Investigation of a Gas-Solid Separation Process for Cement Raw Meal

AbstractThe gas/solid heat exchanger (2D-HX), developed to replace the cyclone preheaters in cement plants is presented. This design aims at reducing construction height and operation costs. The separation process in the 2D-HX is experimentally investigated, and the results show that separation efficiencies up to 90% can be achieved in the gravitationally driven process. Based on the data, a model of the separation process is developed, utilizing relations from pneumatic transport and cyclone theory. The model fit is acceptable, especially in the area of interest. Based on experimental data, further development of the technology is encouraged

Selective N-terminal acylation of peptides and proteins with a Gly-His tag sequence

His-tagged proteins can undergo N-terminal acylation as an undesired side-reaction. Here, the authors utilize this to develop a method for highly selective acylation and further modification of peptides and proteins using an optimized His sequence and 4-methoxyphenyl esters as acyl donors