| Title | Acorn gasification char valorisation in the manufacture of alkali activated materials |
|---|---|
| ID_Doc | 23730 |
| Authors | Gómez-Casero, MA; Calado, L; Romano, P; Eliche-Quesada, D |
| Title | Acorn gasification char valorisation in the manufacture of alkali activated materials |
| Year | 2023 |
| Published | |
| Abstract | The use of biomass for energy production is becoming increasingly common. An energy source with good prospects for the future is the gasification process of biomass waste. This process is characterized by the partial oxidation of the raw material at high temperatures, which converts the raw material into a mixture of combustible gases. However, one of the problems when using biomass is the ash produced in the gasification process. This study investigates the effect of the incorporation of ash generated in the production of syngas from biomass residues from the acorn industry on the physical, mechanical and thermal performance of electric arc furnace slag (EAFS) based alkaline activated cements for industrial applications. Acorn gasification ash (AGA) after a calcination process were used to replace EAFS at different substitution ratios: 0, 25, 50, 75 and 100 wt%. The influence of the modulus of the activator (Ms = SiO2/K2O = 0.89; 1.38 and 1.84) was also studied. The specimens were evaluated for density, porosity, flexural and compressive strength, thermal conductivity, X-ray diffraction analysis, infrared spectroscopy, and microstructure development at 1, 7, 28 and 56 days of curing. The results showed that the inclusion of up to 50 wt% AGA gives rise to cements with similar or higher compressive strength than the control cement containing only EAFS. The optimum activator modulus depends on the proportion of precursors used, increasing with increasing AGA content. Therefore, the activator ratio and AGA content are factors that must be considered simultaneously to achieve the optimum compressive strength. The main reaction product was C-(A)-S-H gel, and to a lesser extent K-(A)-S-H gel and C-K-(A)-S-H hybrid gel. This work suggests the use of AGA improve alkali activated metallurgical slag binders, partially substituting the conventional Portland cement as structural material. |
| https://doi.org/10.1016/j.conbuildmat.2023.133533 |
Similar Articles
| ID | Score | Article |
|---|---|---|
23147
|
Gomez-Casero, MA; Perez-Villarejo, L; Sanchez-Soto, PJ; Eliche-Quesada, D Comparative study of alkali activated cements based on metallurgical slags, in terms of technological properties developed(2022) | |
| 11115
|
Ghorbani, S; Stefanini, L; Sun, YB; Walkley, B; Provis, JL; De Schutter, G; Matthys, S Characterisation of alkali-activated stainless steel slag and blast-furnace slag cements(2023) | |
| 15042
|
Fort, J; Mildner, M; Keppert, M; Abed, M; Cerny, R Potential of industrial waste as alternative alkaline activator for development of eco-efficient mortars(2023) | |
| 6707
|
Rasmus, J; Ohenoja, K; Oksanen, J; Adesanya, E; Kinnunen, P; Illikainen, M Alternative alkali activator from pulp mill waste - One-part blast furnace slag mortar activated with recovery boiler fly ash(2023) | |
| 14693
|
Komnitsas, K; Yurramendi, L; Bartzas, G; Karmali, V; Petrakis, E Factors affecting co-valorization of fayalitic and ferronickel slags for the production of alkali activated materials(2020) | |
| 18829
|
Lancellotti, I; Piccolo, F; Traven, K; Cesnovar, M; Ducman, V; Leonelli, C Alkali Activation of Metallurgical Slags: Reactivity, Chemical Behavior, and Environmental Assessment(2021)Materials, 14.0, 3 | |
| 10468
|
Xu, RS; Wang, HR; Yang, RH; Kong, FH; Hong, T The potential of copper slag as a precursor for partially substituting blast furnace slag to prepare alkali-activated materials(2024) | |
| 19883
|
Gómez-Casero, MA; Bueno-Rodríguez, S; Castro, E; Quesada, DE Alkaline activated cements obtained from ferrous and non-ferrous slags. Electric arc furnace slag, ladle furnace slag, copper slag and silico-manganese slag(2024) | |
| 19702
|
Lei, ZH; Pavia, S Geopolymer based on biomass ash from agricultural residues(2024) | |
| 15860
|
Díaz, AG; Bueno, S; Villarejo, LP; Eliche-Quesada, D Improved strength of alkali activated materials based on construction and demolition waste with addition of rice husk ash(2024) |