Determination of grinding aids in portland cement by ...
01/09/1998 The pyrolysis of Portland cement followed by gas chromatography/mass spectrometry is described for the determination of chemical additives interground with cement clinkers known as grinding aids. This technique, coupled with in situ derivitization using BSTFA-TMCS reagent, has been found to be readily applicable for detecting phenol, along with five glycol and alkanolamine-type compounds in ...
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Thermal and clinker‐catalyzed pyrolyses of polystyrene ...
The Portland cement was used as a solid base to catalyze the pyrolysis reaction for improving the product yield, lowering the reaction temperature and shortening the reaction time. Optimum reaction conditions were investigated by varying the process temperature, process time, and amount of the catalyst. The catalytic conversion of polystyrene into oil was measured about 94.98% at 400°C. In ...
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Novel pyrolysis-gas chromatography/mass spectrometric ...
01/08/1998 The application of pyrolysis gas chromatography mass spectrometry (py-GC/MS) has been improved for the determination of chemical additives that are either interground with cement clinker during the manufacture of Portland cement or admixed with a mixture of cement, sand, and stone, and water for the production of concrete. This technique has been found to be readily applicable for phenol
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10.1016/S0008-8846(98)00109-4 DeepDyve
11/06/2020 The capability to obtain mass spectra on the eluted compounds was found to be quite useful for identifying the pyrolysis products from cement, especially since the grinding aid additives could possibly be transformed to other compounds either during the grinding process or when desorbed from the cement. Pyrolysis products obtained without ...
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Evaluation of the Reactivity of Artificial Mixtures of ...
Portland cement is a type of material obtained from the rotary kiln cooking of a mixture of limestone and clay, ... (C 3 A) phases synthesized by flame spray pyrolysis method (FSP), having a nanometric particle size show a higher dissolution speed compared to the alite phase (C 3 S) which has a larger particle size because its synthesis method is conventional and therefore its dissolution ...
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Pyrolysis-gas chromatography/mass spectrometric
The pyrolysis of Portland cement followed by gas chromatography/mass spectrometry is described for the determination of chemical additives interground with cement clinkers known as grinding aids ...
More
Two-Step Pyrolysis of Spirogyra for Fuels Using Cement ...
The thermal, white cement catalyzed, and Portland cement catalyzed pyrolysis produced 83.16%, 90.99%, and 89.61% relative amount of oil, respectively, at optimum temperature of 500 °C. For time ...
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Biochar as green additives in cement-based composites
10/06/2020 Ordinary Portland cement (OPC) (65.7% CaO, 19.0% SiO 2, 4.8% Al 2 O 3) was obtained from a local cement company (Green Island) in Hong Kong. River sand (0.063 mm–2 mm) was used as the fine aggregate in the mortar system. In this study, biochar was employed as a substitute for river sand at dosages of 1 wt%, 2 wt% and 5 wt%
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Use of biochar as carbon sequestering additive in cement ...
01/03/2018 It is known that ordinary Portland cement (OPC) contain some carbonate compounds. TGA of OPC used in the study showed that the carbonate content is negligible and therefore it is assumed that calcium carbonate is generated only from hydration products in the paste samples. Fig. 8 shows the mass change (%) of cement paste samples with saturated and unsaturated biochar subject
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Two-Step Pyrolysis of Spirogyra for Fuels Using Cement ...
The thermal, white cement catalyzed, and Portland cement catalyzed pyrolysis produced 83.16%, 90.99%, and 89.61% relative amount of oil, respectively, at optimum temperature of 500 °C. For time ...
More
Low–Temperature and Semi–Batch Production of Liquid
02/04/2020 In the present study, a Portland cement (PC) was used for the first time as very cheap and commercially available catalyst for the low– temperature pyrolysis of waste polypropylene (WPP) to diesel range pyrolytic oil, utilizing a single – stage semi–batch reactor designed well at appropriate pyrolyzer / catalytic reformer ratio. The thermal decomposition of WPP was studied using a ...
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Production of oil and gas through thermal and thermo ...
The thermal, white cement catalyzed, and Portland cement catalyzed pyrolysis produced 83.16%, 90.99%, and 89.61% relative amount of oil, respectively, at optimum temperature of 500 °C. For time optimization, the pyrolysis reaction was carried out for different time intervals between 15 and 78 min. The catalyst weight of 30% was found best option for increasing the hydrocarbon yield and ...
More
Evaluation of the Reactivity of Artificial Mixtures of ...
Portland cement is a type of material obtained from the rotary kiln cooking of a mixture of limestone and clay, ... (C 3 A) phases synthesized by flame spray pyrolysis method (FSP), having a nanometric particle size show a higher dissolution speed compared to the alite phase (C 3 S) which has a larger particle size because its synthesis method is conventional and therefore its dissolution ...
