Novel procedure of CO<sub>2</sub> capture of the CaO sorbent activator on the reaction of one-part alkali-activated slag

Zheng, Hao; He, Yan; Zhu, Yuqing; Liu, Leping; Cui, Xuemin

doi:10.1039/d1ra01353j

Cited by 20 publications

(7 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…All curves indicated that decomposition mainly occurred in the second stage and was complete at about 800 °C. The weight loss found from the TGA measurements agreed fairly well with that expected for the decomposition of hydroxy carbonates (M2CO3(OH)2) to different oxides of Ca and Ce [39,40]. TGA analysis was used to investigate the thermal stability of the CaO, CeO 2 , and xCaO@CeO 2 catalysts, showing a gradual and complex degradation process (Figure 5).…”

Section: Catalysts Characterizationsupporting

confidence: 72%

Preparation of CaO@CeO2 Solid Base Catalysts Used for Biodiesel Production

Kingkam,

Maisomboon,

Khamenkit

et al. 2024

Catalysts

View full text Add to dashboard Cite

The study investigated the use of CeO2 extracted from monazite with calcium oxide (CaO) as a solid catalyst for biodiesel production. The wet impregnation method was used to produce CaO@CeO2 mixed-oxide catalysts with 0–50 wt.% CaO. X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET) surface area analysis, thermogravimetric analysis (TGA), and a Fourier transform infrared spectrometer (FTIR) was used to characterize the catalysts. In order to determine the optimal preparation conditions, the effect of different CaO compositions on the performance of CaO@CeO2 mixed-oxide catalysts was examined. The catalytic activity of the CaO@CeO2 catalyst for the transesterification reaction of palm oil to produce biodiesel was studied. The results show that the optimum yield of biodiesel can reach 97% fatty acid methyl ester over the 30CaO@CeO2 catalyst at the reaction conditions of 5 wt.% catalysts, methanol-to-oil molar ratio of 9:1, with a reaction temperature of 65 °C within 30 min. The results show that the high catalytic activity and stability of the CaO@CeO2 catalyst make it a promising candidate for industrial-scale biodiesel production. Further study is needed to improve the stability and efficiency of catalysts in transesterification reactions to achieve a high FAME yield using long-life-span catalysts. Moreover, it is necessary to investigate the economic feasibility of this process for application in large-scale biodiesel production.

show abstract

Section: Catalysts Characterizationsupporting

confidence: 72%

Preparation of CaO@CeO2 Solid Base Catalysts Used for Biodiesel Production

Kingkam,

Maisomboon,

Khamenkit

et al. 2024

Catalysts

View full text Add to dashboard Cite

show abstract

“…Future studies can find ways to clean up the production of synthetic solid activators. For instance, a recent study on GGBS-based one-part mixes activated using CaO used solid activators for carbon capture with promising results [208]. Alternatively, solid activators from waste products can be used.…”

Section: Directions For Future Researchmentioning

confidence: 99%

One part alkali activated materials: A state-of-the-art review

El-Zeadani

Bompa

Elghazouli

2022

Journal of Building Engineering

View full text Add to dashboard Cite

“…As the amount of filler increased, so did the conductivity. Wood ashes, as other studies [ 36 ] and XRF analysis confirmed, are rich in CaO that in an aqueous solution can convert into Ca(OH) 2 and dissociate in Ca 2+ and 2OH − [ 37 ]. The former contributes to increasing the conductivity, and the latter increases the pH values.…”

Section: Resultsmentioning

confidence: 99%

Mosses on Geopolymers: Preliminary Durability Study and Chemical Characterization of Metakaolin-Based Geopolymers Filled with Wood Ash

2023

View full text Add to dashboard Cite

Burning wood is estimated to produce about 6–10% of ash. Despite the possibility of recycling wood ash (WA), approximately 70% of the wood ash generated is landfilled, causing costs as well as environmental pollution. This study aims to recycle WA in an alternative way by inserting it as filler in geopolymeric materials. Here, metakaolin, NaOH, sodium silicate, and WA are used to realize geopolymers. Geopolymers without and with 10, 20 and 30% of WA are synthesized and characterized after 7, 14, 28 and 56 days. The article’s study methods are related to geopolymers’ chemical, biological and mechanical properties. The geopolymers synthesized are compact and solid. The pH and conductivity tests and the integrity and weight loss tests have demonstrated the stability of materials. The FT-IR study and boiling water test have confirmed the successful geopolymerization in all samples. The antibacterial analysis, the moss growing test and the compressive strength test have given a first idea about the durability of the materials synthesized. Furthermore, the compressive strength test result has allowed the comparison from the literature of the specimens obtained with the Portland cement (PC). The results obtained bode well for the future of this material.

show abstract

Novel procedure of CO₂ capture of the CaO sorbent activator on the reaction of one-part alkali-activated slag

Abstract: The proposed strategy builds a bridge between the alkali-activated cement and CaO-based CO2 sorbents, and this study provides a facile and cost-effective method for controlling the reaction rate of alkali-activated slag.

Cited by 20 publications

References 28 publications

Preparation of CaO@CeO2 Solid Base Catalysts Used for Biodiesel Production

Preparation of CaO@CeO2 Solid Base Catalysts Used for Biodiesel Production

One part alkali activated materials: A state-of-the-art review

Mosses on Geopolymers: Preliminary Durability Study and Chemical Characterization of Metakaolin-Based Geopolymers Filled with Wood Ash

Contact Info

Product

Resources

About

Novel procedure of CO2 capture of the CaO sorbent activator on the reaction of one-part alkali-activated slag

Abstract: The proposed strategy builds a bridge between the alkali-activated cement and CaO-based CO2 sorbents, and this study provides a facile and cost-effective method for controlling the reaction rate of alkali-activated slag.

Cited by 20 publications

References 28 publications

Preparation of CaO@CeO2 Solid Base Catalysts Used for Biodiesel Production

Preparation of CaO@CeO2 Solid Base Catalysts Used for Biodiesel Production

One part alkali activated materials: A state-of-the-art review

Mosses on Geopolymers: Preliminary Durability Study and Chemical Characterization of Metakaolin-Based Geopolymers Filled with Wood Ash

Contact Info

Product

Resources

About

Novel procedure of CO₂ capture of the CaO sorbent activator on the reaction of one-part alkali-activated slag