scholarly journals Correction to: Analysis of direct capture of CO2 from ambient air via steam-assisted temperature–vacuum swing adsorption

Adsorption ◽  
2021 ◽  
Author(s):  
Valentina Stampi-Bombelli ◽  
Mijndert van der Spek ◽  
Marco Mazzotti
Keyword(s):  
Ambient Air ◽  
Direct Capture ◽  
Vacuum Swing Adsorption

Sorbents for the Direct Capture of CO 2 from Ambient Air

2020 ◽  
Vol 59 (18) ◽  
pp. 6984-7006 ◽  
Author(s):  
Xiaoyang Shi ◽  
Hang Xiao ◽  
Habib Azarabadi ◽  
Juzheng Song ◽  
Xiaolong Wu ◽  
...  
Keyword(s):  
Ambient Air ◽  
Direct Capture

scholarly journals Direct Capture of CO2 from Ambient Air

2016 ◽  
Vol 116 (19) ◽  
pp. 11840-11876 ◽  
Author(s):  
Eloy S. Sanz-Pérez ◽  
Christopher R. Murdock ◽  
Stephanie A. Didas ◽  
Christopher W. Jones
Keyword(s):  
Ambient Air ◽  
Direct Capture

scholarly journals Analysis of direct capture of $${\hbox {CO}}_{2}$$ from ambient air via steam-assisted temperature–vacuum swing adsorption

Adsorption ◽  
2020 ◽  
Vol 26 (7) ◽  
pp. 1183-1197 ◽  
Author(s):  
Valentina Stampi-Bombelli ◽  
Mijndert van der Spek ◽  
Marco Mazzotti
Keyword(s):  
Parametric Study ◽  
Co Adsorption ◽  
Electrical Energy ◽  
Ambient Air ◽  
Operating Conditions ◽  
Desorption Kinetics ◽  
Desorption Time ◽  
Vacuum Swing Adsorption ◽  
Air Capture ◽  
Energy Consumptions

Abstract In this work, direct air capture (DAC) via adsorption is studied through the design and analysis of two temperature–vacuum swing adsorption (TVSA) cycles. In the first part, a novel way of describing the adsorption of $${\hbox {CO}}_{2}$$ CO 2 in presence of water vapor is proposed for co-adsorption kinetic and thermodynamic data gathered from the literature. Secondly, two TVSA cycle designs are proposed: one with a desorption step via external heating, and one with a steam purge. A schematic method for the determination of the cycle step times is proposed and a parametric study on the operating conditions is performed via cycle simulations using a detailed, first principles model. Finally, the two cycles are compared in terms of $${\hbox {CO}}_{2}$$ CO 2 production and energy consumption. The parametric study on the desorption time shows that there is a desorption time yielding the highest $${\hbox {CO}}_{2}$$ CO 2 production at low energy consumptions. Low evacuation pressures are necessary to reach high $${\hbox {CO}}_{2}$$ CO 2 production, but higher evacuation pressures show to be always favorable in terms of specific electrical energy requirements. A steam purge requires an additional thermal energy cost, but it not only allows decreasing the specific electrical energy consumptions, it also enhances $${\hbox {CO}}_{2}$$ CO 2 desorption kinetics and allows reaching higher $${\hbox {CO}}_{2}$$ CO 2 productions at milder evacuation pressures. The results of this work present the possibility to directly relate the availability of power and heat to the design of the cycle.

Parametric Study of the Three-Bed Pressure−Vacuum Swing Adsorption Process for High Purity O2Generation from Ambient Air

2007 ◽  
Vol 46 (11) ◽  
pp. 3720-3728 ◽  
Author(s):  
Sang-Jin Lee ◽  
Jin-Hwan Jung ◽  
Jong-Ho Moon ◽  
Jeong-Geun Jee ◽  
Chang-Ha Lee
Keyword(s):  
High Purity ◽  
Parametric Study ◽  
Adsorption Process ◽  
Ambient Air ◽  
Vacuum Swing Adsorption

ChemInform Abstract: Direct Capture of CO2from Ambient Air

ChemInform ◽  
2016 ◽  
Vol 47 (50) ◽  
Author(s):  
Eloy S. Sanz-Perez ◽  
Christopher R. Murdock ◽  
Stephanie A. Didas ◽  
Christopher W. Jones
Keyword(s):  
Ambient Air ◽  
Direct Capture

