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Title: INTRODUCTION TO GAS QUALITY USING SPECTROSCOPY
Author: Sohrab Zarrabian
Source: 2022 Appalachian Gas Measurement Short Course
Year Published: 2022
Abstract: Optical spectroscopy is an established group of tech- niques. These methods all share a fundamental common feature they use the interaction of electromagnetic waves (e.g. light) with materials to deduce information about the make-up of the material under analysis. Optical spectroscopy has been around for almost 100 years. Despite this relatively long history, practical indus- trial applications in the industry have been somewhat of a more recent trend. Field applications (outside of laborato- ries) have been even more recent phenomena. In the last 20 years, advances in optical components, computing power, and display technologies have worked hand in hand to enable many new applications of field- deployed spectroscopy in many different industries. Wide ranging applications in medical, semi- conductor, envi- ronmental, materials, pharmaceutical, food, and energy industries have emerged making significant contributions to safety and efficiency in these industries. Applications in natural gas analysis have been one of the more recent areas of development. However, these ap- plications are rapidly growing in both breadth and depth of analytical power applied to natural gas analysis. Optical spectroscopy enjoys a fundamental advantage over most other methods. This advantage can be summa- rized in the non-invasive nature of optical spectroscopy. Using photons to determine the quality of materials (in- cluding gas) is in almost all cases non-invasive. Further- more, since the sensor is not in direct contact with the analyte, it will not undergo a change or drift. Therefore, the calibrations or adjustments become less frequent or non- existent. This is a tremendous advantage in the energy sector, where analyzers are installed in remote places and cannot be monitored or adjusted on a day to day basis.

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