英语翻译As previously discussed concerning hydrogenation anddecomposition experiments,we speculate that selectivity lowerthan 80% indicates excess water formation directly from H2 andO2.Selectivity in these experiments is always below 80%,butat t
来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/17 23:58:24
英语翻译As previously discussed concerning hydrogenation anddecomposition experiments,we speculate that selectivity lowerthan 80% indicates excess water formation directly from H2 andO2.Selectivity in these experiments is always below 80%,butat t
英语翻译
As previously discussed concerning hydrogenation and
decomposition experiments,we speculate that selectivity lower
than 80% indicates excess water formation directly from H2 and
O2.Selectivity in these experiments is always below 80%,but
at the small liquid and gas flow rates the contribution is quite
significant.We conclude that the mechanism for H2O2 direct
synthesis must account for the parallel water formation and the
decomposition of H2O2 to water,usually neglected.14-17
The nonlinear effect of liquid flow rate is evident from Figure
6,where experimental results at a fixed gas flow rate (2.7 mL/
min) are shown.A maximum in both selectivity and productivity
is observed,but at different conditions.The liquid flow rate
affects contact times with the catalyst and likely its wetting.
Interestingly,a TBR allows independent setting of liquid and
gas flow rates (within a range that keeps the same hydrodynamic
regime) to maximize either productivity or selectivity.Results
indicate that we successfully took advantage of the short contact
time that can be achieved (order of a few seconds) and the
possibility of finely tuning it to select an optimal path through
the mechanism.
英语翻译As previously discussed concerning hydrogenation anddecomposition experiments,we speculate that selectivity lowerthan 80% indicates excess water formation directly from H2 andO2.Selectivity in these experiments is always below 80%,butat t
正如前面所讨论的关于加氢
分解实验,我们推测,选择性较低
超过80%表示过量的水形成直接从H2和
O2.在这些实验中的选择性是总是低于80%,但
在小的液体和气体的流动速率的贡献是相当fl
但fi斜面.我们得出这样的结论:对H2O2的直接机制
合成必须考虑水的形成和平行
过氧化氢的水分解,通常neglected.14-17
fl液体流量的非线性效应是明显的从图
6,在一个fi实验结果fl固定气体流量(2.7毫升/
分钟)显示.在选择性和产量最大
被观察到,但在不同的条件下.液体fl流量
影响接触时间与催化剂和可能的润湿性.
有趣的是,一个独立的设置和TBR允许液体
气fl流动速率(在一定范围内保持同一水动力
政权)以最大限度地提高生产率和选择性.结果
表明,我们成功地利用了短暂的接触
时间,可以实现(几秒钟的顺序)和
精细调整它的fi选择最优路径的可能性
机制.