TY - JOUR
T1 - A Comprehensive Study of the Washcoating of MCM-41 on Stainless Steel Tubular Microreactors
AU - García, Diana C.
AU - Sánchez, Jorge H.
AU - Martínez A, J. Juan David
AU - Alarcón, Edwin A.
AU - Villa, Aída Luz
N1 - Publisher Copyright:
© 2021, ASM International.
PY - 2021/8
Y1 - 2021/8
N2 - A method for washcoating of MCM-41 onto the internal surface of a stainless steel tubular microreactor was developed. The suspension was prepared with polyvinyl alcohol, milled MCM-41, colloidal silica, water, and acetic acid, with mass percentage of x1, x2, x3, x4 and x5, respectively. The effect of the slurry composition on the characteristics of the coating (adhesion, thickness and loading) was identified by a statistical mixture design; values of x1, x2, x3 and x4 were varied and x5 was fixed in 1.0 wt.%. The thickness and homogeneity of the coating in the microreactor were evaluated by SEM, while loading and adhesion were gravimetrically estimated. In the cases, a good adherence layer was found. The statistical methodology of mixture D-Optimal type showed that the component of the suspension with the highest effect on the coating properties was PVA. Thickness (22 ± 5 µm) and loading (2.59 mg/cm2) of the coating were optimized with the criteria of a minimum thickness with a maximum possible loading due to the need to find the right combination to increase microreactor efficiency in applications such as catalysis. The optimal composition of the suspension obtained by statistical analysis was PVA (1.9 wt.%), MCM-41 (15.2 wt.%), colloidal silica (5.0 wt.%) and water (76.9 wt.%).
AB - A method for washcoating of MCM-41 onto the internal surface of a stainless steel tubular microreactor was developed. The suspension was prepared with polyvinyl alcohol, milled MCM-41, colloidal silica, water, and acetic acid, with mass percentage of x1, x2, x3, x4 and x5, respectively. The effect of the slurry composition on the characteristics of the coating (adhesion, thickness and loading) was identified by a statistical mixture design; values of x1, x2, x3 and x4 were varied and x5 was fixed in 1.0 wt.%. The thickness and homogeneity of the coating in the microreactor were evaluated by SEM, while loading and adhesion were gravimetrically estimated. In the cases, a good adherence layer was found. The statistical methodology of mixture D-Optimal type showed that the component of the suspension with the highest effect on the coating properties was PVA. Thickness (22 ± 5 µm) and loading (2.59 mg/cm2) of the coating were optimized with the criteria of a minimum thickness with a maximum possible loading due to the need to find the right combination to increase microreactor efficiency in applications such as catalysis. The optimal composition of the suspension obtained by statistical analysis was PVA (1.9 wt.%), MCM-41 (15.2 wt.%), colloidal silica (5.0 wt.%) and water (76.9 wt.%).
KW - MCM-41
KW - design of experiments
KW - microreactor
KW - washcoating
UR - http://www.scopus.com/inward/record.url?scp=85106421984&partnerID=8YFLogxK
U2 - 10.1007/s11665-021-05860-8
DO - 10.1007/s11665-021-05860-8
M3 - Artículo en revista científica indexada
AN - SCOPUS:85106421984
SN - 1059-9495
VL - 30
SP - 6345
EP - 6354
JO - Journal of Materials Engineering and Performance
JF - Journal of Materials Engineering and Performance
IS - 8
ER -