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Title: Improved pressure swing adsorption processes for gas separation: By heat exchange between adsorbers and by high-heat-capacity inert additives

Abstract

Two new pressure swing adsorption processes for bulk gas separation are proposed. The first one is by allowing heat exchange between the adsorber columns, for example, by using a shell-and-tube type heat exchanger, where the shell and the tube are two beds. By model simulations, it is shown that the new process offers substantial improvements in both product purities and recoveries over the adiabatic process, which resembles the industrial operations using large beds. A fundamental understanding for the improvements is given through model simulations. A peculiar high-temperature plateau and cold ends in the bed are predicted for the adiabatic process. In the second process, an inert material with a high heat capacity is added into the adsorbent bed. The inert additive serves to store heat during adsorption and release it during desorption, hence reducing the magnitudes of the temperature excursions during pressure swing cycle and improving the separations. Model simulation results are presented for bulk separation of H/sub 2//CH/sub 4/ and H/sub 2//CO mixtures with various amounts of iron particles added in a bed of activated carbon. The results show substantial improvements in both product purities and recoveries by the inert additive. A fundamental understanding of the role played bymore » the inert additive is gained through a comparison of the temperature profiles in the bed and its variation with time during a steady-state cycle.« less

Authors:
;
Publication Date:
Research Org.:
Dept. of Chemical Eng., State Univ. of New York at Buffalo, Buffalo, NY 14260
OSTI Identifier:
5770081
Resource Type:
Journal Article
Journal Name:
Ind. Eng. Chem. Process Des. Dev.; (United States)
Additional Journal Information:
Journal Volume: 25:1
Country of Publication:
United States
Language:
English
Subject:
03 NATURAL GAS; ACTIVATED CARBON; SORPTIVE PROPERTIES; CARBON MONOXIDE; SEPARATION PROCESSES; HYDROGEN; METHANE; ADSORPTION; ADDITIVES; ADIABATIC PROCESSES; HEAT TRANSFER; HYDRIDES; IMPURITIES; IRON; MATHEMATICAL MODELS; MIXTURES; PRESSURE EFFECTS; SPECIFIC HEAT; STEADY-STATE CONDITIONS; TEMPERATURE GRADIENTS; ADSORBENTS; ALKANES; CARBON; CARBON COMPOUNDS; CARBON OXIDES; CHALCOGENIDES; DISPERSIONS; ELEMENTS; ENERGY TRANSFER; HYDROCARBONS; HYDROGEN COMPOUNDS; METALS; NONMETALS; ORGANIC COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; SORPTION; SURFACE PROPERTIES; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENTS; 030300* - Natural Gas- Drilling, Production, & Processing

Citation Formats

Yang, R T, and Cen, P L. Improved pressure swing adsorption processes for gas separation: By heat exchange between adsorbers and by high-heat-capacity inert additives. United States: N. p., 1986. Web. doi:10.1021/i200032a009.
Yang, R T, & Cen, P L. Improved pressure swing adsorption processes for gas separation: By heat exchange between adsorbers and by high-heat-capacity inert additives. United States. https://doi.org/10.1021/i200032a009
Yang, R T, and Cen, P L. Wed . "Improved pressure swing adsorption processes for gas separation: By heat exchange between adsorbers and by high-heat-capacity inert additives". United States. https://doi.org/10.1021/i200032a009.
@article{osti_5770081,
title = {Improved pressure swing adsorption processes for gas separation: By heat exchange between adsorbers and by high-heat-capacity inert additives},
author = {Yang, R T and Cen, P L},
abstractNote = {Two new pressure swing adsorption processes for bulk gas separation are proposed. The first one is by allowing heat exchange between the adsorber columns, for example, by using a shell-and-tube type heat exchanger, where the shell and the tube are two beds. By model simulations, it is shown that the new process offers substantial improvements in both product purities and recoveries over the adiabatic process, which resembles the industrial operations using large beds. A fundamental understanding for the improvements is given through model simulations. A peculiar high-temperature plateau and cold ends in the bed are predicted for the adiabatic process. In the second process, an inert material with a high heat capacity is added into the adsorbent bed. The inert additive serves to store heat during adsorption and release it during desorption, hence reducing the magnitudes of the temperature excursions during pressure swing cycle and improving the separations. Model simulation results are presented for bulk separation of H/sub 2//CH/sub 4/ and H/sub 2//CO mixtures with various amounts of iron particles added in a bed of activated carbon. The results show substantial improvements in both product purities and recoveries by the inert additive. A fundamental understanding of the role played by the inert additive is gained through a comparison of the temperature profiles in the bed and its variation with time during a steady-state cycle.},
doi = {10.1021/i200032a009},
url = {https://www.osti.gov/biblio/5770081}, journal = {Ind. Eng. Chem. Process Des. Dev.; (United States)},
number = ,
volume = 25:1,
place = {United States},
year = {1986},
month = {1}
}