Study of hydrogen explosion control measures by using <scp>l</scp>-phenylalanine for aluminum wet dust removal systems

Zheng, Xin; Xu, Kaili; Wang, Yantong; Shen, Ruiqing; Wang, Qingsheng

doi:10.1039/c8ra08587k

Cited by 28 publications

(25 citation statements)

References 22 publications

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“…The absorption band at 3440 cm −1 shows the -COOH structure in this material. In addition, the peak in areas 2963 and 1625 cm −1 is related to C-H and C=C, respectively, which indicates the presence of a benzene ring [38]. In the TPP spectrum, the signal at 885 cm −1 is attributed to the stretching vibrations of the P-O-P bond.…”

Section: Synthesis and Characterization Of Cs-phe Npsmentioning

confidence: 97%

Chitosan-Phenylalanine Nanoparticles (Cs-Phe Nps) Extend the Postharvest Life of Persimmon (Diospyros kaki) Fruits under Chilling Stress

Nasr

Pateiro²,

Rabiei

et al. 2021

Coatings

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There are high levels of damage imposed on persimmon fruit postharvest, especially after storing it in cold storage, which causes chilling injury (CI). To reduce this stress on the fruit, the conventional way is to use chemical treatments. Since there is a limitation in the use of chemical materials, it is necessary to apply non-harmful treatments to decrease chilling injury and maintain the quality of persimmon in cold storage. The aim of this study is to investigate the effects of chitosan-loaded phenylalanine nanoparticles (Cs-Phe NPs) (2.5 and 5 mM) on physiochemical and quality factors of persimmon (Diospyros kaki) during 45 days of storage at 4 °C (38 °F) and evaluate the impact of Cs-Phe NPs on the preserving quality in order to reduce the chilling injury of this fruit. The experiment was conducted using a completely randomized design with three replications. Treatments were applied at 15, 30, and 45 days after storage at 4 °C with ≥90% relative humidity. The size of Cs-Phe NPs was less than 100 nm, approximately. The results showed that application of 5 mM of Cs-Phe NPs delayed the negative effects of chilling stress and enhanced antioxidant capacity, firmness, and total soluble solids of persimmon fruit. Lower H2O2 and malonaldehyde (MDA) accumulation along with higher soluble tannin and total carotenoid accumulation in persimmon fruit treated with 5 mM Cs-Phe NPs was also observed. Fruit coated using Cs-Phe NPs in both concentrations (2.5 and 5 mM) showed the highest antioxidant enzyme activity for superoxide dismutase (SOD), catalase (CAT), and ascorbate peroxidase (APX) and the lowest for polyphenol oxidase (PPO) and chilling injury during storage. According to our results, 5 mM of Cs-Phe NPs could be considered as the best treatment under chilling-stress conditions.

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Section: Synthesis and Characterization Of Cs-phe Npsmentioning

confidence: 97%

Chitosan-Phenylalanine Nanoparticles (Cs-Phe Nps) Extend the Postharvest Life of Persimmon (Diospyros kaki) Fruits under Chilling Stress

Nasr

Pateiro²,

Rabiei

et al. 2021

Coatings

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“…Assuming the aluminum dust particles to be spherical [ 2 ], the drag force can be expressed as follows:

where

denotes the relative Reynolds number, defined as

denotes the drag coefficient.…”

Section: Airflow Pattern and Dust Flow Modelingmentioning

confidence: 99%

“…In addition, based on the field measured PM10 dust concentrations and particle mass fraction, dust concentration with particle size larger than 10 μm was calculated. Dust particles (sizes varied between 1–20 μm [ 2 ]) were then ‘released’ from the source in the simulation. Setting of parameters of dust source was shown in Table 3 .…”

Section: Airflow Pattern and Dust Flow Modelingmentioning

confidence: 99%

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CFD Modeling of Ventilation and Dust Flow Behavior in Polishing and the Design of an Innovative Wet Dust Removal System

Qian

Wang

Liu

et al. 2020

IJERPH

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Fine aluminum dust pollution in the polishing process was detected during a field survey. To obtain a fundamental understanding of the airflow patterns and the fine dust dispersion characteristics during a polishing process, computational fluid dynamics simulations were first performed to analyze the data collected in field measurements. The inappropriate ventilation arrangement and lack of effective dust control measures were identified as the main reasons for the high dust exposure levels (in excess of 1000 μg/m3). Simulation results showed that inhalable dust particles (PM10) could be significantly diluted at the operator’s breathing level by adding a supply air inlet above the operating area. Moreover, dry dust collection systems create a risk of aluminum dust explosion accidents. An innovative design of wet dust removal system which could mitigate the occurrence of dust explosions was proposed and then implemented on site. An independent field dust assessment showed that a reduction of fine dust particles up to 95% in the worker’s breathing area and the fine dust in the vents was reduced to 80%. Therefore, the proposed strategies are implemented immediately to address the combustible dust in the polishing working environment and can provide guidance for operators.

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“…CeCl3 also inhibited H2 formation in the wet-dustremoval system [6]. Zheng et al, applied L-phenylalanine, xNa2O•ySiO2, and calcium lignosulfonate to inhibit the Al and water reaction [7][8][9], while Wang et al, and Zhang et al, used sodium D-gluconate [10] and sodium tungstate [11], respectively. These inhibitors are summarized in Table 1.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Inhibition as Explosion Prevention in Wet Metal Dust Removal Systems

et al. 2022

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Hydrogen energy attracts an amount of attention as an environmentally friendly and sustainable energy source. However, hydrogen is also flammable. Hydrogen fires and explosions might occur in wet-dust-removal systems if accumulated aluminum dust reacts with water. Hydrogen inhibition is a safe method to address these issues. For this purpose, we used sodium citrate, a renewable and nontoxic raw material to inhibit H2 formation. Specifically, hydrogen inhibition experiments with sodium citrate were carried out using custom-built equipment developed by our research group. When the concentration of sodium citrate solution was in the range of 0.4–4.0 g/L, a protective coating was formed on the surface of the Al particles, which prevented them from contacting with water. The inhibitory effect was achieved when the concentration of sodium citrate was in a certain range, and too much or too little addition may reduce the inhibitory effect. In this paper, we also discuss the economic aspects of H2 inhibition with this method because it offers excellent safety advantages and could be incorporated on a large scale. Such an intrinsic safety design of H2 inhibition to control explosions in wet-dust-removal systems could be applied to ensure the safety of other systems, such as nuclear reactors.

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Study of hydrogen explosion control measures by using l-phenylalanine for aluminum wet dust removal systems

Abstract: The reaction between aluminium dust and water in wet dust removal system is inhibited by using l-phenylalanine.

Cited by 28 publications

References 22 publications

Chitosan-Phenylalanine Nanoparticles (Cs-Phe Nps) Extend the Postharvest Life of Persimmon (Diospyros kaki) Fruits under Chilling Stress

Chitosan-Phenylalanine Nanoparticles (Cs-Phe Nps) Extend the Postharvest Life of Persimmon (Diospyros kaki) Fruits under Chilling Stress

CFD Modeling of Ventilation and Dust Flow Behavior in Polishing and the Design of an Innovative Wet Dust Removal System

Hydrogen Inhibition as Explosion Prevention in Wet Metal Dust Removal Systems

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