Use of spent catalyst from catalytic cracking in fluidized bed as a new concrete additive

Pacewska, Barbara; Wilińska, Iwona; Kubissa, Jacek

doi:10.1016/s0040-6031(98)00498-5

Cited by 44 publications

(18 citation statements)

References 3 publications

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“…As from seven (7) curing days, it is observed that peak 3 is higher for FCC and MK blended pastes, due to the high alumina content (Table 1) and the progress of pozzolanic reactions. This behavior matches with the one reported by other researches (Pacewska et al, 1998;Pacewska et al, 2000;Borrachero et al, 2002;Dweck et al, 2008 (Tseng et al, 2005;Paya et al, 2003;Zhang et al, 2012 (Torres et al, 2009;Pacewska et al, 1998;Pacewska et al, 2002). The values here presented explain some unusual results reported by former studies regarding curing ages up to 28 days (Trochez et al, 2010).…”

Section: Such Blended Materials May Come From Differentsupporting

confidence: 92%

Cemento adicionado con un residuo del proceso de craqueo catalítico (FCC): hidratación y microestructura

et al. 2013

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ResumenEl presente trabajo estudia el efecto de la incorporación de un residuo procedente de la industria petroquímica denominado catalizador gastado del craqueo catalítico (FCC) en la hidratación y microestructura de pastas cementicias. Se utilizan como materiales de referencia, además del cemento portland (OPC), dos tipos de adición de alto desempeño, metacaolín (MK) y humo de sílice (HS). La caracterización de los productos de hidratación se realizó por medio de difracción de rayos X (DRX), análisis termogravimétrico (TG), microscopia electrónica de barrido (SEM) y resonancia magnética nuclear (NMR). Se complementa este estudio con la evaluación de la resistencia mecánica a compresión de morteros a edad hasta de 90 días. Los resultados indican que los principales productos de hidratación en las pastas adicionadas con FCC son silicato cálcico hidratado (CSH), aluminatos cálcicos hidratados (CAH) y silicoaluminatos cálcicos hidratados (CASH). Pastas con 10% de FCC reportan un consumo de cal del 61% a edad de 360 días de curado, valor muy superior al reportado por las adiciones de MK y HS en la misma proporción, esto indica una mayor reactividad del FCC, que incluso se manifiesta a edades tempranas. Cabe anotar que, considerando el factor de dilución, la incorporación de un 10% de FCC como reemplazo del cemento contribuye a la resistencia del material adicionado en órdenes de hasta un 30%. Esto es un indicativo del uso potencial de este residuo como material suplementario en mezclas cementicias. Palabras Clave: Catalizador gastado de Craqueo Catalítico, Cementos Adicionados, Productos de Hidratación, Resistencia mecánica a compresión Abstract The effect of the incorporation of a petrochemical industry waste, named spent fluid catalytic cracking (FCC) in the hydration process and microstructure of cement paste, was studied. Portland cement (OPC) pastes, with and without addition of meta-kaolin (MK) and silica fume (SF), were used as reference materials. The characterization of the type of hydration products was performed by using X-ray diffraction (XRD), thermo-gravimetric analysis (TG), scanning electron microscopy (SEM) and nuclear magnetic resonance (NMR). This study is complemented with the evaluation of compressive strength of blended cement mortars up to

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Section: Such Blended Materials May Come From Differentsupporting

confidence: 92%

Cemento adicionado con un residuo del proceso de craqueo catalítico (FCC): hidratación y microestructura

et al. 2013

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“…This waste catalyst has been studied as a potential supplementary cementitious material for the production of blended cements, and high performance mortars and concretes have been produced in this manner. The reactivity of this waste varies depending on the nature of the initial catalyst used, therefore optimisation studies are required when using materials from different sources. The production of this waste is relatively low, around 800 000 tons per year worldwide in 2010, which has limited its large‐scale adoption as a partial replacement of Portland cements in concrete production.…”

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

133

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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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“…In the search for ways to utilize this waste, the application of SFCC as an alternative supplementary cementitious material for the production of blended cements has been explored (2,3). The pozzolanic activity of SFCC from different sources has been demonstrated, and the production of high performance Portland cement-based mortars and concretes has been achieved (1).…”

Section: Introductionmentioning

confidence: 99%

Synthesis of geopolymer from spent FCC: Effect of SiO<sub>2</sub>/Al<sub>2</sub>O<3 and Na2O/SiO2 molar ratios

Trochez¹,

Gutiérrez²,

Rivera³

et al. 2015

Mater. construcc.

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This paper assesses the feasibility of using a spent fluid catalytic cracking catalyst (SFCC) as precursor for the production of geopolymers. The mechanical and structural characterization of alkaliactivated SFCC binders formulated with different overall (activator + solid precursor) SiO 2 /Al 2 O 3 and Na 2 O/ SiO 2 molar ratios are reported. Formation of an aluminosilicate 'geopolymer' gel is observed under all conditions of activation used, along with formation of zeolites. Increased SiO 2 /Al 2 O 3 induces the formation of geopolymers with reduced mechanical strength, for all the Na 2 O/SiO 2 ratios assessed, which is associated with excess silicate species supplied by the activator. This is least significant at increased alkalinity conditions (higher Na 2 O/SiO 2 ratios), as larger extents of reaction of the spent catalyst are achieved. SiO 2 /Al 2 O 3 and Na 2 O/SiO 2 ratios of 2.4 and 0.25, respectively, promote the highest compressive strength (67 MPa). This study elucidates the great potential of using SFCC as precursor to produce sustainable ceramic-like materials via alkali-activation. RESUMEN: Sintesis de geopolimero basado en un catalizador gastado de craqueo catalitico (FCC): Efecto de las relaciones molares SiO 2 /Al2O 3 y Na 2 O/SiO 2 . Este artículo estudia la factibilidad de usar un catalizador gastado del proceso de craqueo (SFCC) para la producción de geopolímeros. Se evalúan las características mecánicas y estructurales de los geopolímeros producidos con diferentes relaciones molares (activador + precursor solido) de SiO 2 /Al 2 O 3 y Na 2 O/SiO 2 . La formación de un gel geopolimérico de tipo aluminosilicato se observa a las diferentes condiciones evaluadas, así como la formación de zeolitas. Un incremento en la relación SiO 2 /Al 2 O 3 genera geopolímeros de baja resistencia mecánica, a las diferentes relaciones molares Na 2 O/SiO 2 evaluadas, como consecuencia del exceso de especies silicato provenientes del activador. Este efecto es menos significativo al incrementar las condiciones de alcalinidad (mayores relaciones Na 2 O/SiO 2 ), ya que un mayor grado de reacción del catalizador gastado es alcanzado. Las relaciones SiO 2 /Al 2 O 3 y Na 2 O/SiO 2 de 2.4 and 0.25, respectivamente, promueven la mayor Resistencia a la compresión (67 MPa). Este estudio muestra el gran potencial de uso del SFCC como precursor en materiales cerámicos obtenidos por activación alcalina.

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Use of spent catalyst from catalytic cracking in fluidized bed as a new concrete additive

Cited by 44 publications

References 3 publications

Cemento adicionado con un residuo del proceso de craqueo catalítico (FCC): hidratación y microestructura

Cemento adicionado con un residuo del proceso de craqueo catalítico (FCC): hidratación y microestructura

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

Synthesis of geopolymer from spent FCC: Effect of SiO<sub>2</sub>/Al<sub>2</sub>O<3 and Na2O/SiO2 molar ratios

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