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portland cement pyrolysis

Determination of grinding aids in portland cement by ...

1998-9-1  Direct pyrolysis of cement. A systematic evaluation of pyrolysis temperature and heating rate over the ranges listed in Table 2 found that among the six grinding aid compounds only phenol could be readily desorbed and identified by direct pyrolysis of Portland cement. GC-MS results from the pyrolysis of cement samples interground with the 200 ...

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(PDF) Portland Cement -Catalyzed Pyrolysis of Waste ...

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 a ...

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Conventional and cement-catalyzed co-pyrolysis of rice ...

2021-4-2  The Portland cement catalyst was purchased from a local cement company in China. The rice straw and waste polyethylene co-pyrolysis experiments were performed in a domestically designed fixed bed reactor. The reactor consisted of a stainless tube heated by resistance heaters. ... The mechanism of cement catalyzed pyrolysis can be described in ...

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Novel pyrolysis-gas chromatography/mass spectrometric ...

1998-8-1  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.

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Production of oil and gas through thermal and thermo ...

2020-8-1  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.

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Recent advancements in the use of biochar for

2020-11-1  Similarly, Ofori-Boadu et al. reported a reduction in flow when swine biochar was incorporated as a replacement of Portland cement in cement pastes. The fluidity of paste containing 2.5%, 5% and 10% swine biochar as replacement of Portland cement is 20%, 33% and 36% lower than the paste without biochar.

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Converting plastic waste pyrolysis ash into flash graphene ...

2021-4-15  Ordinary Portland cement nanocomposites were prepared by dissolving varying concentrations of prepared tFG in a 1% water-Pluronic F-127 solution. The tFG was then dispersed via agitation for 15 min at 5000 rpm using a shear mixer (Silverson L5MA). The tFG dispersions were then mixed with Portland cement (0.40 water:cement ratio).

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Use of biochar from rice husk pyrolysis: assessment of ...

2021-11-1  The use of biochar from rice husk pyrolysis has proven to be a suitable material for the replacement of cement in the construction industry. All the biochar obtained at different temperatures show high reactivity in all the replaced percentages, but it is the 20 and 25% that show the best performance on day 180.

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废塑料裂解方面的应用 - 知乎

2020-12-3  Waste Plastic Pyrolysis in Free-Fall Reactors.2006 [11] Zahid Hussain Maria Imtiaz Muhammad Y. Naz Khalid M. Khan Nasser M. AbdEl-Salam Khalid A. Ibrahim. Thermal and clinker-catalyzed pyrolyses of polystyrene waste using

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Journal of Cleaner Production期刊最新论文, 化学/材料, - X

Journal of Cleaner Production期刊最新论文,,顶级期刊最新论文图文内容,出版社网站每日同步更新,点击标题直达论文原文,自定义关注的期刊,覆盖PubMed的论文库,快速方便精准的找到

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(PDF) Portland Cement -Catalyzed Pyrolysis of Waste ...

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 a ...

More

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.

More

Production of oil and gas through thermal and thermo ...

2020-8-1  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.

More

A study on the oil-based drilling cutting pyrolysis ...

2017-6-12  The cement used in this study was commercial ordinary Portland cement 42.5 (P.O. 42.5) from Chongqing Huaxin Cement Co., Ltd. Oil-base drilling cutting pyrolysis residues (ODPRs) was provided by Chongqing Fuling Shale Gas Exploration and Development Company, SINOPEC (China); fly ash and clay were provided by a power plant in Chongqing City (China).

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木质素资源利用的研究进展-【维普期刊官网】- 中文期刊 ...

Novel pyrolysis gas chromatography mass spectrometric techniques for the characterization of chemical additives in Portland cement and concrete[J]. Journal of Analytical and Applied Pyrolysis, 1998,46 (2) :85被引量:1 9 Wen S. Grinding aids for ...

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(PDF) CONVERSION OF SPENT FAT OIL INTO LIQUID AND

The pyrolysis reaction was catalyzed by three catalysts of the clinker type, namely ordinary Portland cement, white cement and burnt clay/clinker

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Organic chemistry of calcium. Formation and pyrolysis of ...

