Authors:E. Bevers, P. van Ekeren, W. Haije, and H. Oonk
absorption by and desorption from lithium chloride at different pressures
has been studied using high-pressure differential scanning calorimetry, for
application in a high-lift high temperature chemical heat pump. The measurements
were performed under isobaric as well as under isothermal circumstances. Clausius–Clapeyron
plots were constructed and used to calculate the thermodynamic parameters
and to determine the stability regions of the different complexes. Controversies
in literature as to the real existing phases are resolved.
The chemical behavior of positive muons in condensed phase ammonia has been investigated in order to elucidate the phase and temperature effects on the chemical and physical behavior of the muon and muonium formation in a simple binary compound. Diamagnetic muon yield (PD) was constant at 0.67±0.01 in both solid and liquid above 125 K. Muonium formation in solids were observed above 100 K with slow muonium spin relaxation. In liquids, the muonium yield and its spin relaxation rate showed temperature dependence. Addition of metallic sodium increased PD in liquids.
stationary sources, the selective catalytic reduction of NO x by ammonia is considered nowadays the best available technology, being able to reduce NO x emissions at ppm levels [ 1 ]. Among the large number of catalysts active in the SCR of NO by NH 3 , V 2
Authors:B. Hunger, J. Hoffmann, O. Heitzsch, and M. Hunger
The temperature-programmed desorption (tpd) of the amount of ammonia which is preadsorbed at about 373 K at HZSM-5 zeolites yields a complex desorption curve consisting of two overlapped peaks (Β andγ peak). Parts of the ammonia desorbed can be attributed to SiOHAl groups considering also1H-MAS NMR measurements.