Under cloud free conditions, the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) provides measurements of spectrally resolved limb radiances down to the upper troposphere. These are used to infer global distributions of mixing ratios of atmospheric constituents in the upper troposphere and the stratosphere. From 21 October to 12 November 2003, MIPAS observed enhanced amounts o...

Cyclic solvent injection, known as huff-n-puff, is one of the promising techniques for enhancing oil recovery from shale reservoirs. This study investigates huff-n-puff performance in ultratight reservoirs by conducting large-scale numerical simulations a wide range reservoir fluid types (retrograde condensate, volatile oil, and black oil) different injection gases (CO2, C2H6, C3H8). A dual-por...

One hundred and thirty-five soil samples were collected from a depth of 2–2.5 m near oil and gas fields of Tatipaka, Pasarlapudi, Ponnamanda, Kaza and Palakollu areas of Krishna–Godavari Basin, Andhra Pradesh, India and were analysed for light hydrocarbon gases. The adsorbed soil gas analysis showed the presence of moderate to low concentrations of methane (CH4; 2–83 ppb), ethane (C2H6; 1–92 pp...

The development of a continuous wave (CW), thermoelectrically cooled (TEC), distributed feedback (DFB) laser diode based spectroscopic trace-gas sensor for ultrasensitive and selective ethane (C2H6) concentration measurements is reported. The sensor platform used tunable diode laser absorption spectroscopy (TDLAS) based on a 2f wavelength modulation (WM) detection technique. TDLAS was performed...

We present RPMDrate, a computer program for the calculation of gas phase bimolecular reaction rate coefficients using the ring polymer molecular dynamics (RPMD) method. The RPMD rate coefficient is calculated using the Bennett-Chandler method as a product of a static (centroid density quantum transition state theory (QTST) rate) and a dynamic (ring polymer transmission coefficient) factor. The ...

We quantified eight parent volatiles (H2O, C2H6, HCN, CO, CH3OH, H2CO, C2H2, and CH4) in the Jupiter-family comet Tempel 1 using high-dispersion infrared spectroscopy in the wavelength range 2.8 to 5.0 micrometers. The abundance ratio for ethane was significantly higher after impact, whereas those for methanol and hydrogen cyanide were unchanged. The abundance ratios in the ejecta are similar t...

Precise calculations of the coexistence-curve diameters of a hard-core square-well (HCSW) fluid and the restricted primitive model (RPM) electrolyte exhibit marked deviations from rectilinear behavior. The HCSW diameter displays a |t| singularity that sets in sharply for |t| ≡ |T −Tc|/Tc . 10; this compares favorably with extensive data for SF6, also reflected in C2H6, N2, etc. By contrast, the...

In the last decade, much work has been done to better understand methane (CH4) emissions from oil and gas (O&G) industry in United States. Ethane (C2H6), a that is co-emitted with thermogenic sources of CH4, emitted US predominantly by O&G sector. this study, we perform an inverse analysis on 200 h atmospheric boundary layer C2H6 measurements estimate Measurements were collected 2017 2019 as pa...