英语翻译Although waterformation (experimentally measured) is considered19,28,31,32 anindication of Pd2+ in the absence of promoters (e.g.,halide ionsand acids),their addition causes Pd2+ to be active for H2O2production14-16,19,20,31-33 as well.Th

英语翻译Although waterformation (experimentally measured) is considered19,28,31,32 anindication of Pd2+ in the absence of promoters (e.g.,halide ionsand acids),their addition causes Pd2+ to be active for H2O2production14-16,19,20,31-33 as well.Th
英语翻译
Although waterformation (experimentally measured) is considered19,28,31,32 an
indication of Pd2+ in the absence of promoters (e.g.,halide ions
and acids),their addition causes Pd2+ to be active for H2O2
production14-16,19,20,31-33 as well.The actual oxidation state
in the presence of both O2 and H2 may vary.In addition,their
concentration varies along the bed due to the reaction and
different solubility.The O2/H2 ratio increases along the bed,
possibly changing the local Pd oxidation state.On these
arguments,consideration on the mechanism can be developed,
as discussed later.
During each single test,the liquid phase is sampled at the
reactor exit,and water (volumetric Karl Fischer) and H2O2
(iodometric titration) concentrations are measured.Water content
is also measured prior to each experiment,before feeding O2.
Production rate is defined as mol of H2O2 produced/min,and it
is given by the H2O2 concentration measured in the liquid
sampled (almost pure methanol,after flashing) times the
methanol flow rate set at its MFC,as representative of the liquid
flow rate.Selectivity is defined as 100 × [H2O2]/([H2O2] +
[H2O]prod); it is equal to the moles of H2O2 produced,divided
by the moles of H2 consumed.

英语翻译Although waterformation (experimentally measured) is considered19,28,31,32 anindication of Pd2+ in the absence of promoters (e.g.,halide ionsand acids),their addition causes Pd2+ to be active for H2O2production14-16,19,20,31-33 as well.Th
[第一句错了]
表明Pd2 +没有促进剂(如.卤化物离子
和酸),他们除了导致Pd2 +是过氧化氢的活性
31-33 production14-16,19日,20日.实际的氧化态
在H2 O2和可能会有所不同.此外,他们
浓度沿床由于反应和变化
不同的溶解度.沿床,O2 / H2比率增加
可能改变当地的Pd氧化态.在这些
参数,考虑机制可以开发,
稍后讨论.
在每一个测试中,液相取样的
反应器出口,和水(体积费歇尔)和过氧化氢
(碘量滴定的滴定)浓度测量.水含量
之前还测量了每个实验之前,喂养O2.
产生的过氧化氢产率被定义为摩尔/分钟,和它
给出的过氧化氢浓度测量液体吗
采样(几乎纯甲醇,闪烁后)倍
甲醇流量MFC,设置为代表的液体
流量.选择性是指100×(过氧化氢)/((过氧化氢)+
[水]刺激),它等于生产过氧化氢的摩尔数,分裂
由H2消耗的摩尔数.
意见与反馈