TY - JOUR
T1 - Alkali removal with mineral sorbents – Part I
T2 - Sorption capacity and reaction kinetics
AU - Kerscher, Florian
AU - Spliethoff, Hartmut
N1 - Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/9
Y1 - 2021/9
N2 - Aluminosilicate sorbents show the potential to reduce alkali-related problems during solid fuel conversion such as deposit build-up and corrosion damages. The alkali capacity, the reaction kinetics and the surface area development of the sorbents under operating conditions are essential parameters for the mathematical description of the alkali sorption. In this work, three sorbents, kaolin, bauxite and bentonite, are characterized in this regard by thermogravimetric analysis. The sorption behavior of kaolin surpasses the other sorbents due to the highest loading capacity and the temperature-stability of the porous structure. However, the suitability as sorbent in solid fuel conversion processes is given for all materials. A mathematical sorption model is applied to the experimental data in order to derive kinetic parameters of the sodium and potassium sorption under syngas and flue gas atmosphere. Thus, this work provides the necessary dataset for the design and optimization of the sorbent use in industrial processes.
AB - Aluminosilicate sorbents show the potential to reduce alkali-related problems during solid fuel conversion such as deposit build-up and corrosion damages. The alkali capacity, the reaction kinetics and the surface area development of the sorbents under operating conditions are essential parameters for the mathematical description of the alkali sorption. In this work, three sorbents, kaolin, bauxite and bentonite, are characterized in this regard by thermogravimetric analysis. The sorption behavior of kaolin surpasses the other sorbents due to the highest loading capacity and the temperature-stability of the porous structure. However, the suitability as sorbent in solid fuel conversion processes is given for all materials. A mathematical sorption model is applied to the experimental data in order to derive kinetic parameters of the sodium and potassium sorption under syngas and flue gas atmosphere. Thus, this work provides the necessary dataset for the design and optimization of the sorbent use in industrial processes.
KW - Alkali removal
KW - Kinetic studies
KW - Mineral sorbents
KW - Solid fuel conversion
KW - Thermogravimetric analysis
UR - http://www.scopus.com/inward/record.url?scp=85106954267&partnerID=8YFLogxK
U2 - 10.1016/j.powtec.2021.05.074
DO - 10.1016/j.powtec.2021.05.074
M3 - Article
AN - SCOPUS:85106954267
SN - 0032-5910
VL - 390
SP - 190
EP - 196
JO - Powder Technology
JF - Powder Technology
ER -