Lattice-shaped geopolymer catalyst for biodiesel synthesis fabricated by additive manufacturing

Innocentini, M. D. M.; Botti, Renata; Bassi, Paula M.; Paschoalato, Cristina Filomêna Pereira Rosa; Flumignan, Danilo Luiz; Franchin, Giorgia; Colombo, Paolo

doi:10.1016/j.ceramint.2018.09.239

Cited by 40 publications

(16 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This review is focused on the use of geopolymer foams in their bulk-type form, not as a powder (relevant literature can be found in [195,200]). To the best of our knowledge, there is only one study addressing the use bulk-type geopolymer for biodiesel synthesis [201]. In this work, a geopolymer mixture was shaped into a lattice by additive manufacturing (see Fig.…”

Section: Catalystsmentioning

confidence: 99%

Geopolymer foams: An overview of recent advancements

Novais

Pullar

Labrincha

2020

Progress in Materials Science

188

View full text Add to dashboard Cite

Section: Catalystsmentioning

confidence: 99%

Geopolymer foams: An overview of recent advancements

Novais

Pullar

Labrincha

2020

Progress in Materials Science

188

View full text Add to dashboard Cite

“…The microstructure of geopolymers is temperature dependent: an amorphous structure is present at low temperatures, while heat treatments above~500-700 • C lead to (partially) crystalline structures [11]. Geopolymers have been recently investigated as potential heterogeneous catalysts for biodiesel production [12][13][14][15]. The catalyst's specific surface area is relevant for the reactions using heterogeneous catalysts because it represents the catalytic site's accessibility, and for mesoporous materials, the surface area can be large.…”

Section: Introductionmentioning

confidence: 99%

Biodiesel Processing Using Sodium and Potassium Geopolymer Powders as Heterogeneous Catalysts

et al. 2020

Self Cite

View full text Add to dashboard Cite

This work investigates the catalytic activity of geopolymers produced using two different alkali components (sodium or potassium) and four treatment temperatures (110 to 700 °C) for the methyl transesterification of soybean oil. The geopolymers were prepared with metakaolin as an aluminosilicate source and alkaline activating solutions containing either sodium or potassium in the same molar oxide proportions. The potassium-based formulation displayed a higher specific surface area and lower average pore size (28.64–62.54 m²/g; 9 nm) than the sodium formulation (6.34–32.62 m²/g; 17 nm). The reduction in specific surface area (SSA) after the heat treatment was more severe for the sodium formulation due to the higher thermal shrinkage. The catalytic activity of the geopolymer powders was compared under the same reactional conditions (70–75 °C, 150% methanol excess, 4 h reaction) and same weight amounts (3% to oil). The differences in performance were attributed to the influences of sodium and potassium on the geopolymerization process and to the accessibility of the reactants to the catalytic sites. The Na-based geopolymers performed better, with FAME contents in the biodiesel phase of 85.1% and 89.9% for samples treated at 500 and 300 °C, respectively. These results are competitive in comparison with most heterogeneous base catalysts reported in the literature, considering the very mild conditions of temperature, excess methanol and catalyst amount and the short time spent in reactions.

show abstract

“…Another explored approach is to prepare an injectable active phase-paste which is used to print the desired piece by extrusion of the paste [10][11][12][13][14][15]. This direct ink writing consists in the extrusion of concentrated suspensions formulated of main material together with additives to get appropriate viscoelastic behavior, which is the main requirement of this technology [16].…”

Section: Introductionmentioning

confidence: 99%

High Performance Tunable Catalysts Prepared by Using 3D Printing

et al. 2021

View full text Add to dashboard Cite

Honeycomb monoliths are the preferred supports in many industrial heterogeneous catalysis reactions, but current extrusion synthesis only allows obtaining parallel channels. Here, we demonstrate that 3D printing opens new design possibilities that outperform conventional catalysts. High performance carbon integral monoliths have been prepared with a complex network of interconnected channels and have been tested for carbon dioxide hydrogenation to methane after loading a Ni/CeO2 active phase. CO2 methanation rate is enhanced by 25% at 300 °C because the novel design forces turbulent flow into the channels network. The methodology and monoliths developed can be applied to other heterogeneous catalysis reactions, and open new synthesis options based on 3D printing to manufacture tailored heterogeneous catalysts.

show abstract

Lattice-shaped geopolymer catalyst for biodiesel synthesis fabricated by additive manufacturing

Cited by 40 publications

References 10 publications

Geopolymer foams: An overview of recent advancements

Geopolymer foams: An overview of recent advancements

Biodiesel Processing Using Sodium and Potassium Geopolymer Powders as Heterogeneous Catalysts

High Performance Tunable Catalysts Prepared by Using 3D Printing

Contact Info

Product

Resources

About