Thermochemical evaluation of oxygen transport membranes under oxy‐combustion conditions in a pilot‐scale facility

Abstract

BACKGROUND Control of greenhouse gas emissions has become one of the most important challenges faced by humanity. Among the various approaches to mitigating CO2 emissions, carbon capture and storage (CCS) is considered one of the most promising clean coal options for the future because it can be implemented in the short and medium terms at the industrial scale. Among CCS techniques, oxy‐combustion offers advantages in using pure oxygen (O2) as a comburent, where in a flue gas composed mainly of CO2 and water vapor is generated. Cryogenic air separation is the only available technology that can provide the required amount of O2, but this process requires large amounts of energy and is costly, which make its large‐scales implementation difficult. RESULTS In this framework, oxygen transport membranes are being researched as an O2 supplier unit because they offer advantages from a techno‐economic view point. In the present work, the thermochemical stabilities of La0.6Sr0.4Co0.2Fe0.8O3 and Cobalt‐doped Ce0.9Gd0.1O were evaluated to obtain information on their behavior in oxy‐combustion atmospheres. Experiments were performed in a circulating fluidized bed boiler of a pilot plant using an experimental sampling train. Samples of the two materials were characterized by X‐ray diffraction, X‐ray fluorescence, infrared spectroscopy, Raman spectroscopy, scanning electron microscopy with energy‐dispersive X‐ray spectroscopy, and Brunauer–Emmett–Teller analysis. CONCLUSIONS The results revealed that both materials were susceptible to the presence of species that originated from flue gas, materials comprising the boiler and ducts, and coal ash, and that the CGO_Co material showed better performance than the other studied material. © 2020 Society of Chemical Industry

IoT-Based Sensor Systems for Intelligence in Transportation, Healthcare and Natural Gas Detection

“…In the last decade, significant advances have been made to enhance the deployment of sensors (1). Everything from novel manufacturing technologies (including additive manufacturing techniques) (2,3) to novel topologies (4) to novel material systems (5).…”

In Focus: ANQUE‐ICCE‐CIBIQ 2019

“…Overall, this In Focus presents an exciting collection of works covering relevant topics connected to the fields of process technology and environmental and sustainable technology. Particularly, several papers focus on technological advances and challenges for cleaner energy production, which involves several capture technologies at different levels of maturity . First, process intensification in post‐combustion carbon capture is considered by combining the use of ionic liquids and membrane technology .…”

“…First, process intensification in post‐combustion carbon capture is considered by combining the use of ionic liquids and membrane technology . In addition, the evaluation of the CO 2 absorption capacity of sterically hindered amines under partial oxy‐combustion conditions and the thermochemical assessment of the susceptibility of oxygen transport membranes under oxy‐combustion conditions in a pilot‐scale facility are addressed. Moreover, utilization of CO 2 captured from combustion processes is a promising option that is attracting increasing attention.…”

“…Particularly, several papers focus on technological advances and challenges for cleaner energy production, which involves several capture technologies at different levels of maturity. [1][2][3] First, process intensification in post-combustion carbon capture is considered by combining the use of ionic liquids and membrane technology. 1 In addition, the evaluation of the CO 2 absorption capacity of sterically hindered amines under partial oxycombustion conditions 2 and the thermochemical assessment of the susceptibility of oxygen transport membranes under oxycombustion conditions in a pilot-scale facility 3 are addressed.…”