Results 11 to 20 of about 1,582,646 (264)

Case study on amplitude and phase response comparison between DAS and 3C geophone VSP surveys at a test site in Japan

Frontiers in Earth Science, 2022
Distributed acoustic sensing (DAS) is an effective tool for seismic surveys and is widely used as the preferred sensor for acquiring dense Vertical Seismic Profile (VSP).
Takahiro Nakajima, Takahiro Nakajima, Takayuki Miyoshi, Takayuki Miyoshi, Tsutomu Hashimoto, Tsutomu Hashimoto, Ziqiu Xue, Ziqiu Xue   +7 more
doaj   +1 more source

Ideal Adsorbed Solution Theory (IAST) of Carbon Dioxide and Methane Adsorption Using Magnesium Gallate Metal-Organic Framework (Mg-gallate)

Molecules, 2023
Ideal Adsorbed Solution Theory (IAST) is a predictive model that does not require any mixture data. In gas purification and separation processes, IAST is used to predict multicomponent adsorption equilibrium and selectivity based solely on experimental ...
Marhaina Ismail, Mohamad Azmi Bustam, Nor Ernie Fatriyah Kari, Yin Fong Yeong   +3 more
doaj   +1 more source

Scalable carbon dioxide electroreduction coupled to carbonylation chemistry

Nature Communications, 2017
Electroreduction of CO2 to CO is a potential valorisation pathway of carbon dioxide for fine chemicals production. Here, the authors show a user-friendly device that couples CO2 electroreduction with carbonylation chemistry for up to gram scale synthesis
Mikkel T. Jensen, Magnus H. Rønne, Anne K. Ravn, René W. Juhl, Dennis U. Nielsen, Xin-Ming Hu, Steen U. Pedersen, Kim Daasbjerg, Troels Skrydstrup   +8 more
doaj   +1 more source

Cooperative redox activation for carbon dioxide conversion

Nature Communications, 2016
While CO2 can be converted to CO for further reactivity, typically this involves the generation of large amounts of waste. Here the authors report the conversion of CO2to CO, with the siloxane by-product being further used in a carbonylative Hiyama ...
Zhong Lian, Dennis U. Nielsen, Anders T. Lindhardt, Kim Daasbjerg, Troels Skrydstrup   +4 more
doaj   +1 more source

Oxidation of cellulose in pressurized carbon dioxide [PDF]

, 2009
This work presents first results upon oxidation of type II cellulose by nitrogen dioxide dissolved in carbon dioxide at high pressure. This reaction leads to oxidized cellulose, a natural-based bioresorbable fabric used for biomedical applications.
Montanari, Suzelei, Vignon, Michel, Camy, Séverine, Rattaz, Aurélie, Condoret, Jean-Stéphane   +4 more
core   +1 more source

Kinetics of absorption of carbon dioxide in aqueous piperazine solutions [PDF]

, 2006
In the present work the absorption of carbon dioxide into aqueous piperazine (PZ) solutions has been studied in a stirred cell, at low to moderate temperatures, piperazine concentrations ranging from 0.6 to 1.5 kmol m- 3, and carbon dioxide pressures up ...
Versteeg, G. F.,, Versteeg, G.F., van Aken, C., Kleingeld, T., Hogendoorn, J.A., Kleingeld, T.,, Hogendoorn, J. A., Versteeg, G. F., van Aken, C.,, Derks, P. W. J., Derks, P. W. J.,, Derks, P.W.J., Hogendoorn, J. A.,   +12 more
core   +1 more source

Catalyst Deactivation Simulation Through Carbon Deposition in Carbon Dioxide Reforming over Ni/CaO-Al2O3 Catalyst [PDF]

, 2011
Major problem in CO2 reforming of methane (CORM) process is coke formation which is a carbonaceous residue that can physically cover active sites of a catalyst surface and leads to catalyst deactivation.
Amin, N.A.S., Istadi, I., Anggoro, D. D., Didi D. Anggoro, Anggoro, Didi D., Dorothy Hoo Wei Ling, Istadi Istadi, Ling, D.H.W, Hoo, Dorothy Wei Ling, Nor Aishah Saidina Amin, Saidina Amin, Nor Aishah   +10 more
core   +1 more source

Green synthesis approach using deep eutectic solvents to enhance the surface functional groups on porous carbon for CO2 capture [PDF]

E3S Web of Conferences
This study explores the potential of green solvents using amino acids-based deep eutectic solvents to alter surface functionality of activated carbon thus enhancing the carbon dioxide (CO2) adsorption capacity.
Hussin Farihahusnah, Ho Zhongyi, Hazani Nur Nadira, Kassim Mohd Azlan, Aroua Mohamed Kheireddine   +4 more
doaj   +1 more source

Carbon Dioxide Angiography [PDF]

Seminars in Interventional Radiology, 2008
The algorithm for patients with renal insufficiency who require vascular imaging has recently changed in my hospital. Previously, the majority of these patients underwent magnetic resonance angiography (MRA) or occasionally computed tomographic angiography after prescan hydration and sodium bicarbonate infusion.
openaire   +2 more sources

Fiber Optic Sensing for Geomechanical Monitoring: (2)- Distributed Strain Measurements at a Pumping Test and Geomechanical Modeling of Deformation of Reservoir Rocks

Applied Sciences, 2019
In this study distributed fiber optic sensing has been used to measure strain along a vertical well of a depth of 300 m during a pumping test. The observed strain data has been used in geomechanical simulation, in which a combined analytical and ...
Xinglin Lei, Ziqiu Xue, Tsutomu Hashimoto   +2 more
doaj   +1 more source