Desulfurization performance of iron-manganese-based sorbent for hot coal gas

doi:10.1007/s11705-010-0504-y

Front Chem Eng Chin

2010, Vol. 4

Issue (4) : 429-434 https://doi.org/10.1007/s11705-010-0504-y

RESEARCH ARTICLE

Desulfurization performance of iron-manganese-based sorbent for hot coal gas

Xiurong REN, Weiren BAO, Fan LI, Liping CHANG(

), Kechang XIE

Key Laboratory of Coal Science and Technology, Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, China

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Abstract

A series of iron-manganese-based sorbents were prepared by co-precipitation and physical mixing method, and used for H₂S removal from hot coal gas. The sulfidation tests were carried out in a fixed-bed reactor with space velocity of 2000 h^-1(STP). The results show that the suitable addition of manganese oxide in iron-based sorbent can decrease H₂S and COS concentration in exit before breakthrough due to its simultaneous reaction capability with H₂S and COS. Fe₃O₄ and MnO are the initial active components in iron-manganese-based sorbent, and FeO and Fe are active components formed by reduction during sulfidation. The crystal phases of iron affect obviously their desulfurization capacity. The reducibility of sorbent changes with the content of MnO in sorbent. S7F3M and S3F7M have bigger sulfur capacities (32.68 and 32.30 gS/100 g total active component), while S5F5M has smaller sulfur capacity (21.92 gS/100 g total active component). S7F3M sorbent has stable sulfidation performance in three sulfidation-regeneration cycles and no apparent structure degradation. The sulfidation performance of iron- manganese-based sorbent is also related with its specific surface area and pore volume.

Keywords iron-manganese-based sorbent sulfidation performance regeneration hot coal gas

Corresponding Author(s): CHANG Liping,Email:lpchang@tyut.edu.cn

Issue Date: 05 December 2010

Cite this article:

Xiurong REN,Weiren BAO,Fan LI, et al. Desulfurization performance of iron-manganese-based sorbent for hot coal gas[J]. Front Chem Eng Chin, 2010, 4(4): 429-434.

URL:

https://academic.hep.com.cn/fcse/EN/10.1007/s11705-010-0504-y
https://academic.hep.com.cn/fcse/EN/Y2010/V4/I4/429

Fig.1 Schematic diagram of experimental setup

Tab.1 Gas composition for sulfidation and regeneration (vol-%)

Fig.2 Breakthrough curves of sorbents with different Fe/Mn atomic ratios at 500°C

Tab.2 Physical parameter of fresh and pre-reduced sorbents

Fig.3 a SiO; e MnO; g MnS; h FeO; i FeS or FeS; j FeC
XRD patterns of sulfided samples

Fig.4 Breakthrough curves of S7F3M at different temperature

Fig.5 H-TPR patterns of sorbents SF, SM and S7F3M

Fig.6 a SiO; g MnS; h FeO; i FeS or FeS; j FeC
XRD patterns of sulfided S7F3M at different temperatures

Fig.7 Sulfidation breakthrough curves of S7F3M in three cycles

Tab.3 Compressive strength of S7F3M after every sulfidation-regeneration cycles

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