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Performance evaluation of zero-valent iron nanoparticles (NZVI) for high-concentration H2S removal from biogas at different temperatures
| Content Provider | Semantic Scholar |
|---|---|
| Author | Su, Lianghu Liu, Chenwei Liang, Kangkang Chen, Yudong Zhang, Longjiang Li, Xiaolin Han, Zhihua Zhen, Guangyin Chai, Xiaoli |
| Copyright Year | 2018 |
| Abstract | The removal performance of high-concentration H2S (ca. 10 000 ppm) from simulated biogas by zero-valent iron nanoparticles (NZVI), with the majority of the particles in the size range of 60–150 nm, at different reaction temperatures (room temperature, 100 °C, 200 °C and 250 °C) were evaluated using a custom-designed quartz fixed-bed reactor. The results showed that the H2S removal capacities of NZVI were quite limited at room temperature and 100 °C, being 12.56 and 14.77 mg H2S gNZVI−1, respectively. However, these values increased significantly to 391.02 (200 °C) and 488.95 (250 °C) mg H2S gNZVI−1. Scanning electron microscopy analysis showed that the products of the NZVI–H2S reaction aggregated to form irregular polygonal-shaped structures. The main X-ray diffraction pattern peaks of the product matched well with troilite, and no pyrite was observed. The deconvolution of the X-ray photoelectron spectrometry peaks showed the presence of monosulphide (S2−) and disulphide (S22−) in the product, in which 36% of the sulphur existed as monosulphide and 64% as disulphide. It is proposed that the effective removal of hydrogen sulphide by NZVI at elevated temperatures can be attributed to the combination of nano-constituents, oxide shell and underlying Fe core to produce FeS similar to troilite and amorphous FeS2. |
| Starting Page | 13798 |
| Ending Page | 13805 |
| Page Count | 8 |
| File Format | PDF HTM / HTML |
| DOI | 10.1039/C7RA12125C |
| Volume Number | 8 |
| Alternate Webpage(s) | https://pubs.rsc.org/en/content/articlepdf/2018/ra/c7ra12125c |
| Alternate Webpage(s) | https://doi.org/10.1039/C7RA12125C |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
