Journal Article

FZJ-2018-03785

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Chemical stability in H 2 S and creep characterization of the mixed protonic conductor Nd 5.5 WO 11.25-δ

Escolástico, S. ; Stournari, V. ; Malzbender, J.FZJ* ; Haas-Santo, K. ; Dittmeyer, R. ; Serra, J. M. (Corresponding author)

2018
Elsevier New York, NY [u.a.]

This record in other databases:    

Please use a persistent id in citations: doi:10.1016/j.ijhydene.2018.03.060

Abstract: The integration of hydrogen permeable membranes in catalytic membrane reactors for thermodynamically limited reactions such as steam methane reforming can improve the per-pass yield and simultaneously produce a high-purity H2 stream. Mixed protonic-electronic materials based membranes are potential candidates for these applications due to their elevated temperature operation, good stability and potentially low cost. However, a specific mechanical behavior and stability under harsh atmospheres is needed to guarantee sufficient lifetime in real-world processes. This work presents the mechanical characterization and a study of the chemical stability under H2S containing atmospheres for the compound Nd5.5WO11.25-δ. Mechanical characterization was performed by micro-indentation and creep measurements in air. Chemical stability was evaluated by XRD and SEM and the effect of the H2S on the transport properties was evaluated by impedance spectroscopy. Under H2S atmospheres, the total conductivity increases at 600 °C and 700 °C. The conductivity increase is attributed to the incorporation of S2− ions in oxide-ion sublattice.

---

Contributing Institute(s):

1. Werkstoffstruktur und -eigenschaften (IEK-2)

Research Program(s):

1. 111 - Efficient and Flexible Power Plants (POF3-111) (POF3-111)

Appears in the scientific report 2018

---

Database coverage:
; Current Contents - Engineering, Computing and Technology ; Ebsco Academic Search ; IF < 5 ; JCR ; NCBI Molecular Biology Database ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

---