Question

化工专业英语论文翻译1

for HPLC was used as reaction medium (J.T. Baker, 99.99%)

and H2O2 30% w/w (Merck) was used for decomposition tests,

while analyses used potassium iodide (Sigma-Aldrich), Hydra-

nal-Composite 2 (Fluka), dry methanol for KFT (Fluka), acetic

acid (Sigma-Aldrich), sodium thiosulfate penta-hydrate (99.5%,

Sigma-Aldrich), starch (Sigma-Aldrich), and potassium dichro-

mate (Riedel de Haen). Catalyst has been prepared as already¨

14reported and pre-reduced in situ before use. Preliminary tests

of H2O2 decomposition were carried out to ascertain that the

support alone does not decompose H2O2. We used pure calcined

sulfated ceria at 20 °C, 1 bar for 5 h.14

Reactor Setup for the Experiments. A cocurrent, downflow

TBR was developed. In addition to the motivations already

mentioned, the TBR allows short liquid residence time if

required for selectivity. It is a steady-state reactor, so that

chemical analysis has no limitation on the sampled quantity and

does not affect the reactor operation.

The experimental reactor setup is shown schematically in

Figure 1. The reactor is made of AISI 316 stainless steel, 30

cm long, 1.5 cm I.D., and internally lined with Teflon (1.15 cm

final I.D.) to prevent H2O2 decomposition due to accessible Fe3+

ions. The reactor can accommodate a catalyst bed up to 20 cm

long. An external chiller (Grant LT D6G) allows for working

temperatures between -20 and 60 °C. Three mass flow

controllers (MFC; Brooks 5850 series) are used to independently

feed the gases: N2, CO2/H2 97.5/2.5%, and O2 (AGA gas). MFC

have been calibrated on actual mass flow; volumetric flow rates

reported in the Figures are calculated with mixture densities

Answer 1

　高效液相色谱法作为反应介质(最难贝克,99.99%)
　　
　　和过氧化氢30% w / w(默克公司)是用于分解测试,
　　
　　在分析使用碘化钾(Sigma-Aldrich),九头蛇-
　　
　　nal-Composite 2(丙烯酰胺)、干燥KFT(丙烯酰胺)甲醇,醋酸
　　
　　酸(Sigma-Aldrich),硫代硫酸钠penta-hydrate(99.5%,
　　
　　Sigma-Aldrich)、淀粉(Sigma-Aldrich)和钾dichro -
　　
　　配偶(里德尔de Haen)。催化剂已经准备为¨
　　
　　14报道和原位还原所有工作点