Membranes 2012, 2(4), 706-726; doi:10.3390/membranes2040706
Review

Membranes for Environmentally Friendly Energy Processes

Department of Chemical Engineering, Norwegian University of Science and Technology, Trondheim NO-7491, Norway
* Author to whom correspondence should be addressed.
Received: 2 August 2012; in revised form: 19 September 2012 / Accepted: 27 September 2012 / Published: 18 October 2012
(This article belongs to the Special Issue Membrane Processes and Energy)
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Abstract: Membrane separation systems require no or very little chemicals compared to standard unit operations. They are also easy to scale up, energy efficient, and already widely used in various gas and liquid separation processes. Different types of membranes such as common polymers, microporous organic polymers, fixed-site-carrier membranes, mixed matrix membranes, carbon membranes as well as inorganic membranes have been investigated for CO2 capture/removal and other energy processes in the last two decades. The aim of this work is to review the membrane systems applied in different energy processes, such as post-combustion, pre-combustion, oxyfuel combustion, natural gas sweetening, biogas upgrading, hydrogen production, volatile organic compounds (VOC) recovery and pressure retarded osmosis for power generation. Although different membranes could probably be used in a specific separation process, choosing a suitable membrane material will mainly depend on the membrane permeance and selectivity, process conditions (e.g., operating pressure, temperature) and the impurities in a gas stream (such as SO2, NOx, H2S, etc.). Moreover, process design and the challenges relevant to a membrane system are also being discussed to illustrate the membrane process feasibility for a specific application based on process simulation and economic cost estimation.
Keywords: membrane; CO2 capture; flues gas; natural gas sweetening; biogas upgrading; hydrogen production; VOC recovery; pressure retarded osmosis

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MDPI and ACS Style

He, X.; Hägg, M.-B. Membranes for Environmentally Friendly Energy Processes. Membranes 2012, 2, 706-726.

AMA Style

He X, Hägg M-B. Membranes for Environmentally Friendly Energy Processes. Membranes. 2012; 2(4):706-726.

Chicago/Turabian Style

He, Xuezhong; Hägg, May-Britt. 2012. "Membranes for Environmentally Friendly Energy Processes." Membranes 2, no. 4: 706-726.

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