The copper–carbon dioxide system, a new mild and selective catalyst for the methoxylation of non-activated aromatic bromides

1993 ◽  
pp. 419-420 ◽  
Author(s):  
D. Nobel
Keyword(s):  
Carbon Dioxide ◽  
Selective Catalyst ◽  
System A

scholarly journals STUDIES IN RESPIROMETRY

1932 ◽  
Vol 16 (1) ◽  
pp. 5-22 ◽  
Author(s):  
William R. Thompson
Keyword(s):  
Carbon Dioxide ◽  
Closed System ◽  
System A ◽  
Moist Environment ◽  
Considerable Detail ◽  
Oxygen Concentrations

A machine has been described which combines volumetric and refractometric means of observing changes in carbon dioxide and oxygen concentrations and amounts in a closed system suitable for containing a respiring system. A means of thermoregulation has been described briefly. The theory upon which estimation is based has been outlined in considerable detail and generality; indicating how dependence upon absorption of gases by reagents can be eliminated completely, although they may be used in certain instances as a means of independent check. An experiment of this nature has been reported as an illustration of one use of the machine. Data of other experiments in which a moist environment was employed for the respiring system will be given in another communication.

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.

Bicarbonate-carbon dioxide buffer system: a determinant of the mitochondrial pH gradient

1984 ◽  
Vol 247 (3) ◽  
pp. F440-F446 ◽  
Author(s):  
D. P. Simpson ◽  
S. R. Hager
Keyword(s):  
Carbon Dioxide ◽  
Renal Cortex ◽  
Ph Gradient ◽  
Buffer System ◽  
Acid Base ◽  
Bicarbonate Buffer ◽  
Inner Membrane ◽  
System A ◽  
Intact Kidney ◽  
The Difference

The influence of the bicarbonate-carbon dioxide buffer system on the pH gradient (delta pH) across the inner membrane of mitochondria from rabbit renal cortex was studied with and without phosphate in the medium. delta pH with bicarbonate buffer or phosphate in the medium was greater at low than at high medium pH so that the difference (delta delta pH) between delta pH at pH 7.1 and at 7.6 was positive. Varying the concentration of phosphate from 0 to 10 mM had little effect on delta delta pH produced by bicarbonate buffer. Inhibition of the phosphate-hydroxyl carrier with N-ethylmaleimide abolished delta delta pH when phosphate was present in non-bicarbonate-containing media. With bicarbonate buffer present, N-ethylmaleimide increased delta delta pH. Similar effects were observed in mitochondria from liver and heart as well as from kidney. The effects of the bicarbonate buffer system on delta pH may result either from an inner membrane permeable to carbon dioxide but not to bicarbonate ion or from an active carrier for bicarbonate ion in the inner membrane. In intact kidney cells, the influence of the bicarbonate buffer system on delta pH may provide a mechanism for regulating substrate metabolism in response to acid-base changes. It may also serve in many organs to reduce fluctuations in matrix pH when alterations in cytoplasmic pH occur.

State Estimation Based on Nonlinear Observer for Hydrogen Production in a Photocatalytic Anaerobic Bioreactor

2017 ◽  
Vol 15 (5) ◽  
Author(s):  
Ricardo Aguilar López ◽  
Beatriz Ruiz Camacho ◽  
M. Isabel Neria-González ◽  
Eduardo Rangel ◽  
Omar Santos ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Hydrogen Production ◽  
Lyapunov Stability Theory ◽  
Nonlinear Observer ◽  
Sulfate Concentration ◽  
Continuous Processes ◽  
Sulfate Reducing ◽  
Continuous Bioreactor ◽  
System A ◽  
Modeling Errors

Abstract Hydrogen concentration in a photocatalytic continuous bioreactor was estimated. For the above system, a novel kinetic model of the sulfate-reducing process for hydrogen production was proposed and experimentally confirmed. In addition, we present the design of an estimator based on nonlinear observer, which is robust against modeling errors, to estimate the observable states of the bioreactor. Sulfate, biomass, sulfide, carbon dioxide, cadmium in liquid, cadmium sulfide, and hydrogen concentrations were estimated in spite of errors in the evaluation of the parameters using sulfate concentration as measurable output. The convergence of the proposed observer was analyzed using Lyapunov stability theory. Finally, maximum hydrogen production was 225 mL and 175 mL for batch and continuous processes, respectively.

scholarly journals Lumped parameter modelling of two-phase ejectors: numerical implications of the equilibrium assumptions

2021 ◽  
Vol 2116 (1) ◽  
pp. 012089
Author(s):  
Giorgio Besagni
Keyword(s):  
Carbon Dioxide ◽  
Critical Temperature ◽  
Operating Conditions ◽  
Cutting Edge ◽  
Technical Solution ◽  
Two Phase ◽  
Operation Conditions ◽  
System A ◽  
Lumped Parameter ◽  
Major Shortcoming

Abstract The use of carbon dioxide as refrigerant is attracting a growing attention and is a cutting-edge research topic. In spite of its many advantages, carbon dioxide has a major shortcoming, viz., low critical temperature. Owing to the low critical temperature, carbon dioxide cycles encompass both the sub-critical and the trans-critical operation conditions; the trans-critical operating conditions are characterized by high thermodynamic losses, requiring particular attention in the integrated component/system design criteria. In this perspective, in recent years, ejector technology has been widely recognized as a promising technical solution to support the deployment of carbon dioxide cycles, by reducing throttling losses. Unfortunately, the large variation in system operations as well as the changes in sub-critical and trans-critical operating conditions makes the numerical simulation of carbon dioxide ejector-based system a cutting-edge challenge. This paper contributes to the present day discussion on the validation of lumped parameter models for carbon dioxide ejectors. A model taken from the literature has been tested against literature data and the equilibrium assumptions, underlying the modelling approach have been tested.

Developing the world’s largest CO2 Injection System – a history of the Gorgon Carbon Dioxide Injection System

2021 ◽  
Author(s):  
Mark Trupp ◽  
Scott Ryan ◽  
Ishtar Barranco Mendoza ◽  
Daniel Leon ◽  
Leigh Scoby-Smith
Keyword(s):  
Carbon Dioxide ◽  
Injection System ◽  
Co2 Injection ◽  
Carbon Dioxide Injection ◽  
System A ◽  
History Of

Supramolecular β-cyclodextrin–aniline system: a new class of amine on solid support for carbon dioxide capture with high amine efficiency

RSC Advances ◽  
2013 ◽  
Vol 3 (46) ◽  
pp. 24041 ◽  
Author(s):  
Deepthi L. Sivadas ◽  
K. P. Vijayalakshmi ◽  
R. Rajeev ◽  
K. Prabhakaran ◽  
K. N. Ninan
Keyword(s):  
Carbon Dioxide ◽  
Carbon Dioxide Capture ◽  
Solid Support ◽  
New Class ◽  
System A
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