Valorization of iron (II) oxalate dihydrate coming from pickling processes through thermal conversion

Emiliano Salucci; Antonio d'Angelo; Antonio Fabozzi; Osvalda Senneca; Francesco Bellucci; Rosa Francesca; Henrik Grénman; Henrik Saxén; Martino Di Serio; Vincenzo Russo

doi:10.3390/ma17184630

Valorization of iron (II) oxalate dihydrate coming from pickling processes through thermal conversion

Emiliano Salucci, Antonio d'Angelo, Antonio Fabozzi, Osvalda Senneca, Francesco Bellucci, Rosa Francesca, Henrik Grénman, Henrik Saxén, Martino Di Serio, Vincenzo Russo^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › Scientific › peer-review

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Abstract

The valorization of industrial byproducts is an emerging practice that aims to transform waste materials generated during production processes into valuable resources. In this work, a preliminary study was carried out on the thermal conversion of an industrial solid byproduct resulting from the pickling of metal surfaces, mainly containing iron (II) oxalate. In a fixed-bed reactor, the thermal conversion was investigated as a function of the operating temperature and overall time. The starting material and the products obtained after heat treatment were characterized in detail, using numerous qualitative and semi-quantitative techniques. The aim of this research was to determine the optimal operating conditions for the transformation of the industrial byproduct into a high-quality product. By varying the operating conditions, it was found that complete conversion of iron (II) oxalate to magnetite was achieved at high temperatures (i.e., 773 K and 873 K) after one hour of treatment. The resulting product had a low degree of crystallization, which increased slightly with an increasing reaction time at a temperature of 873 K, reaching a maximum of about 11%. The magnetite obtained can be used in the future as a starting material for chemical looping processes as a chemical/energy carrier for the production of hydrogen.

Original language	English
Article number	4630
Number of pages	11
Journal	Materials
Volume	17
Issue number	18
DOIs	https://doi.org/10.3390/ma17184630
Publication status	Published - 21 Sept 2024
MoE publication type	A1 Journal article-refereed

Funding

Irpinia Zinco and CRdC are acknowledged for the financial support given to conduct this study. Antonio Fabozzi acknowledges the funding from the European Union\u2013NextGenerationEU under the National Recovery and Resilience Plan (PNRR), Mission 04 Component 2 Investment 3.1, Project \u201CECCSELLENT\u2013Development of ECCSEL-R.I. ItaLian facilities: usEr access, services and loNg-Term sustainability\u201D Code: IR0000020\u2013CUP F53C22000560006. iENTRANCE@ENL\u2013Infrastructure for ENergy TRAnsition aNd Circular Economy @ EuroNanoLab\u201D\u2013Code IR0000027\u2013CUP B33C22000710006 \u2013European Union\u2013NextGenerationEU under the National Recovery and Resilience Plan (NRRP), Mission 04, Component 2, Investment 3.1. The authors acknowledge Luigi Stanzione, Andrea Capuozzo, and Claudia Basco for the XRF analysis and Aniello Ferrara for the experimental support.

Keywords

Iron (II) oxalate
thermal treatment
circular economy

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.3390/ma17184630

materials-17-04630Final published version, 2.62 MBLicence: CC BY

https://urn.fi/URN:NBN:fi-fe2024111190611

Cite this

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title = "Valorization of iron (II) oxalate dihydrate coming from pickling processes through thermal conversion",

abstract = "The valorization of industrial byproducts is an emerging practice that aims to transform waste materials generated during production processes into valuable resources. In this work, a preliminary study was carried out on the thermal conversion of an industrial solid byproduct resulting from the pickling of metal surfaces, mainly containing iron (II) oxalate. In a fixed-bed reactor, the thermal conversion was investigated as a function of the operating temperature and overall time. The starting material and the products obtained after heat treatment were characterized in detail, using numerous qualitative and semi-quantitative techniques. The aim of this research was to determine the optimal operating conditions for the transformation of the industrial byproduct into a high-quality product. By varying the operating conditions, it was found that complete conversion of iron (II) oxalate to magnetite was achieved at high temperatures (i.e., 773 K and 873 K) after one hour of treatment. The resulting product had a low degree of crystallization, which increased slightly with an increasing reaction time at a temperature of 873 K, reaching a maximum of about 11\%. The magnetite obtained can be used in the future as a starting material for chemical looping processes as a chemical/energy carrier for the production of hydrogen.",

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AU - Salucci, Emiliano

AU - d'Angelo, Antonio

AU - Fabozzi, Antonio

AU - Senneca, Osvalda

AU - Bellucci, Francesco

AU - Francesca, Rosa

AU - Grénman, Henrik

AU - Saxén, Henrik

AU - Di Serio, Martino

AU - Russo, Vincenzo

PY - 2024/9/21

Y1 - 2024/9/21

N2 - The valorization of industrial byproducts is an emerging practice that aims to transform waste materials generated during production processes into valuable resources. In this work, a preliminary study was carried out on the thermal conversion of an industrial solid byproduct resulting from the pickling of metal surfaces, mainly containing iron (II) oxalate. In a fixed-bed reactor, the thermal conversion was investigated as a function of the operating temperature and overall time. The starting material and the products obtained after heat treatment were characterized in detail, using numerous qualitative and semi-quantitative techniques. The aim of this research was to determine the optimal operating conditions for the transformation of the industrial byproduct into a high-quality product. By varying the operating conditions, it was found that complete conversion of iron (II) oxalate to magnetite was achieved at high temperatures (i.e., 773 K and 873 K) after one hour of treatment. The resulting product had a low degree of crystallization, which increased slightly with an increasing reaction time at a temperature of 873 K, reaching a maximum of about 11%. The magnetite obtained can be used in the future as a starting material for chemical looping processes as a chemical/energy carrier for the production of hydrogen.

AB - The valorization of industrial byproducts is an emerging practice that aims to transform waste materials generated during production processes into valuable resources. In this work, a preliminary study was carried out on the thermal conversion of an industrial solid byproduct resulting from the pickling of metal surfaces, mainly containing iron (II) oxalate. In a fixed-bed reactor, the thermal conversion was investigated as a function of the operating temperature and overall time. The starting material and the products obtained after heat treatment were characterized in detail, using numerous qualitative and semi-quantitative techniques. The aim of this research was to determine the optimal operating conditions for the transformation of the industrial byproduct into a high-quality product. By varying the operating conditions, it was found that complete conversion of iron (II) oxalate to magnetite was achieved at high temperatures (i.e., 773 K and 873 K) after one hour of treatment. The resulting product had a low degree of crystallization, which increased slightly with an increasing reaction time at a temperature of 873 K, reaching a maximum of about 11%. The magnetite obtained can be used in the future as a starting material for chemical looping processes as a chemical/energy carrier for the production of hydrogen.

KW - Iron (II) oxalate

KW - thermal treatment

KW - circular economy

U2 - 10.3390/ma17184630

DO - 10.3390/ma17184630

M3 - Article

SN - 1996-1944

VL - 17

JO - Materials

JF - Materials

IS - 18

M1 - 4630

ER -

Valorization of iron (II) oxalate dihydrate coming from pickling processes through thermal conversion

Abstract

Funding

Keywords

UN SDGs

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