2002-5-1  The use of calcium hydroxide pretreatment to overcome agglomeration of technical lignin during fast pyrolysis. Green Chemistry 2015, 17 (10) , 4748-4759. DOI: 10.1039/C5GC01611H. Thomas D. Dyer. Characterisation of two chemical compounds formed between hydrated portland cement and benzene-1,2-diol (pyrocatechol).

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Ex Situ Catalytic Pyrolysis of a Mixture of Polyvinyl ...

2019-7-15  In the context of chemical recycling of mixed plastics and paper, multitemperature step pyrolysis has shown good potential for the separation of oxygenated products from hydrocarbons. Here, we report results of an investigation of the first pyrolysis step at low temperature, which involves the dehydrochlorination of polyvinyl chloride (PVC) and the

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Long-term leaching behaviours of cement composites ...

Abstract. In order to evaluate the long-term environmental impact of Eco-Ordinary Portland Cement (EOPC) prepared by municipal solid wastes (MSS) and hazardous wastes (HW), consecutive leaching tests with a time span of 180 days were conducted on the EOPC composites in the compact and ground forms under deionized and saline water conditions.

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Evaluation of pervious concrete performance with ...

2021-5-1  Manufacturing cement in the industry is responsible for most of carbon dioxide (CO 2) emissions to the atmosphere, while producing biochar (BC) reduces CO 2 emissions to the atmosphere. Replacing a portion of cement with BC will be a win-win alternative to curtail CO 2 emissions and simultaneously lock up BC. However, the mechanical performance and

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(PDF) Portland Cement -Catalyzed Pyrolysis of Waste ...

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 a ...

More

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.

More

A study on the oil-based drilling cutting pyrolysis ...

2017-6-12  The cement used in this study was commercial ordinary Portland cement 42.5 (P.O. 42.5) from Chongqing Huaxin Cement Co., Ltd. Oil-base drilling cutting pyrolysis residues (ODPRs) was provided by Chongqing Fuling Shale Gas Exploration and Development Company, SINOPEC (China); fly ash and clay were provided by a power plant in Chongqing City (China).

More

(PDF) CONVERSION OF SPENT FAT OIL INTO LIQUID AND

The pyrolysis reaction was catalyzed by three catalysts of the clinker type, namely ordinary Portland cement, white cement and burnt clay/clinker

More

Organic chemistry of calcium. Formation and pyrolysis of ...

2002-5-1  The use of calcium hydroxide pretreatment to overcome agglomeration of technical lignin during fast pyrolysis. Green Chemistry 2015, 17 (10) , 4748-4759. DOI: 10.1039/C5GC01611H. Thomas D. Dyer. Characterisation of two chemical compounds formed between hydrated portland cement and benzene-1,2-diol (pyrocatechol).

More

SciELO - Brasil - CONVERSION OF SPENT FAT OIL INTO

The cement catalyzed pyrolysis produced the largest amount of the oil, which is ascribed to the hydrogenations, presence of alkyl radicals and holding of organic moieties. White cement, unlike ordinary Portland cement, was rich in lime and contained small percentage of iron compounds.

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Effect of Biochar Filler on the Hydration Products and ...

2021-12-15  The carbonation of Portland cement, metakaolin and limestone mortars has been investigated after hydration for 91 days and exposure to

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Decomposition of ion exchange resins by pyrolysis

2021-12-27  Abstract. Pyrolysis of spent ion exchange resins is one of the most effective methods for reducing radioactive waster volume and for making the final waste form more stable. Fundamental experiments were performed to clarify the pyrolysis characteristics of anion and cation exchange resins. Residual elemental analyses and off-gas analyses showed ...

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Ex Situ Catalytic Pyrolysis of a Mixture of Polyvinyl ...

2019-7-15  In the context of chemical recycling of mixed plastics and paper, multitemperature step pyrolysis has shown good potential for the separation of oxygenated products from hydrocarbons. Here, we report results of an investigation of the first pyrolysis step at low temperature, which involves the dehydrochlorination of polyvinyl chloride (PVC) and the

More

Long-term leaching behaviours of cement composites ...

Abstract. In order to evaluate the long-term environmental impact of Eco-Ordinary Portland Cement (EOPC) prepared by municipal solid wastes (MSS) and hazardous wastes (HW), consecutive leaching tests with a time span of 180 days were conducted on the EOPC composites in the compact and ground forms under deionized and saline water conditions.

More