Meteorological variables and concentrations of helium, carbon dioxide, and oxygen in soil gases collected regularly at a single site for more than a year

1987 ◽  
Author(s):  
M.E. Hinkle ◽  
J.L. Ryder
Keyword(s):  
Carbon Dioxide ◽  
Single Site ◽  
Meteorological Variables ◽  
Soil Gases

A phenanthroline-based porous organic polymer for the iridium-catalyzed hydrogenation of carbon dioxide to formate

2019 ◽  
Vol 7 (23) ◽  
pp. 14019-14026 ◽  
Author(s):  
Gunniya Hariyanandam Gunasekar ◽  
Sungho Yoon
Keyword(s):  
Carbon Dioxide ◽  
Functional Groups ◽  
Single Site ◽  
Organic Polymer ◽  
Selective Catalyst ◽  
Porous Organic Polymer ◽  
Highly Active ◽  
First Time ◽  
Hydrogenation Of Carbon Dioxide ◽  
Hydrogenation Of Co

A novel phenanthroline-functionalized porous organic polymer (phen-POP) has been designed, and prepared for the first time without other reactive functional groups in the polymer skeleton. Post-synthetic metalation of phen-POP with IrCl3 afforded a single-site, highly active and selective catalyst for the hydrogenation of CO2 to formate.

scholarly journals Investigating Effects of Landfill Soil Gases on Landfill Elevated Subsurface Temperature

2020 ◽  
Vol 10 (18) ◽  
pp. 6401
Author(s):  
Samain Sabrin ◽  
Rouzbeh Nazari ◽  
Md Golam Rabbani Fahad ◽  
Maryam Karimi ◽  
Jess W. Everett ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Methodological Approach ◽  
The United States ◽  
Subsurface Temperature ◽  
Significance Level ◽  
Fire Hazards ◽  
Exothermic Reactions ◽  
The Us ◽  
Temperature Ranges ◽  
Soil Gases

Subsurface temperature is a critical indicator for the identification of the risk associated with subsurface fire hazards in landfills. Most operational landfills in the United States (US) have experienced exothermic reactions in their subsurface. The subsurface landfill area is composed of various gases generated from chemical reactions inside the landfills. Federal laws in the US mandate the monitoring of gases in landfills to prevent hazardous events such as landfill fire breakouts. There are insufficient investigations conducted to identify the causes of landfill fire hazards. The objective of this research is to develop a methodological approach to this issue. In this study, the relationship was investigated between the subsurface elevated temperature (SET) and soil gases (i.e., methane, carbon dioxide, carbon monoxide, nitrogen, and oxygen) with the greatest influence in landfills. The significance level of the effect of soil gases on the SET was assessed using a decision tree approach. A naïve Bayes technique for conditional probability was implemented to investigate how different gas combinations can affect different temperature ranges with respect to the safe and unsafe states of these gases. The results indicate that methane and carbon dioxide gases are strongly associated with SETs. Among sixteen possible gas combinations, three were identified as the most probable predictors of SETs. A three-step risk assessment framework is proposed to identify the risk of landfill fire incidents. The key findings of this research could be beneficial to landfill authorities and better ensure the safety of the community health and environment.

scholarly journals SAFT-γ Force Field for the Simulation of Molecular Fluids. 1. A Single-Site Coarse Grained Model of Carbon Dioxide

2011 ◽  
Vol 115 (38) ◽  
pp. 11154-11169 ◽  
Author(s):  
Carlos Avendaño ◽  
Thomas Lafitte ◽  
Amparo Galindo ◽  
Claire S. Adjiman ◽  
George Jackson ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Force Field ◽  
Single Site ◽  
Coarse Grained ◽  
Molecular Fluids ◽  
Coarse Grained Model
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