Adsorption Behavior of Carbon Dioxide and Methane on AlPO4-14: A Neutral Molecular Sieve

2009 ◽  
Vol 23 (3) ◽  
pp. 1534-1538 ◽  
Author(s):  
Xing-Xiang Zhao ◽  
Xiao-Liang Xu ◽  
Lin-Bing Sun ◽  
Li−Li Zhang ◽  
Xiao-Qin Liu
Keyword(s):  
Carbon Dioxide ◽  
Molecular Sieve ◽  
Adsorption Behavior

Adsorption Behavior of Toluene on Activated Carbon under Supercritical Carbon Dioxide Conditions

2012 ◽  
Vol 45 (12) ◽  
pp. 931-938 ◽  
Author(s):  
Ikuo Ushiki ◽  
Takashi Asaka ◽  
Yusuke Yoshizawa ◽  
Kazunori Kashiwagi ◽  
Masaki Ota ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Activated Carbon ◽  
Supercritical Carbon Dioxide ◽  
Adsorption Behavior ◽  
Supercritical Carbon

Gas-Solid Chromatographic Determination of Oxygen, Nitrogen, Carbon Dioxide, Ethylene, and Nitrous Oxide at Ambient Temperature

1973 ◽  
Vol 56 (1) ◽  
pp. 119-123
Author(s):  
Martin J Finkelson
Keyword(s):  
Carbon Dioxide ◽  
Nitrous Oxide ◽  
Ambient Temperature ◽  
Molecular Sieve ◽  
Internal Standard ◽  
Chromatographic Determination ◽  
Digital Integrator ◽  
In Series ◽  
Peak Areas

Abstract A gas-solid chromatographic method is described for the separation and determination of 5 medicinal gases at ambient temperature, using 2 gas chromatographic columns, Porapak Q and Molecular Sieve 13X, operated in series with a 6-port thermal conductivity detector and I recorder. An electronic digital integrator is used for calculating peak areas. Data on retention time, linearity, reproducibility of injection, and comparison with absorption methods are presented. Analytical results for oxygen, nitrogen, carbon dioxide, ethylene, and nitrous oxide are attainable within 1.0% without the use of an internal standard.

scholarly journals Advances in the Radiocarbon Analysis of Carbon dioxide at the NERC Radiocarbon Facility (East Kilbride) using Molecular sieve Cartridges

Radiocarbon ◽  
2019 ◽  
Vol 61 (6) ◽  
pp. 1855-1865
Author(s):  
M H Garnett ◽  
Josephine-Anne Newton ◽  
P L Ascough
Keyword(s):  
Carbon Dioxide ◽  
Molecular Sieves ◽  
Molecular Sieve ◽  
Content Standards ◽  
Sieve Methods ◽  
Scientific Investigations ◽  
Consensus Values ◽  
Anthropogenic Processes ◽  
Automated Procedures ◽  
Quality Assurance Standards

ABSTRACTRadiocarbon (14C) analysis of carbon dioxide (CO2) provides unique information on the age, turnover and source of this important greenhouse gas, raising the prospect of novel scientific investigations into a range of natural and anthropogenic processes. To achieve these measurements, cartridges containing zeolite molecular sieves are a reliable and convenient method for collecting CO2 samples. At the NERC Radiocarbon Facility (East Kilbride) we have been refining our molecular sieve methods for over twenty years to achieve high-quality, reproducible and precise measurements. At the same time, we have been developing novel field sampling methods to expand the possibilities in collecting gas from the atmosphere, soil respiration and aquatic environments. Here, we present our latest improvements to cartridge design and procedures. We provide the results of tests used to verify the methods using known 14C content standards, demonstrating reliability for sample volumes of 3 mL CO2 (STP; 1.6 mg C) collected in cartridges that had been prepared at least three months earlier. We also report the results of quality assurance standards processed over the last two years, with results for 22 out of 23 international 14C standards being within measurement uncertainty of consensus values. We describe our latest automated procedures for the preparation of cartridges prior to use.

Kinetic separation of methane/carbon dioxide by molecular sieve carbons

2002 ◽  
Vol 37 (11) ◽  
pp. 2505-2528 ◽  
Author(s):  
Ambalavanan Jayaraman ◽  
Andrew S. Chiao ◽  
Joel Padin ◽  
Ralph T. Yang ◽  
Curtis L. Munson
Keyword(s):  
Carbon Dioxide ◽  
Molecular Sieve ◽  
Methane Carbon ◽  
Kinetic Separation

Experimental Study on Adsorption of Carbon Dioxide on 13X Molecular Sieve for Coolant Helium Purification

2013 ◽  
Author(s):  
Hua Chang ◽  
Tao Ma ◽  
Ling Liu ◽  
Hua-Qiang Yin ◽  
Xue-Dong He
Keyword(s):  
Carbon Dioxide ◽  
Adsorption Capacity ◽  
Molecular Sieve ◽  
Fixed Bed ◽  
Breakthrough Curves ◽  
Carbon Dioxide Partial Pressure ◽  
Zone Model ◽  
Low Carbon ◽  
Enthalpy Of Adsorption ◽  
Operation Conditions

The adsorption capability of carbon dioxide on 13X molecular sieve (13XMS) was investigated in a fixed-bed apparatus with two-road gas mixing system by dynamic column breakthrough method with helium as carrier gas at helium purification conditions of high-temperature gas-cooled reactor (HTGR). Experiments were performed at temperatures of 5°C ∼35 °C and low carbon dioxide partial pressure range of 10∼150Pa. By analyzing the breakthrough curve, both equilibrium adsorption capacity and kinetic adsorption capacity at breakthrough point were determined. Based on mass-transfer zone model, the experimental breakthrough curves at different operation conditions were analyzed. The carbon dioxide isotherm on 13XMS was fitted well by Langmuir model and the enthalpy of adsorption of carbon dioxide was estimated.

A Gas-Chromatographic Micromethod for Respiration Studies on Insects

1971 ◽  
Vol 54 (2) ◽  
pp. 437-441
Author(s):  
U. TADMOR ◽  
S. W. APPLEBAUM ◽  
R. KAFIR
Keyword(s):  
Carbon Dioxide ◽  
Thermal Conductivity ◽  
Oxygen Consumption ◽  
Molecular Sieve ◽  
Chromatographic Method ◽  
Porapak Q ◽  
Chilocorus Bipustulatus ◽  
Initial Separation ◽  
Carbon Dioxide Release ◽  
Gas Chromatographic Method

1. A gas-chromatographic method adapted for measuring both oxygen consumption and carbon dioxide release of individual insects is described. 2. The method is based on initial separation of air from CO2 on Porapak Q, and infsequent separation of oxygen from nitrogen on molecular sieve 5A. 3. 1-2µl. of O2 or CO2 are easily measured with the thermal conductivity apparatus used. 4. Representative respiratory values of field-collected and laboratory-reared adult Chilocorus bipustulatus beetles are presented in order to show the capability of the method.

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