Characterization of alkali bonded expanded perlite

Papa, Elettra; Medri, Valentina; Laghi, Luca; Aloysio, Giulia De; Bandini, Simone; Landi, Elena

doi:10.1016/j.conbuildmat.2018.10.086

Cited by 34 publications

(6 citation statements)

References 26 publications

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“…After activation of the perlite by alkaline solution, new bands are observed at 2965 and 1645 cm − 1 due to the presence of water molecules in the material structure. e band located at 1431 cm − 1 is attributed to antisymmetric vibrations of CO 2 3− ions, revealing that sodium carbonate is present in the structure of the geopolymer [21]. Figure 3.…”

Section: Ftir Analysismentioning

confidence: 99%

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Photocatalytic Degradation of Methylene Blue from Aqueous Medium onto Perlite-Based Geopolymer

Saufi

Alouani

Alehyen

et al. 2020

International Journal of Chemical Engineering

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In this work, geopolymer synthesized with perlite and an alkaline activator medium was evaluated as a new adsorbent and photocatalyst for degradation of methylene blue (MB) dye from an aqueous medium. The functional group, the structure, and the morphology of the raw and the synthesized materials were characterized using FT-IR, XRD, and SEM analysis. The degradation of MB in the contaminated solution was examined using the spectrophotometric technique. Several analysis methods revealed the formation of the aluminosilicate gel after the geopolymerization reaction. The kinetics data with UV and without UV irradiations were well fitted with the pseudo-second-order equation. The results indicated that the degradation efficiency of cationic dye by perlite-based geopolymer without and with UV was up to 88.94% and 97.87% in 4 hours, respectively. The degradation efficiencies of methylene blue are in the following order: perlite-based geopolymer under UV irradiations is greater than perlite-based geopolymer without UV irradiations that is larger than UV irradiations. The overall experimental results suggested that the new elaborated material with synergetic adsorption and photocatalytic activities has a great potential for the treatment of water contaminated by hazardous substances.

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Section: Ftir Analysismentioning

confidence: 99%

“…For perlite, the band located at 1632 cm − 1 is assigned to the vibration of OH groups. e large band observed at 1005 cm − 1 is assigned to the stretching vibrations of Si-O-M (M � Al or Si) [21]. e band located at O-Al [22].…”

Section: Ftir Analysismentioning

confidence: 99%

Photocatalytic Degradation of Methylene Blue from Aqueous Medium onto Perlite-Based Geopolymer

Saufi

Alouani

Alehyen

et al. 2020

International Journal of Chemical Engineering

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“…Perlite (P) is an inorganic chemically inert in many environments compound, composed mainly of SiO 2 , Al 2 O 3 , Na 2 O, K 2 O, and water [ 21 ]. Accordingly, with the estimation of global production, the leading producers of world production of perlite are China (47%), Greece (20%), Turkey (16%), and United States (13%) [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

Polyurethane Composites Reinforced with Walnut Shell Filler Treated with Perlite, Montmorillonite and Halloysite

Członka

Kairytė

Miedzińska

et al. 2021

IJMS

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In the following study, polyurethane (PUR) composites were modified with 2 wt.% of walnut shell filler modified with selected mineral compounds–perlite, montmorillonite, and halloysite. The impact of modified walnut shell fillers on selected properties of PUR composites, such as rheological properties (dynamic viscosity, foaming behavior), mechanical properties (compressive strength, flexural strength, impact strength), dynamic-mechanical behavior (glass transition temperature, storage modulus), insulation properties (thermal conductivity), thermal characteristic (temperature of thermal decomposition stages), and flame retardant properties (e.g., ignition time, limiting oxygen index, heat peak release) was investigated. Among all modified types of PUR composites, the greatest improvement was observed for PUR composites filled with walnut shell filler functionalized with halloysite. For example, on the addition of such modified walnut shell filler, the compressive strength was enhanced by ~13%, flexural strength by ~12%, and impact strength by ~14%. Due to the functionalization of walnut shell filler with thermally stable flame retardant compounds, such modified PUR composites were characterized by higher temperatures of thermal decomposition. Most importantly, PUR composites filled with flame retardant compounds exhibited improved flame resistance characteristics-in all cases, the value of peak heat release was reduced by ~12%, while the value of total smoke release was reduced by ~23%.

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“…Expanded perlite is a lightweight and porous material that has insulating properties. Thus, expanded perlite is a commonly used material in construction, petrochemical, and chemical industries (Rashad 2016;Różycka and Pichór 2016;Papa et al 2018). Turkey, Greece, USA, China, Japan, Hungary, and Italy are the countries that have a large share in world's total perlite production (Rashad 2016; Różycka and Pichór 2016).…”

Section: Introductionmentioning

confidence: 99%

Production of bio-oil via catalytic pyrolysis of medlar seeds

Topak

Akalın

2023

BioRes

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The pyrolysis of medlar seeds was performed at 350, 450, 550, and 650 °C with and without K2CO3, MgO, and expanded perlite (10 wt%). The maximum dichloromethane extract yield (6.70 wt%) was obtained at 450 °C in the pyrolysis experiments without catalyst, while the maximum bio-oil yield (50.3 wt%) was obtained at 650 °C in the presence of perlite. The dichloromethane extract and bio-oil yields decreased noticeably with the use of MgO and K2CO3. The bio-oils obtained from the non-catalytic runs mainly consisted of phenolic compounds. The use of catalysts had a noticeable effect on the composition and higher heating values of the bio-oils. The use of K2CO3 increased the relative content of 2-methoxyphenol at all tested temperatures and the relative content of 2,6-dimethoxyphenol and 2,6-dimethoxy-4-methylphenol increased with the use of expanded perlite at above 550 °C, while the use of MgO led to an increase in the relative content of 2,6-dimethoxy-4-methylphenol at above 550 °C. The bio-oil with the maximum higher heating value (30.4 MJ/kg) was obtained at 450 °C with the use of perlite. This study showed that medlar seeds are a good alternative source of waste biomass in the production of bio-oil that can be used as a biofuel.

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Characterization of alkali bonded expanded perlite

Cited by 34 publications

References 26 publications

Photocatalytic Degradation of Methylene Blue from Aqueous Medium onto Perlite-Based Geopolymer

Photocatalytic Degradation of Methylene Blue from Aqueous Medium onto Perlite-Based Geopolymer

Polyurethane Composites Reinforced with Walnut Shell Filler Treated with Perlite, Montmorillonite and Halloysite

Production of bio-oil via catalytic pyrolysis of medlar seeds

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