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guolianshun銅蟲 (著名寫手)
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[求助]
請幫我翻譯一段文摘謝謝，自己翻譯了幾遍，老板很不滿意。謝謝。
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A monolithic cocurrent downflow contactor (CDC) reactor was used for the palladium catalysed liquid phase hydro-genation of 2-butyne-1,4-diol (B) tocis-2-butene-1,4-diol (C) in the temperature range 293–333 K and in the pressure range 102–304 kPa. Its performance was compared with a slurry CDC reactor and a stirred tank reactor (STR). Appar-ent energy of activation (46–54.5 kJ/mol) and transport calculations indicated the reaction was surface rate controlled. A Langmuir–Hinshelwood mechanism was used to model the reaction. A good agreement was found between the rates from the model and the experimental rates. Selectivity to the product C was significantly greater for the monolith and slurry CDC (0.980–0.993) compared with the STR (0.90–0.95) at conversions of B approaching 100%. It was concluded that the monolith CDC possesses a performance comparable with the slurry CDC particularly in the selective production of C, but has the added advantage of allowing easy catalyst separation. |
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