Spectroscopy of molecular gases in the medium and far infrared using optical frequ...
| Grant number: | 14/10125-8 |
| Support type: | Scholarships abroad - Research Internship - Doctorate |
| Effective date (Start): | January 20, 2015 |
| Effective date (End): | January 19, 2016 |
| Field of knowledge: | Physical Sciences and Mathematics - Chemistry - Analytical Chemistry |
| Principal Investigator: | Celio Pasquini |
| Grantee: | Francisco Senna Vieira |
| Supervisor abroad: | Scott A. Diddams |
| Home Institution: | Instituto de Química (IQ). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil |
| Local de pesquisa : | National Institute of Standards and Technology (NIST), United States |
| Associated to the scholarship: | 13/00502-6 - Analytical methods based on terahertz spectroscopy and development of a continuous-wave terahertz spectrometer, BP.DR |
Abstract Water vapor in natural gas imparts serious problems regarding transportation and storage. Small amounts of water, along with species such as CO2 or H2S, cause corrosion of pipes and containers. Moreover, water may lead to the formation of gas hydrates - clathrates - which can clog the pipes. Among the existing methods for quantifying moisture in natural gas, chilled mirror hygrometry and Karl Fischer titration stand as the most widely accepted reference methods. However, those methods present some limitations, such as interference from H2S and the impossibility of being implemented on-line. Terahertz continuous-wave (THz-CW) spectroscopy based on photomixers enables the detection of gases with high selectivity and sensitivity. In this project, it is proposed the development and evaluation of a THz-CW spectrometer for analyzing natural gas. (AU) | |