Well-ordered Cs–Ru/@SBA-15 nanocomposite materials for low pressure ammonia synthesis

An active and durable Ru-based catalyst using an inert support such as SBA-15 for low pressure ammonia synthesis can be prepared, where the Cs-promoted Ru active sites are delicately built in the nanospace.

Application of Selected Method for Assessment of Self-Heating of Vegetable Oils

One of the groups of materials that tend to self-combustion is vegetable oils. The amount of used oil used is currently increasing and thus the hazard of fires increases. For this reason, it is important to evaluate the tendency of oils for self-heating to minimize self-combustion. This article deals with assessment of the tendency of vegetable oils to self-combustion using two methods: Differential Mackey test and the method of thermal analysis. These methods evaluate the behaviour of oils during their heating. Thermal analysis using the Mettler-Toledo device was performed for oils without support and oils applied on the inert support. It was found that both methods are suitable for evaluation of the exothermic effect that occurs during oxidation of oils after their application on the solid supports. The obtained results of the analyses are the basis for mutual comparison of both way of measurement. Interpretation of these results is a contribution to increasing of safety during using oils.

Effect of calcium precursors on pelletized property and cyclic CO2 capture performance

CaO is widely used for capturing CO2 in large scale application however the work on the manufacture of CaO based pellets for the application of CO2 capture is relatively limited. In this research investigated the effect of calcium precursors (Ca(OH)2, Ca(NO3)2 and Ca(CH3COO)2) and their synthesis method (sol-mixing and wet-mixing) on pelletization. Adsorbent synthesized from Ca(CH3COO)2 as a precursor using sol-mixing pelletize to porous spherical provide the best mechanical strength and CO2 adsorption capacity 0.51 and 0.41 g CO2/ g CaO at first cycle and tenth cycle respectively. The outstanding cyclic performance of Ca(CH3COO)2 sol-mixing can be ascribed to the presence of inert support material i.e. Ca9Al6O18 and Ca12Al14O33 with suitable pore volume to prevent sintering of CaO and structure collapsing at high temperature.