Additively Manufactured Geopolymer Monoliths as Robust Supports for High Temperature Catalytic Reactions
Rafael Vidal Eleutério, Lisandro Simão, Maíra Palm, Rafael Catapan, Dachamir Hotza
TL;DR
3D-printed geopolymer structures are shown to be durable and effective supports for high-temperature catalytic reactions like methane steam reforming.
Contribution
This work demonstrates the use of 3D-printed geopolymers as thermally stable catalyst supports through material extrusion and Ni impregnation.
Findings
3D-printed geopolymer monoliths retained mechanical integrity after calcination at 800 °C.
Ni-geopolymer catalysts showed stable performance in methane steam reforming at high temperatures.
Alkali-rich geopolymer matrix stabilized nickel aluminosilicate phases, enhancing metal-support interactions.
Abstract
Additively manufactured geopolymers are emerging as a versatile class of structured materials combining thermal and mechanical resilience for application in extreme environments. In this work, porous geopolymer monoliths were fabricated by material extrusion (MEX) using tailored metakaolin-based pastes, and printability was quantitatively assessed through a rheological protocol that links precursor attributes to processing behavior. The resulting 3D-printed structures (70% porosity, 30 m2/g) retained mechanical integrity after calcination at 800 °C, in contrast to conventionally cast counterparts that suffered severe strength loss. Upon Ni impregnation, temperature-programmed reduction (TPR-H2) evidenced strong metal–support interactions and the formation of stable nickel aluminosilicate phases, highlighting the role of the alkali rich geopolymer matrix in interfacial stabilization. As…
Genes, proteins, chemicals, diseases, species, mutations and cell lines named across the full text — each resolved to its canonical identifier and authoritative record.
Click any figure to enlarge with its caption.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
Figure 12
Figure 13
Figure 14
Figure 15
Figure 16
Figure 17Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
Taxonomy
TopicsConcrete and Cement Materials Research · Heat and Mass Transfer in Porous Media · Advanced ceramic materials synthesis