ISSN:
1662-9779
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Physics
Notes:
Nanocrystalline ZnO powders, whose crystalline sizes were 14.3, 21.2,24.1, and 35.3 nm, respectively, were prepared by homogeneous precipitation process.Nanocrystalline ZnO powders were characterized with powder X-ray diffractometer(XRD), transmission electron microscopy (TEM) and X ray photoelectronspectroscopy (XPS). The performance of desulfurization of H2S at room temperaturewas investigated. Results demonstrated that the smaller the size of nanocrystallineZnO, the darker the color of desulfurization products would be, which was moresimilar to the characteristics of multi-sulfide results, indicating that the mechanism ofdesulfurization of nanocrystalline ZnO was not the same as that of the analytical pureZnO. Nanocrystalline ZnO improved the performance of desulfurization of H2S atroom temperature, and the activity time of nanocrystalline ZnO (14.3 nm) for thedesulfurization was 34 times that of analytical pure ZnO at absence of oxygen. Whenthe oxygen was present in reaction, the accuracy of desulfurization was improved, inwhich H2S was prone to be oxidized into element S, and SO2 was not detected atoutlet of the reactor
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/23/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.121-123.1325.pdf
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