The influence of the additives of expired paracetamol (PR) and naproxen (NP) on the thermal behaviour of high volatile bituminous coal (HVBC) and the composition of material extracted from the zones of its plastic layer

Zubkova, Valentina; Strojwas, Andrzej J.; Kaniewski, M.; Jany, Benedykt R.

doi:10.1016/j.fuel.2020.117752

Cited by 4 publications

(3 citation statements)

References 74 publications

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“…The amount of additives was 2 wt.%. The previous studies on solid hydrocarbon feedstocks [26,27] showed that the direction of changes taking place in material during thermochemical treatment can be observed from the amount of 2 wt% of additive. PH sample and its blends with additives were densified to the form of tablets.…”

Section: Methodsmentioning

confidence: 99%

An Analysis of the Influence of Low Density Polyethylene, Novolac, and Coal Tar Pitch Additives on the Decrease in Content of Impurities Emitted from Densified Pea Husks during the Process of Their Pyrolysis

2023

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The course of pyrolysis of pea husks was studied. It was stated that the compaction of a sample during its pyrolysis causes an almost two-fold increase in the content of hydrocarbons in the composition of volatile products in the temperature range of 350–470 °C. Low density polyethylene (LDPE), novolac, and coal tar pitch (CTP) wastes were added to feedstocks in the amount of 2 wt% in order to decrease the contribution of saturated and unsaturated hydrocarbons along with oxygen-containing compounds in volatile products. The analysis of the obtained products of pyrolysis was conducted using the techniques of thermogravimetry/Fourier transform infrared spectroscopy (TG/FT-IR), attenuated total reflectance (ATR) and ultraviolet (UV)-spectroscopies, gas chromatography-mass spectrometry (GCMS), X-ray diffractions (XRD), scanning electron microscopy (SEM), and energy dispersive X-ray analysis (EDX). It was determined that pitch took the first place in a series of effectiveness in decreasing the content of harmful compounds in pyrolysis products; novolac was the second. A temperature of 370 °C (CTP) lowers the contribution of compounds with carbonyl groups (by approx. 2.7 times) and the contribution of alcohols, phenols, and esters (by approx. 4.4 times). At a temperature of 465 °C, this additive reduces the contribution of saturated and unsaturated hydrocarbons in the composition of volatiles (by approx. 5.8 times) and at a temperature of 520 °C, a more substantial decrease is observed (by approx. 14.3 times). During the pyrolysis in the temperature range of 420–520 °C, LDPE actively emits its own products of decomposition in the form of aliphatic hydrocarbons that negatively affect the environment. The composition of condensed pyrolysis products changes under the influence of additives. In water condensates, the concentration of determined phenols and anhydrosugars increases slightly under the influence of additives. The SEM and XRD investigations proved that inorganics interact with volatile pyrolysis products from the blends of pea husks with additives and change their composition. After the transformation of chemical composition, inorganics catalyse secondary reactions that take place in the pyrolysis products of blends.

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Section: Methodsmentioning

confidence: 99%

An Analysis of the Influence of Low Density Polyethylene, Novolac, and Coal Tar Pitch Additives on the Decrease in Content of Impurities Emitted from Densified Pea Husks during the Process of Their Pyrolysis

2023

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“…The pharmaceuticals used in the research undergo active thermal decomposition at the temperature of about 250 • C [17]. The structures of NP and PR contain rings and functional groups (Figure S1) similar to those occurring in biomass structure and in products of its decomposition.…”

Section: Research Objectsmentioning

confidence: 99%

“…Pharmaceuticals such as paracetamol and naproxen undergo active thermal decomposition at a temperature lower than that of the active decomposition of biomass [17]. Hence, the products of their decomposition can directly influence the course of biomass decomposition and, in this way, actively change such course.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Addition of Expired Pharmaceuticals on Thermal Behaviour of Selected Types of Biomass

Strojwas,

Zubkova,

Banas

et al. 2024

Energies

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The influence of 2 wt.% additives of expired paracetamol and naproxen on the thermal behaviour of densified samples of pea husks (PH), corncobs (CC), and sunflower inflorescences (SI) was studied using an analytical TG/FTIR unit. Gaseous, liquid, and solid pyrolysis products were evaluated using XRD, SEM, and EDX techniques along with FT-IR, ATR, and UV spectroscopies. It was found that the additives changed the yield and composition of pyrolysis products differently. The addition of paracetamol increases the contribution of guaiacyl rings in the condensed material of all samples, and the addition of naproxen—that of chromophores originating from the decomposition of lignin. The additives diversely affected the contribution of hydrocarbons in the composition of volatile products of pyrolysis: they decreased this contribution in PH samples, increased it in SI samples, and did not change in CC samples. The additives used changed the morphology and composition of organic and inorganic parts of pyrolyzed biomass. These changes in inorganics caused the changes in the composition of pyrolysis products. The conducted research proves not only the possibility of the utilization of expired pharmaceuticals during their pyrolysis with densified PH and CC samples but also the ability to reduce the undesirable hydrocarbons in the obtained volatile products.

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A low-cost and multifunctional bluecoke-based absorbent for high-efficiency microwave pyrolysis of coal

Reddy

et al. 2022

Fuel

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The influence of the additives of expired paracetamol (PR) and naproxen (NP) on the thermal behaviour of high volatile bituminous coal (HVBC) and the composition of material extracted from the zones of its plastic layer

Cited by 4 publications

References 74 publications

An Analysis of the Influence of Low Density Polyethylene, Novolac, and Coal Tar Pitch Additives on the Decrease in Content of Impurities Emitted from Densified Pea Husks during the Process of Their Pyrolysis

An Analysis of the Influence of Low Density Polyethylene, Novolac, and Coal Tar Pitch Additives on the Decrease in Content of Impurities Emitted from Densified Pea Husks during the Process of Their Pyrolysis

The Influence of Addition of Expired Pharmaceuticals on Thermal Behaviour of Selected Types of Biomass

A low-cost and multifunctional bluecoke-based absorbent for high-efficiency microwave pyrolysis of coal

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