Geopolymer synthetized from bottom coal ash and calcined paper sludge

Santa, Rozineide A. Antunes Boca; Bernardin, Adriano Michael; Riella, Humberto Gracher; Kuhnen, Nivaldo Cabral

doi:10.1016/j.jclepro.2013.05.017

Cited by 142 publications

(32 citation statements)

References 13 publications

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“…Yan et al identified that the partial substitution of fly ash with dried (uncalcined) paper sludge reduced the workability and compressive strength of the alkali‐activated cements; however, it did promote a refinement of the pore structure which led to a reduced drying shrinkage of the material. Antunes Boca Santa et al produced alkali‐activated calcined paper sludge cements blended with coal bottom ashes, as the calcined paper sludge utilised was partially crystalline and not highly reactive. Higher contents of bottom ash contributed to increase the mechanical strength and density of the cements.…”

Section: Wastes From Other Industriesmentioning

confidence: 99%

Management and valorisation of wastes through use in producing alkali‐activated cement materials

Bernal

Rodríguez

Kirchheim

et al. 2016

J of Chemical Tech & Biotech

144

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ReuseUnless indicated otherwise, fulltext items are protected by copyright with all rights reserved. The copyright exception in section 29 of the Copyright, Designs and Patents Act 1988 allows the making of a single copy solely for the purpose of non-commercial research or private study within the limits of fair dealing. The publisher or other rights-holder may allow further reproduction and re-use of this version -refer to the White Rose Research Online record for this item. Where records identify the publisher as the copyright holder, users can verify any specific terms of use on the publisher's website. TakedownIf you consider content in White Rose Research Online to be in breach of UK law, please notify us by emailing eprints@whiterose.ac.uk including the URL of the record and the reason for the withdrawal request. Abstract 15There is a growing global interest in maximising the re-use and recycling of waste, to 16 minimise the environmental impacts associated with waste treatment and disposal. Use 17 of high-volume wastes in the production of blended or novel cements (including alkali-18 activated cements) is well known as a key pathway by which these wastes can be re-19 used. This paper presents a critical overview of the urban, agricultural, mining and 20 industrial wastes that have been identified as potential precursors for the production of 21 alkali-activated cement materials, or that can be effectively stabilised/solidified via 22 alkali activation, to assure their safe disposal. The central aim of this review is to 23 elucidate the potential advantages and pitfalls associated with the application of alkali-24 activation technology to a wide variety of wastes that have been claimed to be suitable 25 for the production of construction materials. A brief overview of the generation and 26 characteristics of each waste is reported, accompanied by identification of opportunities 27 for the use of alkali-activation technology for their valorisation and/or management. 28

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Section: Wastes From Other Industriesmentioning

confidence: 99%

Management and valorisation of wastes through use in producing alkali‐activated cement materials

Bernal

Rodríguez

Kirchheim

et al. 2016

J of Chemical Tech & Biotech

144

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“…This sludge contains a substantial amount of silica and alumina as crystalline kaolinite, which can be used to produce geopolymer cement. Physicochemical and mechanical properties of geopolymer cement depend on the nature of Aluminosilicate source (mineralogical composition, degree of crystallinity) [13][14][15][16][17], calcination method and temperature [18][19][20], nature of alkali metal cations [21,22], Si/Al molar ratio [23,24], Na 2 SiO 3 /NaOH mass ratio [25,26], Na 2 O/Al 2 O 3 molar ratios [27], temperature and curing time [28][29][30]. This research introduces a comparative study between two geopolymers, synthesized from two different raw materials: The industrial sludge and Metakaolin.…”

Section: Introductionmentioning

confidence: 99%

Comparison of the microstructure and the compressive strength of two geopolymers derived from Metakaolin and an industrial sludge

Belmokhtar

Ammari

Brigui

et al. 2017

Construction and Building Materials

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“…The peak frequencies allocated at 3,420 and 1,651 cm −1 corresponded, respectively, to the stretching and bending vibrations of water molecules . The bands assigned at 517 and 470 cm −1 are recognized to the deformed vibration of Si‐O‐Al and Si‐O‐Si networks, respectively . The band located at 797 cm −1 corresponds to OH deformation linked to Al 3+ or Mg 2+ .…”

Section: Resultsmentioning

confidence: 93%

Green synthesis of bio‐ethyl acetate over Egyptian natural red clay as a highly active, selective, and eco‐friendly catalyst

Said

Goda

2019

J Chinese Chemical Soc

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The present work focused on the utilization of Egyptian red clay (ERC) without any treatment as a highly efficient, selective, and eco-friendly catalyst for synthesis of bio-ethyl acetate in the gas phase. The best conditions used in conventional fixed bed reactor were 130 cm 3 /min total flow rate of air with 1.6 and 2.1 vol% bio-ethanol and bio-acetic acid, respectively, 1 g clay catalyst calcined at 300 and 225 C reaction temperature. Under these conditions, the conversions to ester achieved were about 80 and 98% after 5 and 30 min, respectively, from the initial admission of the reactants into the reactor. The amount and type of surface acidity were identified by isopropanol reaction and chemisorption of basic probes. The results demonstrated that the majority of intermediate strength of BrØnsted acid sites are the key role for the dehydration reaction toward ester formation. The virgin and annealed clay solids were characterized using X-ray fluorescence (XRF), thermogravimetry (TG) and differential thermal analysis (DTA), Fourier transform infrared (FTIR), X-ray diffraction (XRD), and N 2 sorption. K E Y W O R D Sacidity, clay, Ester, stability, XRF

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Geopolymer synthetized from bottom coal ash and calcined paper sludge

Cited by 142 publications

References 13 publications

Management and valorisation of wastes through use in producing alkali‐activated cement materials

Management and valorisation of wastes through use in producing alkali‐activated cement materials

Comparison of the microstructure and the compressive strength of two geopolymers derived from Metakaolin and an industrial sludge

Green synthesis of bio‐ethyl acetate over Egyptian natural red clay as a highly active, selective, and eco‐friendly catalyst

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