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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.

Original languageEnglish
Article number2763
Number of pages13
JournalInternational Journal of Molecular Sciences
Volume23
Issue number5
DOIs
StatePublished - 1 Mar 2022

    Research areas

  • 3D printing, Acetylene, Calcium carbide, Energy economy, Energy saving, Molecular reactions, Thermal mapping, ACETYLENE, GAS GENERATION, EX-SITU GENERATION, energy saving, calcium carbide, thermal mapping, CAC2, CARBONYLATION, molecular reactions, energy economy, MECHANOCHEMICAL REACTION, acetylene

    Scopus subject areas

  • Molecular Biology
  • Spectroscopy
  • Catalysis
  • Inorganic Chemistry
  • Computer Science Applications
  • Physical and Theoretical Chemistry
  • Organic Chemistry

ID: 93100456