Department of Aerospace Engineering, College of Engineering, Chosun University, 309, Pilmun-daero, Dong-gu, Gwangju, 61452, Republic of Korea.
Department of Chemical and Biomolecular Engineering, Sogang University, 35, Baekbeom-ro, Mapo-gu, Seoul, 04107, Republic of Korea.
J Nanosci Nanotechnol. 2021 Jul 1;21(7):3858-3862. doi: 10.1166/jnn.2021.19187.
The effects of discharge conditions and catalysts on CO₂ methanation under the plasma were investigated via transmission FTIR and OES analysis. The bare Al₂O₃, Ni/Al₂O₃ and Ru/Al₂O₃ catalysts were coated on the ZnSe window using the modified sol-gel method for transmission FTIR analysis. It was confirmed from the OES analysis that the intensity of excited hydrogen increased in all catalysts as the discharge frequency and voltage increased, and the increment of H+ peak intensity was the largest in the Ru/Al₂O₃ catalyst. In addition, it was found from the transmission FTIR analysis that the O-H band was all disappeared as the frequency and voltage increased. In conclusion, the increased H+ with the decomposition of O-H led to the increase in the CH₄ conversion, resulting in the highest CH₄ conversion in the Ru/Al₂O₃ catalyst.
通过传输傅里叶变换红外光谱（FTIR）和光谱分析研究了放电条件和催化剂对等离子体下 CO₂甲烷化的影响。采用改进的溶胶-凝胶法将裸氧化铝、镍/氧化铝和钌/氧化铝催化剂涂覆在 ZnSe 窗上，用于传输 FTIR 分析。通过光谱分析证实，随着放电频率和电压的增加，所有催化剂中激发态氢的强度都增加，并且在 Ru/Al₂O₃催化剂中 H+峰强度的增加最大。此外，通过传输 FTIR 分析发现，随着频率和电压的增加，O-H 带全部消失。总之，随着 O-H 的分解产生更多的 H+，导致 CH₄转化率增加，从而使 Ru/Al₂O₃催化剂的 CH₄转化率最高。
