Preparation and performance of environmental friendly Sulphur-Free propellant for fireworks

Sun, Yue; Han, Zhiyue; Du, Zhiming; Zeng-yi, LI; Cong, Xiaomin

doi:10.1016/j.applthermaleng.2017.08.003

Cited by 23 publications

(4 citation statements)

References 13 publications

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“…The binder weighed 3% of the total formula weight and was dissolved in a small amount of absolute ethyl alcohol. After it was completely dissolved, the binder was added drop by drop to the mixture of pyrotechnics, mixed evenly, subject to extruding granulation with an 8-mesh screen, and then dried at 50 °C. , …”

Section: Methodsmentioning

confidence: 99%

New Green Bio-Based Binder to Reduce the Poisonous and Harmful Gases Generated from the Combustion of Pyrotechnics

Han

Deng

et al. 2022

ACS Sustainable Chem. Eng.

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The combustion of pyrotechnics is typically fast and incomplete, resulting in air pollutants such as particulate matters (PM) and poisonous, harmful gases. Demands for environment-friendly pyrotechnics that can be applied at a low temperature with a controllable combustion rate are ever-growing. The study used bio-based dibutyl itaconate (DBI) as the reactive monomer for self-polymerization to prepare poly-dibutyl itaconate (PDIB) with a molecular weight of 5307 g/mol. The molecular structure and thermal stability of PDIB were measured and analyzed. Serving as binders, PDIB and phenolic resin (PF) were, respectively, mixed with CH 3 N 5 (5-AT) and KNO 3 to prepare a pyrotechnic formulation. The final products were tested and compared in terms of their safety, mechanical, combustion, and environment-friendly performances. The results showed that the PDIB binder pyrotechnics is featured with a slower complete combustion, a large amount of gases produced, a small amount of combustion residues, a low PM2.5 concentration, and environmentally friendly flue gases. These prove that PDIB can be used as a new environmentally friendly binder for pyrotechnics. In addition, this study discovered the "string bag" theory of the pyrotechnic binder, which implies that the monomer structure of the binder and the ignition point of the polymer are the key to determine the combustion rate of pyrotechnics.

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Section: Methodsmentioning

confidence: 99%

New Green Bio-Based Binder to Reduce the Poisonous and Harmful Gases Generated from the Combustion of Pyrotechnics

Han

Deng

et al. 2022

ACS Sustainable Chem. Eng.

Self Cite

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“…In the production process of finished products, semi-finished products, and raw materials, fireworks have flammable and explosive characteristics. Therefore, the production process can easily lead to fire and explosion accidents [3].…”

Section: Introductionmentioning

confidence: 99%

Thermal Stability Evaluation of T152 Emulsifier on the Modification Influence of Fireworks Propellant

Yang

Tang

et al. 2022

Processes

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High-energy substances like effect propellant and propellant are used in fireworks. In the process of manufacture, transportation, and use, heat can easily get out of control. The emulsifier polyisobutene succinimide (T152) is frequently used to emulsify explosives. Given the thermal safety of the propellant in fireworks, this paper used the emulsifier T152 to emulsify the propellant. Thermogravimetric Fourier-transform infrared spectrometry and differential scanning calorimetry were used to analyze and test the propellant. In addition, several methods of thermokinetic calculation were used to calculate thermal stability. The thermal stability of the propellant before and after adding T152 was compared and analyzed. The test results indicate that the apparent activation energy of the propellant increases with the addition of T152. The emulsifier improved the thermal stability of the propellant. The research results can provide relevant data and suggestions for the thermal reaction of pyrotechnic propellants, thereby reducing the potential risks of the fireworks industry.

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“…There are different techniques that can be used to achieve the goal of reducing pollution, resulting in different kinds of fireworks or charges of fireworks, such as sulfur-free propellant charge, 13 smokeless fireworks, 14 and strontium-and chlorinefree illuminating pyrotechnics. 15 The performance of these charges or fireworks can be experimentally tested, and the potential benefits may be estimated.…”

Section: Introductionmentioning

confidence: 99%

“…Each type of firework has three types of charges: pyrotechnic charge (star), unpacking (burst) charge, and propellant (lift) charge (Figure S1). 13 To determine the amount of emissions, we need to know the masses of charges and the emission factors for these charges.…”

Section: Introductionmentioning

confidence: 99%

Are Environmentally Friendly Fireworks Really “Green” for Air Quality? A Study from the 2019 National Day Fireworks Display in Shenzhen

Fan

Liu

2021

Environ. Sci. Technol.

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Fireworks are widely used around the world and can cause severe air pollution over a short period of time. Many efforts have been carried out worldwide to reduce the level of firework-generated air pollution, such as limiting the use of fireworks and developing environmentally friendly fireworks. Research has suggested that the use of environmentally friendly charges in fireworks can reduce emissions, although their impact on ambient air quality has not been quantified. Here, we used a chemical transport model to study the benefits of environmentally friendly fireworks in reducing ambient PM2.5 based on a detailed estimation of emissions from fireworks and dense observations available for simulation validation. Our results showed that environmentally friendly fireworks can reduce ambient PM2.5 by ∼50% (in the range of 15–65% with a “central” value of 35% considering uncertainties) compared with traditional fireworks. However, due to a large number of fireworks used, the air quality still significantly deteriorated, and the effect of using twice the amount of environmentally friendly fireworks on air quality would be comparable to the use of traditional fireworks. Our results indicate that environmentally friendly fireworks are not actually “green”. To make them green, the total number of fireworks used at one time must be strictly restricted.

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Preparation and performance of environmental friendly Sulphur-Free propellant for fireworks

Cited by 23 publications

References 13 publications

New Green Bio-Based Binder to Reduce the Poisonous and Harmful Gases Generated from the Combustion of Pyrotechnics

New Green Bio-Based Binder to Reduce the Poisonous and Harmful Gases Generated from the Combustion of Pyrotechnics

Thermal Stability Evaluation of T152 Emulsifier on the Modification Influence of Fireworks Propellant

Are Environmentally Friendly Fireworks Really “Green” for Air Quality? A Study from the 2019 National Day Fireworks Display in Shenzhen

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