Calorimetric Monitoring of Exothermic Reactions by Distributed Acoustic Sensing

Yannik Schick; Guilherme Heim Weber; Robin Hohensinn; Danilo Fernandes Gomes; Cicero Martelli; Mark Hlawitschka; Marco Da Silva

doi:10.1109/LSENS.2025.3606119

Calorimetric Monitoring of Exothermic Reactions by Distributed Acoustic Sensing

Yannik Schick^*, Guilherme Heim Weber, Robin Hohensinn, Danilo Fernandes Gomes, Cicero Martelli, Mark Hlawitschka, Marco Da Silva

^*Corresponding author for this work

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

Abstract

This Letter demonstrates the potential of low-frequency Distributed Acoustic Sensing (LF-DAS) for calorimetric monitoring of chemical reactions. Using 2-propanol-water mixing as an exothermic model reaction, we employ ø-OTDR DAS system to quantify heat release with spatio-temporal resolution. The fiber-optic system captures thermally induced phase shifts of the narrowband laser, enabling quantitative heat release analysis with high agreement to theory. The presented calibration enables relating optical phase changes to temperature variation. Experimental results show the DAS system's ability to identify thermal hotspots and provide real-time insights into reaction dynamics. This work addresses key challenges in hotspot detection, introduces a novel approach for safe, efficient process control, and highlights the potential of LF-DAS for advanced calorimetric monitoring of large-scale exothermic (reactor) systems.

Original language	English
Article number	5000804
Number of pages	4
Journal	IEEE Sensors Letters
Volume	9
Issue number	10
DOIs	https://doi.org/10.1109/LSENS.2025.3606119
Publication status	Published - 10 Oct 2025

Fields of science

202012 Electrical measurement technology
102003 Image processing
202016 Electrical engineering
202015 Electronics
202027 Mechatronics
103021 Optics
202 Electrical Engineering, Electronics, Information Engineering
202024 Laser technology
202037 Signal processing
202036 Sensor systems
203016 Measurement engineering
204003 Chemical process engineering
204002 Chemical reaction engineering
207111 Environmental engineering
203024 Thermodynamics
204 Chemical Process Engineering
104028 Per- and polyfluoroalkyl substances (PFAS)

JKU Focus areas

Digital Transformation
Sustainable Development: Responsible Technologies and Management

Access to Document

10.1109/LSENS.2025.3606119

Cite this

@article{4ecd24cf7f124c62b597697d99095773,

title = "Calorimetric Monitoring of Exothermic Reactions by Distributed Acoustic Sensing",

abstract = "This Letter demonstrates the potential of low-frequency Distributed Acoustic Sensing (LF-DAS) for calorimetric monitoring of chemical reactions. Using 2-propanol-water mixing as an exothermic model reaction, we employ {\o}-OTDR DAS system to quantify heat release with spatio-temporal resolution. The fiber-optic system captures thermally induced phase shifts of the narrowband laser, enabling quantitative heat release analysis with high agreement to theory. The presented calibration enables relating optical phase changes to temperature variation. Experimental results show the DAS system's ability to identify thermal hotspots and provide real-time insights into reaction dynamics. This work addresses key challenges in hotspot detection, introduces a novel approach for safe, efficient process control, and highlights the potential of LF-DAS for advanced calorimetric monitoring of large-scale exothermic (reactor) systems.",

author = "Yannik Schick and \{Heim Weber\}, Guilherme and Robin Hohensinn and \{Fernandes Gomes\}, Danilo and Cicero Martelli and Mark Hlawitschka and \{Da Silva\}, Marco",

year = "2025",

month = oct,

day = "10",

doi = "10.1109/LSENS.2025.3606119",

language = "English",

volume = "9",

journal = "IEEE Sensors Letters",

issn = "2475-1472",

publisher = "IEEE",

number = "10",

}

TY - JOUR

T1 - Calorimetric Monitoring of Exothermic Reactions by Distributed Acoustic Sensing

AU - Schick, Yannik

AU - Heim Weber, Guilherme

AU - Hohensinn, Robin

AU - Fernandes Gomes, Danilo

AU - Martelli, Cicero

AU - Hlawitschka, Mark

AU - Da Silva, Marco

PY - 2025/10/10

Y1 - 2025/10/10

N2 - This Letter demonstrates the potential of low-frequency Distributed Acoustic Sensing (LF-DAS) for calorimetric monitoring of chemical reactions. Using 2-propanol-water mixing as an exothermic model reaction, we employ ø-OTDR DAS system to quantify heat release with spatio-temporal resolution. The fiber-optic system captures thermally induced phase shifts of the narrowband laser, enabling quantitative heat release analysis with high agreement to theory. The presented calibration enables relating optical phase changes to temperature variation. Experimental results show the DAS system's ability to identify thermal hotspots and provide real-time insights into reaction dynamics. This work addresses key challenges in hotspot detection, introduces a novel approach for safe, efficient process control, and highlights the potential of LF-DAS for advanced calorimetric monitoring of large-scale exothermic (reactor) systems.

AB - This Letter demonstrates the potential of low-frequency Distributed Acoustic Sensing (LF-DAS) for calorimetric monitoring of chemical reactions. Using 2-propanol-water mixing as an exothermic model reaction, we employ ø-OTDR DAS system to quantify heat release with spatio-temporal resolution. The fiber-optic system captures thermally induced phase shifts of the narrowband laser, enabling quantitative heat release analysis with high agreement to theory. The presented calibration enables relating optical phase changes to temperature variation. Experimental results show the DAS system's ability to identify thermal hotspots and provide real-time insights into reaction dynamics. This work addresses key challenges in hotspot detection, introduces a novel approach for safe, efficient process control, and highlights the potential of LF-DAS for advanced calorimetric monitoring of large-scale exothermic (reactor) systems.

UR - https://www.scopus.com/pages/publications/105015100008

U2 - 10.1109/LSENS.2025.3606119

DO - 10.1109/LSENS.2025.3606119

M3 - Article

SN - 2475-1472

VL - 9

JO - IEEE Sensors Letters

JF - IEEE Sensors Letters

IS - 10

M1 - 5000804

ER -

Calorimetric Monitoring of Exothermic Reactions by Distributed Acoustic Sensing

Abstract

Fields of science

JKU Focus areas

Access to Document

Other files and links

Development of a Combined Optical Fiber Distributed Temperature Sensing System using Raman and Rayleigh Scattering

Cite this