Nickel aluminate spinel-derived catalysts for aqueous-phase hydrogenolysis of glycerol with in-situ hydrogen production: Effect of molybdenum doping

IF 20.2 1区化学 Q1 CHEMISTRY, PHYSICAL Applied Catalysis B: Environmental Pub Date : 2023-12-29 DOI:10.1016/j.apcatb.2023.123671

D. Gallego-García , U. Iriarte-Velasco , M.A. Gutiérrez-Ortiz , J.L. Ayastuy

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Abstract

The correlation between the physico-chemical properties of bare and Mo-doped nickel aluminate derived catalysts and product distribution during hydrogenolysis of glycerol with in situ produced hydrogen in continuous was investigated. Stoichiometric nickel aluminate spinel was synthesized via citrate sol-gel in a one-pot synthesis and subsequently doped it with 1 wt% Mo, using both sol-gel one-pot and impregnation methods. Catalytic runs were performed at 235 ºC/ 45 bar for 4 h TOS. The results indicate that Mo-doping increased the number of both metal and acid sites, leading to more selectivity towards deoxygenated products. 1,2-propylene glycol was the major liquid product, Mo/NiAl catalyst exhibited the highest yield (27%) and selectivity (39%). Post-reaction characterization revealed that leaching and oxidation of metals could potentially cause catalyst deactivation. 1 wt% Mo-doped nickel aluminate-derived catalysts possess potential for the selective production of 1,2-PG in a eco-friendly process through one-pot coupling H₂ generation and hydrogenolysis reactions.

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铝酸镍尖晶石衍生催化剂用于水相氢解甘油和原位制氢：钼掺杂的影响

研究了裸铝酸镍和掺杂钼的铝酸镍衍生催化剂的物理化学性质与甘油加氢分解过程中连续原位产氢的产物分布之间的相关性。通过柠檬酸盐溶胶-凝胶一锅合成法合成了符合定量的铝酸镍尖晶石，随后采用溶胶-凝胶一锅合成法和浸渍法掺入了 1 wt% 的钼。催化运行在 235 ºC/45 bar 下进行，TOS 为 4 小时。结果表明，钼掺杂增加了金属位点和酸位点的数量，从而提高了对脱氧产物的选择性。1,2-丙二醇是主要的液体产物，Mo/NiAl 催化剂表现出最高的产率（27%）和选择性（39%）。反应后表征显示，金属的浸出和氧化可能会导致催化剂失活。掺杂 1 wt% Mo 的镍铝酸盐衍生催化剂有望通过一锅耦合 H2 生成和氢解反应，以环保工艺选择性地生产 1,2-PG。

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来源期刊

Applied Catalysis B: Environmental 环境科学-工程：化工

CiteScore

38.60

自引率

6.30%

发文量

1117

审稿时长

24 days

期刊介绍： Applied Catalysis B: Environment and Energy (formerly Applied Catalysis B: Environmental) is a journal that focuses on the transition towards cleaner and more sustainable energy sources. The journal's publications cover a wide range of topics, including: 1.Catalytic elimination of environmental pollutants such as nitrogen oxides, carbon monoxide, sulfur compounds, chlorinated and other organic compounds, and soot emitted from stationary or mobile sources. 2.Basic understanding of catalysts used in environmental pollution abatement, particularly in industrial processes. 3.All aspects of preparation, characterization, activation, deactivation, and regeneration of novel and commercially applicable environmental catalysts. 4.New catalytic routes and processes for the production of clean energy, such as hydrogen generation via catalytic fuel processing, and new catalysts and electrocatalysts for fuel cells. 5.Catalytic reactions that convert wastes into useful products. 6.Clean manufacturing techniques that replace toxic chemicals with environmentally friendly catalysts. 7.Scientific aspects of photocatalytic processes and a basic understanding of photocatalysts as applied to environmental problems. 8.New catalytic combustion technologies and catalysts. 9.New catalytic non-enzymatic transformations of biomass components. The journal is abstracted and indexed in API Abstracts, Research Alert, Chemical Abstracts, Web of Science, Theoretical Chemical Engineering Abstracts, Engineering, Technology & Applied Sciences, and others.