Preparation of Ni/ZnCo2O4@ZnO composite metal oxide adsorbent and its adsorption desulfurization and regeneration performance

Q3 Energy

燃料化学学报 Pub Date : 2024-11-01 DOI:10.1016/S1872-5813(24)60463-9

Pu DAI , Mengya GUO , Hui GE , Caimei FAN , Xuekuan LI , Rui LI , Mingxing TANG

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引用次数: 0

Abstract

Metal Co was introduced into ZnO by co-precipitation to form composite metal oxides as the desulfurization agent with different Co contents, with which the desulfurization activity and regeneration performance were investigated. The systematic characterization of the structure and properties of the desulfurization agent using XRD, TEM, N₂ adsorption and desorption, XPS and H₂-TPR confirmed that the composite metal oxide desulfurization agent had the Ni/ZnCo₂O₄@ZnO structure. The formation of ZnCo₂O₄ in the composite metal oxides desulfurization agent facilitated the particle size reduction, dispersion enhancement and specific surface area increase of the desulfurization agent, which also acted as an adsorbent for H₂S indicated by the XRD analysis, improving the sulfur adsorption capacity of the desulfurization agent. The desulfurization performance of all the composite metal oxide desulfurization agents was higher than that of Ni/ZnO, in which the desulfurization agent NZCo-3 with a molar ratio of Zn:Co of 1:1 exhibited the optimal desulfurization performance, and the desulfurization rate was 100% at a reaction temperature of 300 °C, a hydrogen pressure of 3 MPa, a mass-air velocity of 2.2 h^–1, and a hydrogen-oil ratio of 300, and the excellent desulfurization performance was maintained after 6 cycles. The results of this study provide new ideas for the rational design of Ni/ZnO desulfurization agent to improve its desulfurization and regeneration performance.

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Ni/ZnCo2O4@ZnO 复合金属氧化物吸附剂的制备及其吸附脱硫和再生性能

通过共沉淀将金属 Co 引入 ZnO 中，形成不同 Co 含量的复合金属氧化物作为脱硫剂，并研究了其脱硫活性和再生性能。利用 XRD、TEM、N2 吸附和解吸、XPS 和 H2-TPR 对脱硫剂的结构和性能进行了系统表征，证实复合金属氧化物脱硫剂具有 Ni/ZnCo2O4@ZnO 结构。复合金属氧化物脱硫剂中 ZnCo2O4 的形成促进了脱硫剂粒径的减小、分散性的增强和比表面积的增加，XRD 分析表明，ZnCo2O4 也起到了吸附 H2S 的作用，提高了脱硫剂的硫吸附能力。所有复合金属氧化物脱硫剂的脱硫性能均高于 Ni/ZnO，其中 Zn:Co 摩尔比为 1:1 的脱硫剂 NZCo-3 的脱硫性能最佳，在反应温度为 300 ℃、氢气压力为 3 MPa、质量-空气速度为 2.2 h-1、氢油比为 300 的条件下，脱硫率为 100%，且 6 次循环后仍能保持良好的脱硫性能。该研究结果为合理设计 Ni/ZnO 脱硫剂以提高其脱硫和再生性能提供了新思路。

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来源期刊

燃料化学学报 Chemical Engineering-Chemical Engineering (all)

CiteScore

2.80

自引率

0.00%

发文量

5825

期刊介绍： Journal of Fuel Chemistry and Technology (Ranliao Huaxue Xuebao) is a Chinese Academy of Sciences(CAS) journal started in 1956, sponsored by the Chinese Chemical Society and the Institute of Coal Chemistry, Chinese Academy of Sciences(CAS). The journal is published bimonthly by Science Press in China and widely distributed in about 20 countries. Journal of Fuel Chemistry and Technology publishes reports of both basic and applied research in the chemistry and chemical engineering of many energy sources, including that involved in the nature, processing and utilization of coal, petroleum, oil shale, natural gas, biomass and synfuels, as well as related subjects of increasing interest such as C1 chemistry, pollutions control and new catalytic materials. Types of publications include original research articles, short communications, research notes and reviews. Both domestic and international contributors are welcome. Manuscripts written in Chinese or English will be accepted. Additional English titles, abstracts and key words should be included in Chinese manuscripts. All manuscripts are subject to critical review by the editorial committee, which is composed of about 10 foreign and 50 Chinese experts in fuel science. Journal of Fuel Chemistry and Technology has been a source of primary research work in fuel chemistry as a Chinese core scientific periodical.