More
Recyclable, sustainable, and stronger than portland cement ...
solvent intensive – pyrolysis, steam explosion, extraction and filtra- ... tering product whereas portland cement production is one of the leading sources of anthropogenic CO 2. Given the similar cellulose and lignin content for other agricultural biproducts, we anticipate that the approach herein should be applicable to leveraging a wide range of lignocellulosic biomass waste products, thus ...
More
Pyrolysis-gas chromatography/mass spectrometric
The pyrolysis of Portland cement followed by gas chromatography/mass spectrometry is described for the determination of chemical additives interground with cement clinkers known as grinding aids ...
More
White cement and burnt brick powder catalyzed
The pyrolysis reactions were carried out by heating the waste polystyrene at 600°C in a preheated furnace. Results of this study are presented in Table 3. The amount of liquid product of thermal process increases with time up to 45 min. For white cement, the liquid product remained almost same for the investigated time. However, for burnt ...
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C-Zero arpa-e.energy.gov
C-Zero will develop a novel process for transforming methane into hydrogen and valorized carbon cement additive using high temperature liquids in a multi-phase pyrolysis reactor. Unlike current hydrogen generation technologies, C-Zero’s process will not directly coproduce carbon dioxide CO2 and does not require water as an input. If successful, this technology will allow C-Zero to ...
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Alternative Fuels in Cement Manufacturing IntechOpen
18/11/2010 The content of iron oxide in Portland cement is 1.5 - 4.5 percent on weight basis. On the other hand, although zinc oxide acts as a flux as well as mineraliser, it is known to have detrimental effect on the quality of cement if it is in excess. It strongly retards the setting time and strength of the cement if the total zinc content of all fuels exceeds 4000 parts per million (PPM)
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Pyrolysis Oil Market Global Industry Report, 2030
Cement industry is one of the major end users of pyrolysis oil. The cement industry has been expanding significantly across the globe, primarily in developing economies such as China and India, due to the rise in investment in the infrastructure sector. Growth in the cement industry is anticipated to create lucrative opportunities for the pyrolysis oil market across the globe. Pyrolysis Oil ...
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Pyrolysis-gas chromatography/mass spectrometric
The pyrolysis of Portland cement followed by gas chromatography/mass spectrometry is described for the determination of chemical additives interground with cement clinkers known as grinding aids ...
More
Low–Temperature and Semi–Batch Production of Liquid
02/04/2020 In the present study, a Portland cement (PC) was used for the first time as very cheap and commercially available catalyst for the low– temperature pyrolysis of waste polypropylene (WPP) to diesel range pyrolytic oil, utilizing a single – stage semi–batch reactor designed well at appropriate pyrolyzer / catalytic reformer ratio. The thermal decomposition of WPP was studied using a ...
More
Production of oil and gas through thermal and thermo ...
The thermal, white cement catalyzed, and Portland cement catalyzed pyrolysis produced 83.16%, 90.99%, and 89.61% relative amount of oil, respectively, at optimum temperature of 500 °C. For time optimization, the pyrolysis reaction was carried out for different time intervals between 15 and 78 min. The catalyst weight of 30% was found best option for increasing the hydrocarbon yield and ...
More
Recyclable, sustainable, and stronger than portland cement ...
solvent intensive – pyrolysis, steam explosion, extraction and filtra- ... tering product whereas portland cement production is one of the leading sources of anthropogenic CO 2. Given the similar cellulose and lignin content for other agricultural biproducts, we anticipate that the approach herein should be applicable to leveraging a wide range of lignocellulosic biomass waste products, thus ...
More
10.1016/S0008-8846(98)00109-4 DeepDyve
11/06/2020 The capability to obtain mass spectra on the eluted compounds was found to be quite useful for identifying the pyrolysis products from cement, especially since the grinding aid additives could possibly be transformed to other compounds either during the grinding process or when desorbed from the cement. Pyrolysis products obtained without ...
More
Mechanical and Microstructure Properties of Biochar-Based ...
In this research, biochar from the pyrolysis of MSW is investigated as a potential replacement for sand in Portland cement mortar. This not only provides a solution for the waste disposal problems, but also saves on the use of non-renewable natural resources globally and o ers an environmentally friendly source of construction material ...
More
Photocatalytic Cementitious Materials: Influence of the ...
Ultrasonic Spray Pyrolysis Fabrication of Solid and Hollow PbWO4 Spheres with Structure-Directed Photocatalytic Activity. ... Visible light induced water detoxification through Portland cement composites reinforced with photocatalytic filler: A leap away from TiO2. Construction and Building Materials 2016, 120, 364-372. DOI: 10.1016/j.conbuildmat.2016.05.114. Ranjit K. Nath, M.F.M. Zain, M ...
