英语翻译4.ConclusionsMeasurements of H2O2 direct synthesis in a

英语翻译
4.Conclusions
Measurements of H2O2 direct synthesis in a TBR,with
Pd-CeS catalyst at 10 and 20 bar at -10 °C,have been reported
and discussed.Independent variations of gas and liquid flow
rates evidence large,nonlinear effects on both H2O2 productivity
and selectivity,always highlighting an optimum at conditions
intermediate within the range investigated.In addition,the role
of pressure (from 10 to 20 bar) indicates that a dramatic increase
of selectivity,up to values of 80%,can be achieved by raising
the pressure.Production rate remains rather poor,mainly
because of the competition of direct water synthesis clearly
spotted by comparing synthesis with decomposition and hy-
drogenation experiments,and the short contact time.
Perhaps the most significant conclusion that can be drawn is
that the reactor type and operation can dramatically modify (both
positively or negatively) the performances of the catalyst.While
much of the efforts on improving H2O2 direct synthesis remain
on the catalyst,results reported here suggest that good catalysts
can be better exploited in suitable,industrially viable reactors.
It is representative in this respect the comparison with semibatch
experiments with the same catalyst,14 where selectivity was
always below 50% vs the approximately 80% measured in the
TBR at 20 bar with suitable gas and liquid flow rates.

4 .结论
过氧化氢直接合成在TBR ,
以Pd - CES催化剂,
在-10 ℃下10和20杆的测量,已报告和讨论.
气体和液体的流动速率大的证据,
对双方的H2O2产率和选择性的非线性效应,
的变化无关总是突出的最佳条件在研究的范围内的中间.
此外,压力的作用（从10到20巴）表示的显着增加的选择性,
高达80％的值,可以通过提高压力来实现.
产率仍然主要是因为水直接合成清楚地察觉了分解和HY- drogenation实验合成的比较竞争比较差,
和短的接触时间.
或许可以得出最显著的结论是,
该反应器类型和操作可以显着地改变（既带正或负）的催化剂的性能.
虽然许多改善过氧化氢直接合成的努力留在催化剂,在这里报告的结果表明,
良好的催化剂可以在合适的工业可行的反应堆得到更好的利用.
它是代表在这方面与半间歇实验具有相同的催化剂,
其中14选择性总是低于50 ％和在20巴与合适的气体和液体的流速测量在TBR的约80％的比较.

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