英语翻译to directly affect the reaction extent,which takes place
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英语翻译
to directly affect the reaction extent,which takes place at the
liquid-solid interface.Indirectly,a larger gas flow rate has two
effects:(i) it can increase the mass transfer rate between gas
and liquid (i.e.,higher conversion),and (ii) it reduces the
volumetric fraction of liquid,causing larger liquid velocities,
then lower liquid/solid contact time (i.e.,a smaller conversion).
The first effect is negligible,unless the liquid flow rate is large,
requiring a comparatively large transfer rate from the gas.Soon
after the minimum gas flow rate,the second effect prevails all
the time.We conclude that larger gas flow rates almost always
cause a lower conversion.
H2 always increases the H2O2 degradation.Overall,both paths
can decompose up to 20% of the H2O2 available,at the low
0.5% mol concentration,with a minimum >1% at the highest
flow rates.These values provide an upper bound for the
synthesis,given that H2O2 is gradually produced along the bed.
Hydrogenation accounts for approximately 1/3 of the total
degradation,suggesting that synthesis can be viable,if its rate
can be sufficiently higher than the significant degradation
processes.
to directly affect the reaction extent,which takes place at the
liquid-solid interface.Indirectly,a larger gas flow rate has two
effects:(i) it can increase the mass transfer rate between gas
and liquid (i.e.,higher conversion),and (ii) it reduces the
volumetric fraction of liquid,causing larger liquid velocities,
then lower liquid/solid contact time (i.e.,a smaller conversion).
The first effect is negligible,unless the liquid flow rate is large,
requiring a comparatively large transfer rate from the gas.Soon
after the minimum gas flow rate,the second effect prevails all
the time.We conclude that larger gas flow rates almost always
cause a lower conversion.
H2 always increases the H2O2 degradation.Overall,both paths
can decompose up to 20% of the H2O2 available,at the low
0.5% mol concentration,with a minimum >1% at the highest
flow rates.These values provide an upper bound for the
synthesis,given that H2O2 is gradually produced along the bed.
Hydrogenation accounts for approximately 1/3 of the total
degradation,suggesting that synthesis can be viable,if its rate
can be sufficiently higher than the significant degradation
processes.
直接影响反应的程度,这发生在
液 - 固界面.间接地,较大的气体流量有两个
效果:( i)其可以增加气体之间的传质速率
和液体(即,更高的转化率) ,以及(ii)它减少了
液体容积率,造成较大的液体的速度,
然后降低液体/固体接触时间(即,一个较小的转换) .
第一个效果是可以忽略不计的,除非液体流速大,
需要从气体中比较大的传输速率.不久
的最小气体流速后,所述第二效果为准所有
的时间.我们的结论是较大的气体流速几乎总是
导致较低的转换.
H2总是增加的H2O2降解.总体而言,这两个路径
可以分解到可用H 2 O 2的20%,在低
0.5%摩尔浓度,以最小的> 1% ,在最高
流速.这些值提供了一个上限为
合成的,因为H 2 O 2被逐渐沿床生产.
氢化大约占总量的三分之一
降解,这表明合成可以是可行的,如果它的速率
可以比显著降解足够高
流程.
液 - 固界面.间接地,较大的气体流量有两个
效果:( i)其可以增加气体之间的传质速率
和液体(即,更高的转化率) ,以及(ii)它减少了
液体容积率,造成较大的液体的速度,
然后降低液体/固体接触时间(即,一个较小的转换) .
第一个效果是可以忽略不计的,除非液体流速大,
需要从气体中比较大的传输速率.不久
的最小气体流速后,所述第二效果为准所有
的时间.我们的结论是较大的气体流速几乎总是
导致较低的转换.
H2总是增加的H2O2降解.总体而言,这两个路径
可以分解到可用H 2 O 2的20%,在低
0.5%摩尔浓度,以最小的> 1% ,在最高
流速.这些值提供了一个上限为
合成的,因为H 2 O 2被逐渐沿床生产.
氢化大约占总量的三分之一
降解,这表明合成可以是可行的,如果它的速率
可以比显著降解足够高
流程.
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