Cyclic Fixed-Bed Operations over K2CO3-on-Carbon for the Recovery of Carbon Dioxide under Moist Conditions

As one of the fundamental issues of the new poly-generation system on the basis of gasification gas and coke oven gas, carbon dioxide reforming of methane experiments have been performed over coal chars derived from different parent coals in a lab-scale fixed-bed reactor (internal diameter 12 mm, length 700 mm). The char derived from TongChuan coal exhibited higher activity than other samples employed under the same conditions. After the reforming reaction, the char samples were covered with different amounts of carbon deposition which resulted in the surface areas decrease. As the flow rate of feed gas increased from 200 ml/min to 600 ml/min over the Xuzhou char sample at 1050 degrees Celsius, the conversion of methane decreased from 52.7% to 17.5% and the H2 /CO dropped from 0.75 to 0.55. While maintaining the flow rate of CO2 at 20ml/min at 1050 degrees Celsius, the mole ratio of reactants CH4/CO2 was varied from 1 to 1.75 which led to the H2/CO ratio increase from 0.75 to 1.2.

Download Full-text

Adsorption of carbon dioxide by diethanolamine activated alumina beads in a fixed bed

Chemical Engineering Journal ◽

10.1016/j.cej.2014.05.018 ◽

2014 ◽

Vol 253 ◽

pp. 350-355 ◽

Cited By ~ 42

Author(s):

M. Auta ◽

B.H. Hameed

Keyword(s):

Carbon Dioxide ◽

Fixed Bed ◽

Activated Alumina

Download Full-text

Non-isothermal Adsorption of Nitrogen-carbon Dioxide Mixture in a Fixed Bed of Zeolite-X.

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN ◽

10.1252/jcej.27.45 ◽

1994 ◽

Vol 27 (1) ◽

pp. 45-51 ◽

Cited By ~ 23

Author(s):

Jong-Nam Kim ◽

Kuck-Tack Chue ◽

Kwon-Il Kim ◽

Soon-Haeng Cho ◽

Jong-Duk Kim

Keyword(s):

Carbon Dioxide ◽

Fixed Bed ◽

Zeolite X ◽

Isothermal Adsorption ◽

Adsorption Of Nitrogen

Download Full-text

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

Volume 2: Plant Systems, Construction, Structures and Components; Next Generation Reactors and Advanced Reactors ◽

10.1115/icone21-15362 ◽

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.

Download Full-text