化工专业英语翻译2

化工专业英语翻译2
determined with aRedlich-Kwong-Soave equation of state

with Boston-Mathiasmodification, through the Aspen Proper-

ties code. The pressureinside the reactor is controlled and

regulated with a backpressure controller (BPC; Brooks 5866

series). A rupture disk islocated before the BPC for safety

reasons. A bypass is usedto achieve the desired pressure inside

the reactor more rapidly.The liquid phase is fed in through a

syringe pump (Teledyne ISCOmodel 500D), connected to a

pressure transducer andcomputer controlled. The syringe

temperature can becontrolled. Gas and liquids mix at a

T-connection before thereactor. A regulation valve is used to

sample the instantaneousliquid phase, while a 1.5 L tank

provides gas-liquidseparation, accumulating all the liquid

product. All the piping ismade of stainless steel AISI 316, 1/8

in. size. The catalyst bed(0.5 cm long) is placed between two

quartz wool plugs. Abovethe upstream quartz wool plug, quartz

sand is used to improvemixing. Temperature inside the reactor

is measured with aK-thermocouple before the catalyst bed. The

apparatus is in a fumehood, with a H2 sensorthat can

automatically switch off H2 flow to the reactor.

H2O2 Experiments and Analyses. H2O2 decomposition and

hydrogenation wereinvestigated first, at 10 bar and -10 °C,

with 0.5% H2O2 in methanol as the liquid phase, varyingits

flow rate (0.5, 1, and 2mL/min). The gas mixture was either

N2/CO2 (20/80% mol) for pure decomposition, or H2/N2/CO2

(2/18/80% mol) forhydrogenation experiments (N2 replaces O2),

varying its flow rates (0.1, 1, 2, 2.7, 4, 6, 9,and 12 mL/min)