Faculty of Mechanical Engineering, Yildiz Technical University, Istanbul, Turkey.
Faculty of Mechanical Engineering, Yildiz Technical University, Istanbul, Turkey.
Chemosphere. 2023 Jul;329:138671. doi: 10.1016/j.chemosphere.2023.138671. Epub 2023 Apr 11.
In this study, an experimental investigation is conducted to analyze the effect of adding hydrogen into natural gas on emissions and the burning performance of the obtained blends. Natural gas alone and natural gas-hydrogen blends are burned in identical gas stoves, and the emitted CO, CO, and NO are measured. The base case with natural gas only is compared with the natural gas and hydrogen blends (including hydrogen additions of 10%, 20% and 30% volumetrically). The experimental results show that the combustion efficiency increases from 39.32% to 44.4% by enhancing the hydrogen blending ratio from 0 to 0.3. While CO and CO emissions are reduced with rising the hydrogen ratio in the blend, NO emissions have a fluctuating trend. Moreover, a life cycle analysis is performed to determine the environmental impact of the considered blending scenarios. With the blending ratio of 0.3 hydrogen by volume, global warming potential decreases from 6.233 to 6.123 kg CO equivalents per kg blend, and acidification potential reduces from 0.0507 to 0.04928 kg SO equivalents per kg blend in comparison with natural gas. On the other hand, human toxicity, abiotic depletion, and ozone depletion potentials per kg blend show slight augmentation from 5.30 to 5.52 kg 1,4-dichlorobenzene (DCB) eq., 0.0000107 to 0.00005921 kg SB eq., and 3.17 × 10 to 5.38 × 10 kg CFC-11 eq., respectively.
在这项研究中，进行了一项实验研究，以分析向天然气中添加氢气对排放物和所得混合物燃烧性能的影响。单独燃烧天然气和天然气-氢气混合物在相同的燃气炉中进行，并测量排放的 CO、CO 和 NO。将仅使用天然气的基础情况与天然气和氢气混合物（包括体积比为 10%、20%和 30%的氢气添加量）进行比较。实验结果表明，通过将氢气混合比从 0 提高到 0.3，燃烧效率从 39.32%提高到 44.4%。虽然随着混合物中氢气比例的增加，CO 和 CO 排放量减少，但 NO 排放量呈波动趋势。此外，还进行了生命周期分析以确定所考虑的混合方案的环境影响。在体积比为 0.3 的氢气混合比下，与天然气相比，全球变暖潜势从 6.233 千克 CO 当量/千克混合物降低到 6.123 千克 CO 当量/千克混合物，酸化潜势从 0.0507 千克 SO 当量/千克混合物降低到 0.04928 千克 SO 当量/千克混合物。另一方面，与天然气相比，每千克混合物的人类毒性、非生物消耗和臭氧消耗潜势分别从 5.30 千克 1,4-二氯苯（DCB）当量增加到 5.52 千克 1,4-二氯苯（DCB）当量，从 0.0000107 千克 SB 当量增加到 0.00005921 千克 SB 当量，从 3.17×10 千克 CFC-11 当量增加到 5.38×10 千克 CFC-11 当量。
