Functionalized organosilicate materials for irritant gas removal

2012 ◽  
Vol 68 (1) ◽  
pp. 376-382 ◽  
Author(s):  
Brandy J. Johnson ◽  
Brian J. Melde ◽  
Gregory W. Peterson ◽  
Bryan J. Schindler ◽  
Paulette Jones
Keyword(s):  
Gas Removal ◽  
Irritant Gas ◽  
Organosilicate Materials

Hexapod Pilot Tests Determine the Influence of 3D Motions on the Performance of an Amine-Based Acid Gas Removal Unit Installed on a Floating Support

2016 ◽  
Author(s):  
Perdu Gauthier ◽  
Salais Clément ◽  
Carlier Vincent ◽  
Prosernat S. A Weiss Claire ◽  
Maubert Thomas ◽  
...  
Keyword(s):  
Acid Gas ◽  
Gas Removal ◽  
Pilot Tests

Innovative energy and mass balance of a continuous evaporating crystallizer

2019 ◽  
pp. 646-654
Author(s):  
Jan Iciek ◽  
Kornel Hulak ◽  
Radosław Gruska
Keyword(s):  
Energy Balance ◽  
Mass Balance ◽  
Working Conditions ◽  
Crystallization Process ◽  
Heat Losses ◽  
Inert Gas ◽  
Gas Removal ◽  
Energy Balances ◽  
Heat Released ◽  
Mass And Energy Balances

The article presents the mass and energy balances of the sucrose crystallization process in a continuous evaporating crystallizer. The developed algorithm allows to assess the working conditions of the continuous evaporating crystallizers and the technological and energy parameters. The energy balance algorithm takes into account the heat released during the crystallization of sucrose, which was analyzed in this study, heat losses to the environment and heat losses due the vapor used for inert gas removal.

scholarly journals Land-Management Options for Greenhouse Gas Removal and Their Impacts on Ecosystem Services and the Sustainable Development Goals

2019 ◽  
Vol 44 (1) ◽  
pp. 255-286 ◽  
Author(s):  
Pete Smith ◽  
Justin Adams ◽  
David J. Beerling ◽  
Tim Beringer ◽  
Katherine V. Calvin ◽  
...  
Keyword(s):  
Sustainable Development ◽  
Ecosystem Services ◽  
Greenhouse Gas ◽  
Land Management ◽  
Wetland Restoration ◽  
Sustainable Development Goals ◽  
Management Options ◽  
Gas Removal ◽  
Development Goals ◽  
Greenhouse Gas Removal

Land-management options for greenhouse gas removal (GGR) include afforestation or reforestation (AR), wetland restoration, soil carbon sequestration (SCS), biochar, terrestrial enhanced weathering (TEW), and bioenergy with carbon capture and storage (BECCS). We assess the opportunities and risks associated with these options through the lens of their potential impacts on ecosystem services (Nature's Contributions to People; NCPs) and the United Nations Sustainable Development Goals (SDGs). We find that all land-based GGR options contribute positively to at least some NCPs and SDGs. Wetland restoration and SCS almost exclusively deliver positive impacts. A few GGR options, such as afforestation, BECCS, and biochar potentially impact negatively some NCPs and SDGs, particularly when implemented at scale, largely through competition for land. For those that present risks or are least understood, more research is required, and demonstration projects need to proceed with caution. For options that present low risks and provide cobenefits, implementation can proceed more rapidly following no-regrets principles.

Effects of supernovae feedback and black hole outflows in the evolution of Dwarf Spheroidal Galaxies

2020 ◽  
Vol 15 (S359) ◽  
pp. 280-282
Author(s):  
Gustavo Amaral Lanfranchi ◽  
Anderson Caproni ◽  
Jennifer F. Soares ◽  
Larissa S. de Oliveira
Keyword(s):  
Black Hole ◽  
Homogeneous Medium ◽  
Massive Black Hole ◽  
Dwarf Spheroidal Galaxies ◽  
Stellar Feedback ◽  
Gas Removal ◽  
The Galaxy ◽  
Main Driver ◽  
Ia Supernovae ◽  
Jet Structure

AbstractThe gas evolution of a typical Dwarf Spheroidal Galaxy is investigated by means of 3D hydrodynamic simulations, taking into account the feedback of type II and Ia supernovae, the outflow of an Intermediate Massive Black Hole (IMBH) and a static cored dark matter potential. When the IMBH’s outflow is simulated in an homogeneous medium a jet structure is created and a small fraction of the gas is pushed away from the galaxy. No jet structure can be seen, however, when the medium is disturbed by supernovae, but gas is still pushed away. In this case, the main driver of the gas removal are the supernovae. The interplay between the stellar feedback and the IMBH’s outflow should be taken into account.

