Promoters are addedto Cu-based catalysts to enhance ethanol and higher-alcoholselectivity.4,18,28 An optimum promoter concentration is necessaryto obtain higher selectivity2628,36 and activity of a catalyst.3739In general, Cu-based catalysts have been widely used andproduced promising results in the temperature range of280310 C23,24,26,29,30,34,35,38,4043 at pressures of about40100 bar.25,27,29,31,32,35,38,41,42,4448 A pressure range of5570 bar seems to be the optimum for higher-alcoholsynthesis.43,49 The H2/CO ratio is another important parameterand reported to be between 0.45 and 2.33 by variousresearchers.24,26,27,2931,38,41,42,44,48,50 In general, low H2/COratios (e2) favor the selectivity toward higher alcohols,6,34,43,49but a H2/CO ratio as low as 0.5 gives greatly reducedactivity
将助催化剂添加到铜基催化剂中以增强乙醇和更高的醇<br>选择性[ <br>4,18,28],最佳的助催化剂浓度对于获得更高的选择性[26-28,36]和催化剂的活性[37-39] 是必不可少<br>的。催化剂已被广泛使用,并<br>在<br>280至310°C 的温度范围内,约<br>40至100 bar.25、27、30、34、35、38、40、43 的温度范围内产生了可喜的结果。29,31,32,35,38,41,42,44?48高压合成<br>的最佳压力范围是55?70 bar.43,49 <br>H2 / CO比是另一个重要参数<br>,据报道在不同<br>研究人员的共同作用下介于0.45和2.33之间。24,26,27,29?31,38,41,42,44,48,50通常,低H2 / CO<br>比率(e2)有利于对高级醇的选择性6,34,43,49,<br>但H2 / CO比率低至0.5则大大降低了<br>活性
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在铜基催化剂上添加促进剂以增强乙醇和高级醇<br>选择性。4,18,28一个最佳的促进剂浓度是必要的<br>以获得更高的选择性26 28,36和催化剂的活性。37 39<br>一般来说,铜基催化剂已被广泛应用<br>在<br>280 310 C23,24,26,29,30,34,35,38,40 43,压力约为<br>40 100巴。25、27、29、31、32、35、38、41、42、44 48 A压力范围<br>55 70巴似乎是酒精含量较高的最佳选择<br>合成。43,49氢/钴比是另一个重要参数<br>据报道在0.45到2.33之间<br>研究人员:24,26,27,29 31,38,41,42,44,48,50,一般来说,低氢/一氧化碳<br>比率(e2)有利于对高级醇的选择性,6,34,43,49<br>但是低至0.5的H2/CO比会大大降低<br>活动<br>
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