英语翻译The production rate at 10 bar,-10 °C (Figure 4) is large

英语翻译
The production rate at 10 bar,-10 °C (Figure 4) is larger
with a small liquid flow rate.Recalling that productivity is
defined as the product of liquid flow rate times the outlet H2O2
concentration,its increase with smaller liquid flow rate implies
that the kinetics grows more than linearly with residence time.
Further,productivity varies with gas flow rate,always going
through a maximum,i.e.,an optimum gas flow rate can be
identified for every liquid flow rate examined.An optimum can
be identified with respect to liquid flow rate also.The maximum
production rate is measured with a small flow rate (0.5 mL/
min),but not the lowest tested (0.3 mL/min),implying a
nonlinear effect.
As discussed through the mechanism of Scheme 1,selectivity
due to the competing reactions is a major issue for direct
synthesis.Selectivity in the previous experiments is shown in
Figure 5.Again,the effect of both flow rates is dramatic,with
optimum selectivity at intermediate values.At small gas flow
rates the selectivity is always quite poor.The maximum
selectivity was achieved with liquid flow rates of 1 and 0.75
mL/min,but at correspondingly different gas flow rates.Note
that conditions for good production rate do not always match
those required for a high selectivity.