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乙炔的催化反应:重新审视化学工业的原料

更新时间:2026-09-28 11:55:11 大小:2M 上传用户:ddtjdnd查看TA发布的资源 标签:乙炔催化反应化工原料碳化钙合成反应 下载积分:2分 评价赚积分 (如何评价?) 打赏 收藏 评论(0) 举报

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Catalytic Reactions of Acetylene: A Feedstock for the Chemical Industry Revisited


Acetylene is an important chemical raw material produced by the reaction of CaC2 and water. During the synthesis reaction process of calcium carbide, the coke formed from the highly alkaline coal and limestone results in a large amount of ash, which not only increases energy consumption but also significantly affects the purity of CaC2. In order to explore the effect of ash on CaC2, first, CaC2 was synthesized by a high-temperature solid-state reaction, and its purity was identified. XRD results indicate that the main phase of this crystal is CaC2 with a space group of I4/mmm. To further investigate the adsorption properties of inorganic minerals on CaC2 surfaces, the adsorption of the alkali metals Na and K from the ash to the CaC2 surface was calculated by Density Functional Theory (DFT) calculations. The surface energy calculation results demonstrate that CaC2 has the lowest energy and most stable crystal faces, which are in good agreement with the experimental results. Among them, on the crystalline face (110), the most stable configuration for Na is the Ca−C bridge site, while the most stable configuration for K is the Ca−Ca bridge site. The atomic population and charge density difference values show that the charge transfer of K on the CaC2 surface is significantly larger than that of Na. PD

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