Two-dimensional lamellar phosphogypsum/polyethylene glycol composite PCM: Fabrication and characterization

Lou, Jinfen; Zhang, Kai; Qin, Shuhao; Yang, Lei; Liu, Yuanyuan; He, Ming; Yu, Jie

doi:10.1016/j.jiec.2022.06.018

Cited by 7 publications

(2 citation statements)

References 35 publications

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“…By 2015, the capacity of wet-process phosphoric acid production (calculated as P 2 O 5 ) in China was 21.7 million tons/year, and the capacity of phosphate fertilizer production (calculated as P 2 O 5 ) was 23.7 million tons/year, accounting for 40% of global production capacity and ranking first in the world . About 85–90% of phosphoric acid in the world is produced by the wet process, but as the most common method, the sulfuric acid process produces phosphogypsum as a byproduct, which is difficult to use and environmentally unfriendly. − Moreover, the hydrochloric acid wet-process method encounters purification problems, which is not efficient. The nitric acid wet-process method is one of the three most widely used wet processes for phosphoric acid production and does not have the problems discussed above.…”

Section: Introductionmentioning

confidence: 99%

Determination and Correlation of Vapor–Liquid Equilibria for the Nitric Acid + Water, Nitric Acid + Water + Phosphoric Acid, and Nitric Acid + Water + Phosphoric Acid + Sulfuric Acid System

Yang

et al. 2023

J. Chem. Eng. Data

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The wet-process production of phosphoric acid by the nitric acid method is considered as a promising technology with great development prospects due to no production of the byproduct phosphogypsum. However, the traditional nitro-phosphate fertilizer producing process cannot separate nitrogen and phosphorus thoroughly, which limits its applications. The key to solving this problem is to remove nitric acid from the crude phosphoric acid product obtained in the nitric acid wet process by evaporation. Therefore, it is important to measure the vapor−liquid equilibrium (VLE) data of the nitric acid + water + phosphoric acid + sulfuric acid quaternary system under different pressures and concentrations. In this study, the VLE data of the following systems were measured at 10, 20, 40, 60, 80, and 97.4 kPa by the quasistatic ebulliometric method: (1) nitric acid + water; (2) nitric acid + water + phosphoric acid; and (3) nitric acid + water + phosphoric acid + sulfuric acid. The electrolyte non-random two-liquid parameters for the following pairs were correlated with the VLE data by using Aspen Plus as a tool: HNO 3

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Section: Introductionmentioning

confidence: 99%

Determination and Correlation of Vapor–Liquid Equilibria for the Nitric Acid + Water, Nitric Acid + Water + Phosphoric Acid, and Nitric Acid + Water + Phosphoric Acid + Sulfuric Acid System

Yang

et al. 2023

J. Chem. Eng. Data

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“…J.F. Lou et al proved that it was feasible to combine two-dimensional lamellar anhydrous calcium sulfate and polyethylene glycol to prepare a nanocomposite phase change material [9].…”

Section: Introductionmentioning

confidence: 99%

Experimental Evaluation of the Properties of Asphalt Binders Modified with Calcium Sulfate Anhydrous Whiskers and Polyester Fibers

Fan,

Si,

Gao

2023

Coatings

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The use of waste calcium sulfate whiskers in pavement construction is cost-effective and beneficial to the environment. In this paper, modified asphalt binders are prepared by adding calcium sulfate anhydrous whiskers (ACSW, 9 wt.%,11 wt.%, and 13 wt.% by weight of asphalt binder) and polyester fibers (4 wt.%,6 wt.%, and 8 wt.% by weight of asphalt binder). The viscosity-temperature, rheological, and low-temperature properties of the modified asphalt binder were evaluated using the Brookfield rotational viscosity test, the dynamic shear rheometer (DSR) test, the bending beam rheometer (BBR) test, and the force ductility test. The results demonstrated that the addition of the ACSW and polyester fiber could improve the anti-deformation and low-temperature properties of the asphalt binders, but reduce their viscosity-temperature properties to some extent. The modified asphalt binder with 11 wt.% ACSW and 8% polyester fiber showed the best anti-deformation property, while the 11 wt.% ACSW and 6 wt.% polyester fiber modified asphalt binder had a better low-temperature performance. The force ductility test was more suitable than the BBR test to characterize the low-temperature properties of the modified asphalt binders. The Fourier-transform infrared spectroscopy (FTIR) and scanning electron microscope (SEM) tests were conducted to study the functional groups and micro-structure of the modified asphalt binders, and the results indicated that no new functional groups were generated and that the interaction between the ACSW, polyester fiber, and asphalt binder was a physical adsorption and interleaving process.

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Improving Environmental Stress Cracking Resistance of High‐Density Polyethylene Grades by Comonomer Addition and Nanocomposite Approach

Mansouri,

Ghasemi Hamedani,

Zou

et al. 2024

Chemistry A European J

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The aim is to determine the effect of polymer density, correlated to the comonomer content, and nanosilica addition on the mechanical and Environmental Stress Cracking Resistance (ESCR) characteristics of high‐density polyethylene (HDPE). In this regard, five HDPE samples with similar Melt Flow Index (MFI) and molar mass but various densities were acquired from a petrochemical plant. Two polymerization reactors work in series and differ only in the amount of 1‐buene comonomer fed to the second reactor. To ascertain the microstructure of the studied samples, GPC and SSA (successive self‐nucleation and annealing) analyses were accomplished. All samples resulted having similar characteristics but slightly various SCB/1000C=7.26‐9.74 (SCB=Short Chain Branching). Consequently, meanwhile studied HDPEs reveal similar notched impact and stress at yield values, the tensile modulus, stress‐at‐break, and elongation‐at‐break tend to demonstrate different results with the SCB content. More significantly, ESCR characteristic varied considerably with SCB/1000C extent, so that higher amount of SCB acknowledged advanced ESCR. Notably, blending HDPE sample containing higher amount of SCB/1000C, with 3 wt.% of chemically modified nanosilica enhanced ESCR characteristic by 40%. DFT (Density Functional Theory) calculations unveiled the role of the comonomer, quantitatively by binding energies and qualitatively by Non Covalent Interaction (NCI) plots.

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Two-dimensional lamellar phosphogypsum/polyethylene glycol composite PCM: Fabrication and characterization

Cited by 7 publications

References 35 publications

Determination and Correlation of Vapor–Liquid Equilibria for the Nitric Acid + Water, Nitric Acid + Water + Phosphoric Acid, and Nitric Acid + Water + Phosphoric Acid + Sulfuric Acid System

Determination and Correlation of Vapor–Liquid Equilibria for the Nitric Acid + Water, Nitric Acid + Water + Phosphoric Acid, and Nitric Acid + Water + Phosphoric Acid + Sulfuric Acid System

Experimental Evaluation of the Properties of Asphalt Binders Modified with Calcium Sulfate Anhydrous Whiskers and Polyester Fibers

Improving Environmental Stress Cracking Resistance of High‐Density Polyethylene Grades by Comonomer Addition and Nanocomposite Approach

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