Premium
Development of a Steel‐Slag‐Based, Iron‐Functionalized Sorbent for an Autothermal Carbon Dioxide Capture Process
Author(s) -
Tian Sicong,
Jiang Jianguo,
Hosseini Davood,
Kierzkowska Agnieszka M.,
Imtiaz Qasim,
Broda Marcin,
Müller Christoph R.
Publication year - 2015
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201501048
Subject(s) - sorbent , carbon dioxide , slag (welding) , materials science , process (computing) , chemical engineering , steelmaking , chemistry , metallurgy , adsorption , organic chemistry , computer science , engineering , operating system
We propose a new class of autothermal CO 2 ‐capture process that relies on the integration of chemical looping combustion (CLC) into calcium looping (CaL). In the new process, the heat released during the oxidation of a reduced metallic oxide is utilized to drive the endothermic calcination of CaCO 3 (the regeneration step in CaL). Such a process is potentially very attractive (both economically and technically) as it can be applied to a variety of oxygen carriers and CaO is not in direct contact with coal (and the impurities associated with it) in the calciner (regeneration step). To demonstrate the practical feasibility of the process, we developed a low‐cost, steel‐slag‐based, Fe‐functionalized CO 2 sorbent. Using this material, we confirm experimentally the feasibility to heat‐integrate CaCO 3 calcination with a Fe II /Fe III redox cycle (with regards to the heat of reaction and kinetics). The autothermal calcination of CaCO 3 could be achieved for a material that contained a Ca/Fe ratio of 5:4. The uniform distribution of Ca and Fe in a solid matrix provides excellent heat transfer characteristics. The cyclic CO 2 uptake and redox stability of the material is good, but there is room for further improvement.