Hollow Fiber Coupler for Hydrogen Sulfide Spectral Analysis

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Hydrogen Sulfide (H2S) needs to be closely monitored in natural gas production, transportation and storage. The nature of the work is to conduct initial study toward a precision spectroscopy analyzer that can identify and quantify H2S concentrations as low as several parts per million in natural gas. In this project, a hollow core fiber and a regular fiber fused optical directional coupler will be used to efficiently collect the samples on-site and conduct realtime spectral measurements. In particular, we will conduct spectral analysis on both absorption and Raman spectroscopy and compare their relative advantages and disadvantages. In order to quantify chemical concentrations in higher accuracy in cluttered environments, machine learning algorithms will be adopted for both absorption and Raman spectral analysis. We will compare the sensitivity, resolution and detection limit in cluttered environment between both spectrscopic methods and make recommendations to Envent Engineering Ltd. on the suitable choices for their related product. The anticipated outcome, once proven positive, will help Envent Engineering Ltd. to provide oil industry the capacity to monitor H2S concentrations at a precision, sensitivity and limit of detection that is currently unavailable. The successful execution of the project will further strength the collaboration with Envent with future extension for monitoring other chemical substance such as methane, Tert-Butyl Mercaptan, Methyl Sulfide, etc. The implementation of the proposed technology will help the industry to ensure these chemical contents in natural gas at a permissive level. The successful control of them through this proposed technology will benefit the industry to reduce the instrument maintenance cost for production, transportation and storage and reduce the greenhouse emission source to counter-fight the climate change. It will also help the industry to abide the requirement set by the government to protect our environment. The training of the students in the project will provide Canadian industry highly qualified personnels, which is critical for Canadian industry leading in the field.