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Title: | Organic and inorganic sulphur compounds releases from high-pyrite coal pyrolysis in H-2, N-2 and CO2: Test case Chinese LZ coal | Authors: | Gu, Ying YPERMAN, Jan VANDEWIJNGAARDEN, Jens REGGERS, Guy CARLEER, Robert |
Issue Date: | 2017 | Publisher: | ELSEVIER SCI LTD | Source: | FUEL, 202, p. 494-502 | Abstract: | The effects of different atmospheres on the distribution of organic and inorganic sulphur compounds during high-pyrite coal pyrolysis were investigated. Sulphur compound releases were determined by atmospheric pressure-temperature programmed reduction (AP-TPR) "on-line" coupled with MS and AP-TPR "off-line" coupled with TD-GC/MS, which is a reliable technique for coal sulphur characterization. The results show that the decomposition of both organic and inorganic sulphur is different in the three applied atmospheres: H-2, N-2 and CO2. In H-2, most sulphur from LZ coal is hydrogenated/reduced to H2S, decomposition of inorganic sulphur (pyrite and sulphates) has a great effect on the formation of H2S. It not only enhances the intensity of its m/z 34 signal but also shifts the peak maximum of its profile to a higher temperature, even without a returning to the base line. In inert N-2 gas, as expected, hydrogenation of some sulphur compounds such as less-reactive di-aryl sulphur species and simple thiophenic structures are highly limited. The dominant peak of m/z 34 can also be related to the reduction of pyrite. In CO2, coal sulphur is mainly converted into SO2/SO, because CO2 is a more reactive gas and rather acts as an oxidizing agent. Decomposition of organic sulphonic acids occurs before 500 degrees C and of sulphonics/ sulphoxides after 500 degrees C. The decomposition of sulphates and pyrite is better detectable in CO2 than in inert gas atmosphere. After 800 degrees C char gasification in CO2 results in further decomposition of sulphur compounds and lower sulphur retention. (C) 2017 Elsevier Ltd. All rights reserved. | Notes: | [Gu, Ying] Zhejiang Ocean Univ, Zhoushan 316022, Peoples R China. [Yperman, Jan; Vandewijngaarden, Jens; Reggers, Guy; Carleer, Robert] Hasselt Univ, CMK, Res Grp Appl & Analyt Chem, Agoralaan Gebouw D, B-3590 Diepenbeek, Belgium. | Keywords: | Sulphur; AP-TPR; Coal; High-pyrite; CO2; MS; TD-GC/MS;sulphur; AP-TPR; coal; high-pyrite; CO2; MS; TD-GC/MS | Document URI: | http://hdl.handle.net/1942/24315 | ISSN: | 0016-2361 | e-ISSN: | 1873-7153 | DOI: | 10.1016/j.fuel.2017.04.068 | ISI #: | 000404078500050 | Rights: | (c) 2017 Elsevier Ltd. All rights reserved. | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2018 |
Appears in Collections: | Research publications |
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