A batch biotransformation process running in the presence of microorganisms cells revealing a specified enzyme activity has been considered. The parallel deactivation of enzyme has been taken into account. An analytical solution determining the process course under isothermal conditions and at an optimal temperature profile has been presented. The advantages resulting from the application of th...

A method for extracting the parameters describing the process of grain growth from calorimetric data is presented. Both isothermal and scanning experiments are considered. It is demonstrated that the Kissinger method used for determining the activation enthalpy of a nucleation-and-growth process can be used for a grain growth process as well. Characteristic differences between the signals, both...

The main calorimetric principles used in isothermal microcalorimetry are briefly discussed. Different chemical calibration and test reactions are discussed, with a focus on reactions suitable for ambient conditions: reactions initiated by mixing of liquids (including titration microcalorimetry), dissolution of solid compounds and of slightly soluble gases, a photochemical process, and thermal p...

The possibility of producing chemical fuel (hydrogen) from the solar-thermal energy input using an isothermal cycling strategy is explored. The canonical thermochemical reactive oxide, ceria, is reduced under high temperature and inert sweep gas, and in the second step oxidized by H2O at the same temperature. The process takes advantage of the oxygen chemical potential difference between the in...

The thermal behavior of two polymorphic forms of rifampicin was studied by DSC and TG/DTG. The thermoanalytical results clearly showed the differences between the two crystalline forms. Polymorph I was the most thermally stable form, the DSC curve showed no fusion for this species and the thermal decomposition process occurred around 245 °C. The DSC curve of polymorph II showed two consecutive ...

the growing scarcity of fresh water is driving the implementation of wastewater treatment and water reuse on an increasingly large scale. various methods have been developed and used for water reuse from wastewater; however, the membrane distillation (md) process, as a promising separation technology, has recently gained more attention. the md process is a non-isothermal membrane-based separati...

Manufacturing High Aspect Ratio Microturbine by Isothermal Microforging Process Chunju Wang a b c , Chuanjie Wang a b , Debin Shan a b c , Bin Guo a b c & Jie Xu c a National Key Laboratory for Precision Hot Processing of Metals , Harbin , China b School of Materials Science and Engineering , Harbin Institute of Technology , Harbin , China c Key Laboratory of Micro-Systems and Micro-Structures ...

This paper proposes a new MINLP model for heat exchanger network synthesis that includes streams with phase change. The model considers every possible combination of process streams that may arise within a chemical process: streams with sensible heat, streams with latent heat, and streams with both latent and sensible heat. As part of the optimization strategy, the superstructure is modeled wit...

The effect of annealing cycle on regeneration efficiency was investigated through isothermal treatments between 700 and 1000°C. We determined an inverse relationship between the recovery rate of the peak reflectivity and temperature. A regeneration efficiency of 85.2% and long-term stability at 1000°C for 500 hours were achieved via a slow regeneration process. Thermal sensors developed by isot...