Abstract: A system for removing carbon dioxide from flow of gas having carbon dioxide including a venturi eductor configured to receive the flow of gas having carbon dioxide therein and a flow of an alkaline solution at a predetermined pH range. The venturi eductor is configured to introduce and mix the flow of gas having carbon dioxide therein into the flow of the alkaline solution to induce the transfer of the carbon dioxide into a carbonic acid solution and the subsequent conversion of the carbonic acid solution into a solution having metal carbonate therein. A reactor is coupled to the venturi eductor includes a volume of the alkaline solution and is configured to provide sufficient reaction time to augment the transfer of carbon dioxide into the carbonic acid solution and the subsequent conversion of the carbonic acid solution into a solution having metal carbonate therein and output a flow of treated gas having a majority of the carbon dioxide removed.

Abstract: Presented herein are systems and methods for quantifying trace and/or ultra-trace levels of a species—for example, H2S or H2O—in a natural gas line. The systems and methods employ a tunable laser, such as a tunable diode laser, vertical-cavity surface-emitting laser (VCSEL), external cavity diode laser or a vertical external-cavity surface-emitting laser (VECSEL) or a tunable quantum cascade laser (QCL). The laser produces an output beam over a set of one or more relatively narrow, high resolution wavelength bands at a scan rate from about 0.1 Hz to about 1000 Hz. A natural gas sample comprising a trace level of a species of interest passes through a flow cell into which the output beam from the laser is guided. An optical detector receives light from the flow cell, producing a signal indicative of the absorption attenuation from which the concentration of the trace species is determined.

Abstract: Presented herein are systems and methods for quantifying trace and/or ultra-trace levels of a species—for example, H2S or H2O—in a natural gas line. The systems and methods employ a tunable laser, such as a tunable diode laser, vertical-cavity surface-emitting laser (VCSEL), external cavity diode laser or a vertical external-cavity surface-emitting laser (VECSEL) or a tunable quantum cascade laser (QCL). The laser produces an output beam over a set of one or more relatively narrow, high resolution wavelength bands at a scan rate from about 0.1 Hz to about 1000 Hz. A natural gas sample comprising a trace level of a species of interest passes through a flow cell into which the output beam from the laser is guided. An optical detector receives light from the flow cell, producing a signal indicative of the absorption attenuation from which the concentration of the trace species is determined.