Preparation of Sorbent Loaded with Nano-CuO for Room Temperature to Remove of Hydrogen Sulfide

Abstract:

In this paper, an efficient metal oxide sorbents for the deep removal of H₂S were synthesized using equal volume impregnation (EVIM) method. Modified coconut shell charcoal was selected as support to deposite the particles of copper oxide onto the surface. And copper nitrate were selected as the active component precursors in the preparation process of sorbents. Sorption experiments were carried out at room temperature in fixed-bed reactor. The grain size and crystal form of loading metals were characterized by X-ray diffraction (XRD). We investigated the effects of modifier onto coconut shell charcoal, load rate of metal oxide and calcination temperature on the desulfurization activity of the sorbent. Results show that the best modifier for coconut shell charcoal is KOH, which is significantly better than the other modifiers. And the optimum load rate is 20%(wt), the optimum calcination temperature is 300°C. Copper oxide onto the surface of modified coconut shell charcoal proved to be monoclinic nanoparticles with grain size of 18.7nm. Sulfidation test was carried out on the condition of i) the concentration of hydrogen sulfide gas (mixed with nitrogen ) is 1024.2ppm and ii) gas velocity is 20ml/min, iii) 0.1g sample in the middle of the fixed-bed reactor (length: 450 mm, interior diameter: 5 mm) to test. The sample show excellent sulfur removal efficiency and its breakthrough time is up to 287 min on this condition.

• Periodical: Applied Mechanics and Materials (Volumes 475-476)
• Pages: 1329-1333
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.475-476.1329
• Online since: December 2013
• Authors: Fen Li*, Jin Wei, Ying Yang, Guang Hui Yang, Tao Lei
• Keywords: Hydrogen Sulfide, Load, Nano-CuO, Sorbent

References

[1] R. B. Slimane, J. Abbasian. Copper-Based Sorbents for Coal Gas Desulfurization at Moderate Tempera- tures [J]. Ind. Eng. Chem. Res, 39: 1338-1344 (2000).

DOI: 10.1021/ie990877a

[2] B. Qiu, L. Han, and J. Wang et al. Preparation of Sorbents Loaded on Activated Carbon to Remove H2S from Hot Coal Gas by Supercritical Water Impregnation[J]. Energy Fuels , 25: 591–595 (2011).

DOI: 10.1021/ef101358x

[3] T. Kyotani, H. Kawashima, and A. Tomita: High-Temperature Desulfurizing Reaction with Cu Containing Sorbents [J]. Environ. Sci. Technol, 23: 218-223 (1989).

DOI: 10.1021/es00179a014

[4] M. Y. Jia, X. L. Ding, and S. G. He , et al. Experimental and Theoretical Study of the Reactions between MO2− (M = Fe, Co, Ni, Cu, and Zn) Cluster Anions and Hydrogen Sulfide[J]. J. Phys. Chem. A, 117: 8377−8387 (2013).

DOI: 10.1021/jp4044623

[5] X. Zheng, W. Bao, and L. Chang et al. Interaction among Metal Components of Zn − Mn−Cu-Based Sorbents Prepared by High Pressure Impregnation Method and Its Effect on the Removal of H2S from Hot Coal Gas [J]. Energy Fuels, 26: 3393−3398 (2012).

DOI: 10.1021/ef202011e

[6] D. Karayilan, T. Dogu, S. Yasyerli et al. Mn-Cu and Mn-Cu-V Mixed-Oxide Regenerable Sorbents for Hot Gas Desulfurization [J]. Ind. Eng. Chem. Res, 44: 5221-5226 (2005).

DOI: 10.1021/ie0492496