aim to optimize the carbon capture process while meeting industrial demands. The process involves reversing the chemical reaction of cement production using quicklime to absorb CO2 emissions, leading to the production of synthetic methane for clean energy. The study highlights the potential for a closed carbon loop where CO2 captured during synthetic methane combustion can be reused, contributing to carbon neutrality. The research group's modeling suggests that hydrogen sourced from coke oven gas outperforms renewably produced hydrogen in terms of synthetic methane production, energy efficiency, and economic profitability for carbon capture. With an abundance of coke oven gas in China due to the dominance of coal in the chemical industry, utilizing it as a transitional hydrogen source could be a cost-effective climate solution until cleaner alternatives become more affordable. The study emphasizes the importance of finding economically viable hydrogen sources to drive the success of hydrogen-driven calcium looping for carbon capture in industrial processes.