Addition of water or methanol in optimum amounts significantly reduced the coke content of spent catalysts.
Table 8 Coke content of spent catalysts from TGA T (°C) Oxygenated additive Wt% coke of catalyst 620 0.1 ml/h methanol 4.2 620 0.5 ml/h water 3.8 620 Non 8.0 600 0.05 ml/h methanol 3.2 600 Non 5.9 575 0.3 ml/h water 2.8 575 Non 4.6 Open image in new window Fig. 5 Coke content versus time-on-stream(s) at 620 °C.
The metabolite content of spent media was measured using spectrophotometric plate reader assay.
The progesterone content of spent media was measured by enzyme-linked immunosorbent assay.
Measurements of the isotopic contents of spent nuclear fuel provide experimental data that are a prerequisite for validating computer codes and nuclear data for many spent fuel applications.
The variations in total petroleum hydrocarbon and hexavalent chromium contents of spent engine oil bioremediation pattern with respect to NPK fertilizer, Tween 80, and pig manure contents were observed to be very significant.
The results from TGA for selected spent catalyst samples are presented in Table 8 in terms of the coke content (g/g cat) of spent catalysts, indicating that without any added water or methanol, the coke content of the spent catalysts increased with increasing reaction temperature.
Total carbon content of the spent and unused P. eryngii substrate was determined by potassium dichromate method (ISO 14235 1998).
The criticality calculations involved must consider burnup by making the most of the experimental and computational capabilities developed, respectively, to measure and predict the isotopic content of the spent nuclear fuel.
Comparison of the coke content at 620 °C indicated that when water was added in the optimum amount, the reduction in the coke content of the spent catalyst was slightly more than when methanol was added in the optimum amount (Fig. 5).
