Ahmed S. Al-Fatesh, Ramakrishna Chava, Saba M. Alwan, Ahmed A. Ibrahim, Anis H. Fakeeha, Jehad K. Abu-Dahrieh, Ahmed Yagoub Elnour, Ahmed E. Abasaeed, Othman Al-Othman, Srinivas Appari
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引用次数: 0
摘要
本研究使用氧化锆改性氧化铝载体（S）研究了用于甲烷干转化（DRM）的镓促进镍催化剂。催化剂（Ni + (0-3) wt% Ga/S）采用湿浸渍法制备，并在 700 °C 煅烧 3 小时。在 TEM 中可以看到含有 Ga 的较小 Ni 颗粒。活性最高、最稳定的催化剂是 Ni + 2.0 Ga/S，600 °C 时的二氧化碳转化率为 35%，甲烷转化率为 28%，碳沉积较少（17%）。此外，还通过数学模型对 DRM 工艺进行了优化。该模型确定的最佳条件如下：温度（800 °C）、气体流速（GHSV-30,000 ml h-1gcat-1）和甲烷与二氧化碳的比例（1:1）。模型预测 CH4 和 CO2 转化率分别为 76.76% 和 82.0%，H2/CO 比率为 1.02，而实验结果显示 CH4 转化率为 74.56%，CO2 转化率为 83.25%，H2/CO 比率为 1.01。该模型与实验观测结果非常吻合，误差小于 3%。
Effect of Ga-Promoted on Ni/Zr + Al2O3 Catalysts for Enhanced CO2 Reforming and Process Optimization
In this study, zirconia-modified alumina support (S) was used to investigate Ga-promoted Ni catalysts for dry reforming of methane (DRM). The catalysts (Ni + (0–3) wt% Ga/S) were prepared using the wet impregnation method and calcined at 700 °C for 3 h. The inclusion of Ga enhanced the surface area, basicity, and metal-support interaction of the Ni-Ga/S catalysts. Smaller Ni particles containing Ga were seen in the TEM. The most active and stable catalyst was Ni + 2.0 Ga/S, having a conversion of 35% CO2 and 28% CH4 at 600 °C and displaying less (17%) carbon deposition. Furthermore, the DRM process was optimized by a mathematical model. The model determined the optimal conditions as follows: temperature (800 °C), gas flow rate (GHSV—30,000 ml h−1gcat−1), and methane to carbon dioxide ratio (1:1). The model predicts CH4 and CO2 conversions of 76.76% and 82.0%, respectively, and an H2/CO ratio of 1.02, compared to experimental results showing CH4 conversion at 74.56%, CO2 conversion at 83.25%, and an H2/CO ratio of 1.01. The model demonstrates excellent agreement with the experimental observations, exhibiting less than 3% error.
期刊介绍：
Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis.
The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.
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