TY - JOUR

T1 - Thermal Mapping of Self-Promoted Calcium Carbide Reactions for Performing Energy-Economic Processes

AU - Родыгин, Константин Сергеевич

AU - Лоцман, Кристина Александровна

AU - Ерохин, Кирилл

AU - Корабельникова, Виктория

AU - Анаников, Валентин Павлович

N1 - Publisher Copyright: © 2022 by the authors. Licensee MDPI, Basel, Switzerland.

PY - 2022/3/1

Y1 - 2022/3/1

N2 - The syntheses of various chemical compounds require heating. The intrinsic release of heat in exothermic processes is a valuable heat source that is not effectively used in many reactions. In this work, we assessed the released heat during the hydrolysis of an energy-rich compound, calcium car-bide, and explored the possibility of its usage. Temperature profiles of carbide hydrolysis were rec-orded, and it was found that the heat release depended on the cosolvent and water/solvent ratio. Thus, the release of heat can be controlled and adjusted. To monitor the released heat, a special tube-in-tube reactor was assembled using joining part 3D-printed with nylon. The thermal effect of the reaction was estimated using a thermoimaging IR monitor. It was found that the kinetics of heat release are different when using mixtures of water with different solvents, and the maximum achieva-ble temperature depends on the type of solvent and the amount of water and carbide. The possibility of using the heat released during carbide hydrolysis to initiate a chemical reaction was tested using a hydrothiolation reaction—the nucleophilic addition of thiols to acetylene. In a model experiment, the yield of the desired product with the use of heat from carbide hydrolysis was 89%, compared to 30% in this intrinsic heating, which was neglected.

AB - The syntheses of various chemical compounds require heating. The intrinsic release of heat in exothermic processes is a valuable heat source that is not effectively used in many reactions. In this work, we assessed the released heat during the hydrolysis of an energy-rich compound, calcium car-bide, and explored the possibility of its usage. Temperature profiles of carbide hydrolysis were rec-orded, and it was found that the heat release depended on the cosolvent and water/solvent ratio. Thus, the release of heat can be controlled and adjusted. To monitor the released heat, a special tube-in-tube reactor was assembled using joining part 3D-printed with nylon. The thermal effect of the reaction was estimated using a thermoimaging IR monitor. It was found that the kinetics of heat release are different when using mixtures of water with different solvents, and the maximum achieva-ble temperature depends on the type of solvent and the amount of water and carbide. The possibility of using the heat released during carbide hydrolysis to initiate a chemical reaction was tested using a hydrothiolation reaction—the nucleophilic addition of thiols to acetylene. In a model experiment, the yield of the desired product with the use of heat from carbide hydrolysis was 89%, compared to 30% in this intrinsic heating, which was neglected.

KW - 3D printing

KW - Acetylene

KW - Calcium carbide

KW - Energy economy

KW - Energy saving

KW - Molecular reactions

KW - Thermal mapping

KW - ACETYLENE

KW - GAS GENERATION

KW - EX-SITU GENERATION

KW - energy saving

KW - calcium carbide

KW - thermal mapping

KW - CAC2

KW - CARBONYLATION

KW - molecular reactions

KW - energy economy

KW - MECHANOCHEMICAL REACTION

KW - acetylene

UR - http://www.scopus.com/inward/record.url?scp=85125375954&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/4ee169fd-1ba8-32b3-90bb-228c4d5e2d81/

U2 - 10.3390/ijms23052763

DO - 10.3390/ijms23052763

M3 - Article

C2 - 35269903

VL - 23

JO - International Journal of Molecular Sciences

JF - International Journal of Molecular Sciences

SN - 1422-0067

IS - 5

M1 - 2763

ER -