Mixed-conducting oxygen permeable ceramic membranes for the carbon dioxide reforming of methane

Abstract

Due to the high economic, environmental, and safety costs associated with pure oxygen, mixedconducting oxygen-permeable ceramic membranes are being explored as an alternative oxygen source for hydrocarbon conversion reactors. This work reports a dramatic improvement in catalyst performance when an oxygen-permeable SrFeCo 0.5 O x ceramic membrane is used in conjunction with a conventional powder Pt/ZrO 2 catalyst for the CO 2 reforming of CH 4 . Experiments comparing catalyst performance with up to 2% co-fed oxygen to catalyst performance with oxygen from the ceramic membrane demonstrated a conversion three times higher with the membrane than with any amount of co-fed oxygen. The results suggest that membrane oxygen is more beneficial for catalyst activity and stability than molecular gas-phase oxygen.

The Interaction Between SrFeCo0.5O x Ceramic Membranes and Pt/CeZrO2 During Syngas Production from Methane

“…Previous studies of the oxygen assisted carbon dioxide reforming of methane at 800°C have shown that when a disk-shaped SFC ceramic membrane is used in conjunction with an unreduced Pt/ZrO 2 catalyst, the oxygen from the ceramic membrane is more beneficial to the methane conversion than the co-fed oxygen [2]. This increased activity has been ascribed to two factors.…”

“…H 2 ) from methane using non-porous oxygen-conducting ceramic membranes as an alternative to the conventional expensive process based on an air separation plant [1,2]. The interest in such selective ceramic membranes is due to their intrinsic ability to act as oxygen suppliers or oxygen distributors at high temperatures in the oxidation process of methane [1,3,4] or other hydrocarbons [5,6].…”

Temperature-programmed Studies of Coke Resistant Ni Catalyst for Carbon Dioxide Reforming of Methane

“…It provides a practical and effective way for the utilization of the two major greenhouse gases (CO 2 and methane) [2]. Many catalysts, including Ni-based catalysts and supported noble metal catalysts, show excellent activity for the CO 2 reforming of methane [7][8][9][10][11].…”

“…Carbon dioxide (CO 2 ) reforming of methane to synthesis gas attracts ever-growing interest from both environmental and industry aspects [1][2][3][4][5][6]. It provides a practical and effective way for the utilization of the two major greenhouse gases (CO 2 and methane) [2].…”

CO2 as an Oxidant for High-Temperature Reactions

“…Nevertheless, recent research developments show much focus on the design of chemically tolerant membranes. This is proven based on several successful studies on the implementation of integrated catalytic membrane reactor systems for reactions such as CO 2 -mediated reforming of methane (Slade et al, 2007;Yang et al, 2013;Kathiraser et al, 2013b). Substantial work, however, is required to enhance the robustness as well as inherent permeability characteristics of the membrane under the harsh chemical reaction environment.…”