Configuring hydrogen lancing to reduce carbon and nitrogen oxides emissions from coal-fired rotary kilns
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| Title: | Configuring hydrogen lancing to reduce carbon and nitrogen oxides emissions from coal-fired rotary kilns |
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| Authors: | Colin, Samuel, Triana de Las Heras, Francisco Javier, Normann, Fredrik, Johansson, Andreas, Fernberg, Johannes, Sepman, Alexey, Wennebro, Jonas, Wiinikka, Henrik |
| Source: | International journal of hydrogen energy. 120:323-332 |
| Subject Terms: | Coal combustion, Hydrogen fuels, Ignition, Rotary kilns, Carbon oxide emissions, Co-firing, Decarbonation, Gaseous Fuel, Integrated burner, Lancing, Nitrogen oxide emissions, Photograph and video analyze, Solid fuels, Video analysis, Coal |
| Description: | Coal replacement with hydrogen is a strategy for reducing carbon emissions from high-temperature industrial processes. Hydrogen lancing is a direct way for introducing hydrogen to existing coal-fired kilns. This work investigates the effects of hydrogen lancing on nitrogen oxides (NOx) emissions and ignition behaviour in a pilot-scale furnace that employs a 30 % coal replacement with hydrogen lancing. The investigation encompasses the impacts of lancing distance, angling, and velocity. Advanced measurement techniques, including spectrometry and monochromatic digital cameras, characterise the flame and assess emissions. The results indicate that the 30 % coal replacement by hydrogen lancing enhances combustion and reduces the emissions of carbon monoxides (CO). The flame characteristics vary with the location of the hydrogen injection, generally becoming more-intense than during coal combustion. NOx emissions during lancing are similar or up to double the emissions observed for pure coal combustion, depending on the lancing configuration. Increasing the distance between the hydrogen lance and coal burner increases NOx emissions. |
| File Description: | electronic |
| Access URL: | https://urn.kb.se/resolve?urn=urn:nbn:se:ri:diva-78376 https://doi.org/10.1016/j.ijhydene.2025.03.322 |
| Database: | SwePub |
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Nájsť tento článok vo Web of Science | Abstract: | Coal replacement with hydrogen is a strategy for reducing carbon emissions from high-temperature industrial processes. Hydrogen lancing is a direct way for introducing hydrogen to existing coal-fired kilns. This work investigates the effects of hydrogen lancing on nitrogen oxides (NOx) emissions and ignition behaviour in a pilot-scale furnace that employs a 30 % coal replacement with hydrogen lancing. The investigation encompasses the impacts of lancing distance, angling, and velocity. Advanced measurement techniques, including spectrometry and monochromatic digital cameras, characterise the flame and assess emissions. The results indicate that the 30 % coal replacement by hydrogen lancing enhances combustion and reduces the emissions of carbon monoxides (CO). The flame characteristics vary with the location of the hydrogen injection, generally becoming more-intense than during coal combustion. NOx emissions during lancing are similar or up to double the emissions observed for pure coal combustion, depending on the lancing configuration. Increasing the distance between the hydrogen lance and coal burner increases NOx emissions. |
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| ISSN: | 03603199 18793487 |
| DOI: | 10.1016/j.ijhydene.2025.03.322 |