PSS sorbents for removing trace hydrogen sulfide in methane

doi:10.1007/s11705-010-0569-7

Front Chem Sci Eng

2011, Vol. 5

Issue (3) : 339-342 https://doi.org/10.1007/s11705-010-0569-7

RESEARCH ARTICLE

PSS sorbents for removing trace hydrogen sulfide in methane

Limei ZHONG¹(

), Li ZHOU²

1. Qingdao University of Science & Technology, Qingdao 266042, China; 2. High Pressure Adsorption Laboratry, Tianjin University, Tianjin 300072, China

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Abstract

Sorbents of the pressure swing sorption process (PSS) to remove trace amount of H₂S (190 ppm) contained in methane were experimentally studied. The sorbents consist of adsorbent carrier (silica gel or activated carbon) and absorbent which spreads outside the carrier granules’ pores (triethanolamine, TEA or N-methyl-2-pyrrolidone, NMP). The results of breakthrough and regeneration tests show that silica gel is more suitable to be the carrier than activated carbon and TEA is more suitable to be the absorbent than NMP. The loaded absorbent could enlarge the sorption capacity of H₂S considerably. And the BET tests indicate that the absorbent deposits on the surface of the carrier’s pores and can reduce the mesopores’ size and block the micropores.

Keywords pressure swing sorption H₂S methane carrier absorbent

Corresponding Author(s): ZHONG Limei,Email:zhonglimei@qust.edu.cn

Issue Date: 05 September 2011

Cite this article:

Limei ZHONG,Li ZHOU. PSS sorbents for removing trace hydrogen sulfide in methane[J]. Front Chem Sci Eng, 2011, 5(3): 339-342.

URL:

https://academic.hep.com.cn/fcse/EN/10.1007/s11705-010-0569-7
https://academic.hep.com.cn/fcse/EN/Y2011/V5/I3/339

Tab.1 Physical properties of the silica gel and JX-104

Tab.2 Physical properties of NMP and TEA

Fig.1 Schematic flowchart of the experiment. PR, pressure regulator; MFC, mass flow controller; PT, pressure transducer; BP, backpressure valve; 3WV, three-way valve; V1-V16, valves.

Fig.2 Schematic apparatus for adsorption of N at 77 K

Fig.3 Breakthrough curves of JX-104 with 26% TEA

Fig.4 Breakthrough curves of silica gel with 26% TEA

Fig.5 Breakthrough curves of silica gel with 26% TEA and NMP

Fig.6 Regeneration curves of silica gel with 26% TEA and NMP

Fig.7 Adsorption isotherms of N on the sorbents at 77 K

Tab.3 Specific surface area and pore volume of the adsorbents

Fig.8 Pore size distribution of the sorbents

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