Ni-enacapulated carbon catalyst with enhanced catalytic stability for hydrogenation of levulinic acid to γ-valerolactone

IF 3.9 2区化学 Q2 CHEMISTRY, PHYSICAL

Molecular Catalysis Pub Date : 2025-07-25 DOI:10.1016/j.mcat.2025.115359

G. Manasa , Ramineni Kishore , Pradeep Kumar Challa

{"title":"Ni-enacapulated carbon catalyst with enhanced catalytic stability for hydrogenation of levulinic acid to γ-valerolactone","authors":"G. Manasa , Ramineni Kishore , Pradeep Kumar Challa","doi":"10.1016/j.mcat.2025.115359","DOIUrl":null,"url":null,"abstract":"<div><div>In this study, we demonstrate that applying a nitrogen-doped carbon coating to nickel (Ni@NC) improves its durability for converting levulinic acid (LA) into γ-valerolactone (GVL) through hydrogenation. Various characterization techniques revealed that the carbon structure is porous, with nickel being highly dispersed and embedded due to a strong interaction between the nickel and carbon framework. Catalytic tests for LA hydrogenation were conducted at temperatures ranging from 200 to 260 °C under atmospheric pressure, with different weight hourly space velocity (WHSV) values. The Ni@NC catalyst was found to be optimal, achieving 88% conversion of LA and 100% selectivity for GVL at 240 °C with a WHSV of 1.14 h<sup>-1</sup>. This catalyst maintained a high GVL yield and excellent long-term stability for 100 hours under conditions of WHSV of 2.28 h<sup>-1</sup> at 260 °C and atmospheric pressure. In contrast, the Ni/g-C<sub>3</sub>N<sub>4</sub> catalyst, prepared using the impregnation method, produced a good GVL yield but exhibited poor stability under the same conditions. These findings suggest that catalysts with strong metal-support interactions can potentially improve stability.</div></div>","PeriodicalId":393,"journal":{"name":"Molecular Catalysis","volume":"585 ","pages":"Article 115359"},"PeriodicalIF":3.9000,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Molecular Catalysis","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2468823125005474","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}

引用次数: 0

Abstract

In this study, we demonstrate that applying a nitrogen-doped carbon coating to nickel (Ni@NC) improves its durability for converting levulinic acid (LA) into γ-valerolactone (GVL) through hydrogenation. Various characterization techniques revealed that the carbon structure is porous, with nickel being highly dispersed and embedded due to a strong interaction between the nickel and carbon framework. Catalytic tests for LA hydrogenation were conducted at temperatures ranging from 200 to 260 °C under atmospheric pressure, with different weight hourly space velocity (WHSV) values. The Ni@NC catalyst was found to be optimal, achieving 88% conversion of LA and 100% selectivity for GVL at 240 °C with a WHSV of 1.14 h^-1. This catalyst maintained a high GVL yield and excellent long-term stability for 100 hours under conditions of WHSV of 2.28 h^-1 at 260 °C and atmospheric pressure. In contrast, the Ni/g-C₃N₄ catalyst, prepared using the impregnation method, produced a good GVL yield but exhibited poor stability under the same conditions. These findings suggest that catalysts with strong metal-support interactions can potentially improve stability.

Abstract Image

查看原文本刊更多论文

提高乙酰丙酸加氢制γ-戊内酯催化稳定性的镍烯制定碳催化剂

在这项研究中，我们证明了在镍（Ni@NC）上应用氮掺杂碳涂层可以提高其通过加氢将乙酰丙酸（LA）转化为γ-戊内酯（GVL）的耐久性。各种表征技术表明，碳结构是多孔的，由于镍和碳框架之间的强相互作用，镍被高度分散和嵌入。在200 ~ 260℃的常压下，以不同的重量时空速（WHSV）值对LA加氢进行了催化试验。结果表明，Ni@NC催化剂在240℃、WHSV为1.14 h-1的条件下，LA转化率为88%，GVL选择性为100%。该催化剂在260℃和常压下，在2.28 h-1的WHSV条件下，维持了100小时的高GVL产率和优异的长期稳定性。而采用浸渍法制备的Ni/g-C3N4催化剂在相同条件下，GVL产率较高，但稳定性较差。这些发现表明，具有强金属-载体相互作用的催化剂可以潜在地提高稳定性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Molecular Catalysis Chemical Engineering-Process Chemistry and Technology

CiteScore

6.90

自引率

10.90%

发文量

700

审稿时长

40 days

期刊介绍： Molecular Catalysis publishes full papers that are original, rigorous, and scholarly contributions examining the molecular and atomic aspects of catalytic activation and reaction mechanisms. The fields covered are: Heterogeneous catalysis including immobilized molecular catalysts Homogeneous catalysis including organocatalysis, organometallic catalysis and biocatalysis Photo- and electrochemistry Theoretical aspects of catalysis analyzed by computational methods