Simulation of an Acid Gas Removal Unit Using a DGA and MDEA Blend Instead of a Single Amine

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Umer Zahid
Keyword(s):  
Energy Savings ◽  
Circulation Rate ◽  
Inlet Temperature ◽  
Acid Gas ◽  
Gas Processing ◽  
Gas Removal ◽  
Processing Plants ◽  
Operational Energy ◽  
Commercial Process ◽  
The Impact

AbstractMost of the industrial acid gas removal (AGR) units employ chemical absorption process for the removal of acid gases from the natural gas. In this study, two gas processing plants operational in Saudi Arabia have been selected where two different amines n1amely, diglycolamine (DGA) and monoethanol amine (MDEA) are used to achieve the sweet gas purity with less than 4 ppm of H2S. This study performed a feasibility simulation of AGR unit by utilizing the amine blend (DGA+MDEA) for both plants instead of a single amine. The study used a commercial process simulator to analyze the impact of process variables such as amine circulation rate, amine strength, lean amine temperature, regenerator inlet temperature, and absorber and regenerator pressure on the process performance. The results reveal that when the MDEA (0–15 wt. %) is added to DGA, marginal energy savings can be achieved. However, significant operational energy savings can be made when the DGA (0–15 wt. %) is blended with MDEA being the main amine.

Ethanethiol gas removal in an anoxic bio-scrubber

2019 ◽  
Vol 233 ◽  
pp. 612-625 ◽  
Author(s):  
Rasha Khalid Sabri Mhemid ◽  
Ilker Akmirza ◽  
Mohammed Salim Shihab ◽  
Mustafa Turker ◽  
Kadir Alp
Keyword(s):  
Gas Removal

scholarly journals Photo-resist Removal using Highly Concentrated Ozone Gas-Removal Characteristics of Various Resists-

2008 ◽  
Vol 21 (2) ◽  
pp. 311-316 ◽  
Author(s):  
Toshinori Miura ◽  
Mitsuru Kekura ◽  
Hideo Horibe ◽  
Masashi Yamamoto
Keyword(s):  
Gas Removal

scholarly journals Nasal high flow clears anatomical dead space in upper airway models

2015 ◽  
Vol 118 (12) ◽  
pp. 1525-1532 ◽  
Author(s):  
Winfried Möller ◽  
Gülnaz Celik ◽  
Sheng Feng ◽  
Peter Bartenstein ◽  
Gabriele Meyer ◽  
...  
Keyword(s):  
Dead Space ◽  
Cylindrical Tube ◽  
Upper Airway ◽  
Supplemental Oxygen ◽  
High Flow ◽  
Tube Model ◽  
Tracer Gas ◽  
Nasal Cavities ◽  
Gas Removal ◽  
Airway Model

Recent studies showed that nasal high flow (NHF) with or without supplemental oxygen can assist ventilation of patients with chronic respiratory and sleep disorders. The hypothesis of this study was to test whether NHF can clear dead space in two different models of the upper nasal airways. The first was a simple tube model consisting of a nozzle to simulate the nasal valve area, connected to a cylindrical tube to simulate the nasal cavity. The second was a more complex anatomically representative upper airway model, constructed from segmented CT-scan images of a healthy volunteer. After filling the models with tracer gases, NHF was delivered at rates of 15, 30, and 45 l/min. The tracer gas clearance was determined using dynamic infrared CO2 spectroscopy and 81mKr-gas radioactive gamma camera imaging. There was a similar tracer-gas clearance characteristic in the tube model and the upper airway model: clearance half-times were below 1.0 s and decreased with increasing NHF rates. For both models, the anterior compartments demonstrated faster clearance levels (half-times < 0.5 s) and the posterior sections showed slower clearance (half-times < 1.0 s). Both imaging methods showed similar flow-dependent tracer-gas clearance in the models. For the anatomically based model, there was complete tracer-gas removal from the nasal cavities within 1.0 s. The level of clearance in the nasal cavities increased by 1.8 ml/s for every 1.0 l/min increase in the rate of NHF. The study has demonstrated the fast-occurring clearance of nasal cavities by NHF therapy, which is capable of reducing of dead space rebreathing.

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