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Thermal and clinker-catalyzed pyrolyses of polystyrene ...
Polystyrene is a nondegradable lightweight foamy substance that easily blows from landfills into drains and waterways. This material creates litter []
More
C-Zero arpa-e.energy.gov
C-Zero will develop a novel process for transforming methane into hydrogen and valorized carbon cement additive using high temperature liquids in a multi-phase pyrolysis reactor. Unlike current hydrogen generation technologies, C-Zero’s process will not directly coproduce carbon dioxide CO2 and does not require water as an input. If successful, this technology will allow C-Zero to ...
More
Hazardous waste - Wikipedia
Portland cement ... Pyrolysis. Burning pieces of wood, showing various stages of pyrolysis followed by oxidative combustion. Some hazardous waste types may be eliminated using pyrolysis in a high temperature not necessarily through electrical arc but starved of oxygen to avoid combustion. However, when electrical arc is used to generate the required ultra heat (in excess of 3000 degree C ...
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Production of oil and gas through thermal and thermo ...
The thermal, white cement catalyzed, and Portland cement catalyzed pyrolysis produced 83.16%, 90.99%, and 89.61% relative amount of oil, respectively, at optimum temperature of 500 °C. For time optimization, the pyrolysis reaction was carried out for different time intervals between 15 and 78 min. The catalyst weight of 30% was found best option for increasing the hydrocarbon yield and ...
More
Scilit Article - Evaluation of the reactivity of ...
The Portland cement clinker consists of 95% calcium oxide, silicon, aluminium and iron and 5% impurities of magnesium, sodium, potassium, titanium, sulfur, phosphorus and manganese. From the combination of two or more of the main oxides, the constituents of the white clinker are formed, corresponding to alite(3CaO.SiO2 or C3S), belite (2CaO.SiO2 or C2S) and celite (Ca3Al2O6 or C3A),
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Recyclable, sustainable, and stronger than portland cement ...
solvent intensive – pyrolysis, steam explosion, extraction and filtra- ... tering product whereas portland cement production is one of the leading sources of anthropogenic CO 2. Given the similar cellulose and lignin content for other agricultural biproducts, we anticipate that the approach herein should be applicable to leveraging a wide range of lignocellulosic biomass waste products, thus ...
More
Recyclable, sustainable, and stronger than portland
APS 95 also outperforms portland cement in its recyclability by simple melt processing and is a carbon-negative/carbon sequestering product whereas portland cement production is one of the leading sources of anthropogenic CO 2. Given the similar cellulose and lignin content for other agricultural biproducts, we anticipate that the approach herein should be applicable to leveraging a wide range ...
More
Mechanical and Microstructure Properties of Biochar-Based ...
In this research, biochar from the pyrolysis of MSW is investigated as a potential replacement for sand in Portland cement mortar. This not only provides a solution for the waste disposal problems, but also saves on the use of non-renewable natural resources globally and o ers an environmentally friendly source of construction material ...
More
Thermal and clinker-catalyzed pyrolyses of polystyrene ...
Polystyrene is a nondegradable lightweight foamy substance that easily blows from landfills into drains and waterways. This material creates litter []
More
C-Zero arpa-e.energy.gov
C-Zero will develop a novel process for transforming methane into hydrogen and valorized carbon cement additive using high temperature liquids in a multi-phase pyrolysis reactor. Unlike current hydrogen generation technologies, C-Zero’s process will not directly coproduce carbon dioxide CO2 and does not require water as an input. If successful, this technology will allow C-Zero to ...
More
Hazardous waste - Wikipedia
Portland cement ... Pyrolysis. Burning pieces of wood, showing various stages of pyrolysis followed by oxidative combustion. Some hazardous waste types may be eliminated using pyrolysis in a high temperature not necessarily through electrical arc but starved of oxygen to avoid combustion. However, when electrical arc is used to generate the required ultra heat (in excess of 3000 degree C ...
More
Tire Pyrolysis Technologies Systems Producing Carbon ...
Klean's tire pyrolysis and gasification technology was developed in Japan in the early 1970's and were the world's first thermal process specifically designed to recover oil and energy from waste tires. Klean further refined this technology with the acquisitions of several other complimentary technologies, such as the merger between Carbon Resource Recovery GmbH. Historically, Japan has always ...
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The cement industries of southern Africa
11/12/2014 The integrated plant is operated under the trading name Matsiloje Portland Cement by Nortex Management Services (Pty) Ltd, based in Botswana. The plant's capacity is just 36,000t/yr of 32.5N grade cement, which is supplied exclusively to the local market. The plant was originally commissioned and operated by a different company between 2000 and mid 2001 before the operator
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