Hydrogenolysis of alginic acid over mono and bimetallic ruthenium/nickel supported on activated carbon catalysts with basic promoters,Reaction Chemistry & Engineering

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Hydrogenolysis of alginic acid over mono and bimetallic ruthenium/nickel supported on activated carbon catalysts with basic promoters
Reaction Chemistry & Engineering ( IF 3.4 ) Pub Date : 2020-07-20 , DOI: 10.1039/d0re00224k
Seungdo Yang _{1,

2,

3,

4,

5} , Hyungjoo Kim _{1,

2,

3,

4,

5} , Do Heui Kim _{1,

2,

3,

4,

5}

Affiliation

Hydrogenolysis of alginic acid, derived from macroalgae, over Ru, Ni and Ru–Ni supported on activated carbon catalysts was performed in a batch reactor using NaOH, CaCO₃, Ca(OH)₂, and Mg(OH)₂ as basic promoters. Among the promoters used, NaOH provides the highest carbon efficiency and yield of glycols, such as ethylene glycol and 1,2-propanediol. In addition, various organic acids such as lactic acid, glycolic acid, and formic acid were produced in the form of salts. The hydrogenolysis of potential intermediates such as sorbitol, mannitol, lactic acid, and glycolic acid demonstrated direct conversion of alginic acid to glycols without sugar alcohols or organic acids as reaction intermediates. Furthermore, Ru–Ni bimetallic catalysts as a function of the Ni/Ru molar ratio were used to increase the yield of and selectivity to glycols. The highest yield of glycols, 24.1%, was obtained when the Ni/Ru molar ratio was 1 : 1, due to the enhanced interaction between Ru and Ni based on H₂-TPR.

中文翻译：

带有碱性助催化剂的活性炭催化剂上负载的单金属和双金属钌/镍上的藻酸氢解

在NaOH，CaCO ₃，Ca（OH）₂和Mg（OH）₂的间歇反应器中，在活性炭催化剂上负载的Ru，Ni和Ru-Ni上对大型藻类衍生的藻酸进行氢解。作为基本的推动者。在使用的促进剂中，NaOH可提供最高的碳效率和乙二醇（例如乙二醇和1,2-丙二醇）的收率。另外，以盐的形式产生各种有机酸，例如乳酸，乙醇酸和甲酸。潜在中间体（如山梨糖醇，甘露糖醇，乳酸和乙醇酸）的氢解反应表明，藻酸可直接转化为乙二醇，而无需糖醇或有机酸作为反应中间体。此外，Ru-Ni双金属催化剂作为Ni / Ru摩尔比的函数，可以提高二元醇的收率和选择性。当Ni / Ru摩尔比为1：1时，由于基于H ₂ -TPR的Ru和Ni之间增强的相互作用，二醇的最高收率为24.1％。

更新日期：2020-08-25

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