Development of a Rapid Survey Method of Sampling and Analysis for Asbestos in Ambient Air

1972 ◽  
Vol 30 ◽  
pp. 630-631 ◽  
Author(s):  
R. E. Heffelfinger ◽  
C. W. Melton ◽  
D. L. Kiefer ◽  
W. M. Henry ◽  
R. J. Thompson
Keyword(s):  
Neutron Activation ◽  
Ambient Air ◽  
Survey Method ◽  
Potential Hazard ◽  
Transmission Microscopy ◽  
Comparative Analyses ◽  
Asbestos Fibers ◽  
Controlled Conditions ◽  
Unequivocal Identification ◽  
Identification And Quantification

A methodology has been developed and demonstrated which is capable of determining total amounts of asbestos fibers and fibrils in air ranging from as low as fractional nanograms per cubic meter (ng/m3) of air to several micrograms/m3. The method involves the collection of samples on an absolute filter and provides an unequivocal identification and quantification of the total asbestos contents including fibrils in the collected samples.The developed method depends on the trituration under controlled conditions to reduce the fibers to fibrils, separation of the asbestos fibrils from other collected air particulates (beneficiation), and the use of transmission microscopy for identification and quantification. Its validity has been tested by comparative analyses by neutron activation techniques. It can supply the data needed to set emissions criteria and to serve as a basis for assessing the potential hazard for asbestos pollution to the populace.

Application of Electron Optics to Characterization of Particulate Pollutants

1972 ◽  
Vol 30 ◽  
pp. 364-365
Author(s):  
J. B. Moran ◽  
J. L. Miller
Keyword(s):  
Air Quality ◽  
Quality Standards ◽  
Ambient Air ◽  
Hazardous Substances ◽  
Fuel Additives ◽  
Ambient Air Quality ◽  
Air Quality Standards ◽  
Emission Standards ◽  
Stationary Sources ◽  
Ambient Air Quality Standards

The Clean Air Act Amendments of 1970 provide the basis for a dramatic change in Federal air quality programs. The Act establishes new standards for motor vehicles and requires EPA to establish national ambient air quality standards, standards of performance for new stationary sources of pollution, and standards for stationary sources emitting hazardous substances. Further, it establishes procedures which allow states to set emission standards for existing sources in order to achieve national ambient air quality standards. The Act also permits the Administrator of EPA to register fuels and fuel additives and to regulate the use of motor vehicle fuels or fuel additives which pose a hazard to public health or welfare.National air quality standards for particulate matter have been established. Asbestos, mercury, and beryllium have been designated as hazardous air pollutants for which Federal emission standards have been proposed.

Electron Microscopic Characterization and Quantitation of Air Borne Particulate Matter with Special Emphasis on Asbestos

1972 ◽  
Vol 30 ◽  
pp. 356-357
Author(s):  
Peter K. Mueller ◽  
Glenn R. Smith ◽  
Leslie M Carpenter ◽  
Ronald L. Stanley
Keyword(s):  
Electron Microscopy ◽  
Light And Electron Microscopy ◽  
Ambient Air ◽  
Quality Standard ◽  
Primary Objective ◽  
Cellulose Ester ◽  
Main Concept ◽  
Electron Microscopic ◽  
Air Samples ◽  
Diffraction Patterns

At the present time the primary objective of the electron microscopy group of the Air and Industrial Hygiene Laboratory is the development of a method suitable for use in establishing an air quality standard for asbestos in ambient air and for use in its surveillance. The main concept and thrust of our approach for the development of this method is to obtain a true picture of fiber occurrence as a function of particle size and asbestos type utilizing light and electron microscopy.We have now available an electron micrographic atlas of all asbestos types including selected area diffraction patterns and examples of fibers isolated from air samples. Several alternative approaches for measuring asbestos in ambient air have been developed and/or evaluated. Our experiences in this regard will be described. The most promising method involves: 1) taking air samples on cellulose ester membrane filters with a nominal pore size of 0.8 micron; 2) ashing in a low temperature oxygen plasma for several hours;

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