Preparation of Highly Dispersed Ni/γ-Al2O3 Catalysts via the Heat Treatment of Deposited Basic Nickel Nitrate with a Hydrogen-Containing Gas

IF 0.9 Q4 ENGINEERING, CHEMICAL

Catalysis in Industry Pub Date : 2026-08-17 DOI:10.1134/S2070050426700169

A. L. Nuzhdin, M. V. Bukhtiyarova, V. P. Pakharukova, E. M. Slavinskaya, I. V. Shamanaev, G. A. Bukhtiyarova

{"title":"Preparation of Highly Dispersed Ni/γ-Al2O3 Catalysts via the Heat Treatment of Deposited Basic Nickel Nitrate with a Hydrogen-Containing Gas","authors":"A. L. Nuzhdin, M. V. Bukhtiyarova, V. P. Pakharukova, E. M. Slavinskaya, I. V. Shamanaev, G. A. Bukhtiyarova","doi":"10.1134/S2070050426700169","DOIUrl":null,"url":null,"abstract":"The process of preparing a highly concentrated 18% Ni/Al2O3 catalyst by means of γ-Al2O3 impregnation with a nickel nitrate solution, followed by thermal treatment in a hydrogen-containing atmosphere is studied. The heat treatment of deposited Ni3(OH)4(NO3)2, which is mainly formed after the calcination of the impregnated support dried at 200°C in an H2 medium (H2 content, ≥20%) at 230°C, promotes the formation of a highly dispersed NiO phase. In this case, nitrate ions are completely removed without any growth of active component particles as compared to the Ni3(OH)4(NO3)2 phase. Decreasing the H2 concentration in the gas mixture reduces the nitrate decomposition rate and leads to the growth of active component particles at an H2 content ≤5%. A hypothesis regarding the role of hydrogen in the catalyst precursor calcination process is proposed.","PeriodicalId":507,"journal":{"name":"Catalysis in Industry","volume":"18 3","pages":"225 - 233"},"PeriodicalIF":0.9000,"publicationDate":"2026-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Catalysis in Industry","FirstCategoryId":"1085","ListUrlMain":"https://link.springer.com/article/10.1134/S2070050426700169","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}

引用次数: 0

Abstract

The process of preparing a highly concentrated 18% Ni/Al₂O₃ catalyst by means of γ-Al₂O₃ impregnation with a nickel nitrate solution, followed by thermal treatment in a hydrogen-containing atmosphere is studied. The heat treatment of deposited Ni₃(OH)₄(NO₃)₂, which is mainly formed after the calcination of the impregnated support dried at 200°C in an H₂ medium (H₂ content, ≥20%) at 230°C, promotes the formation of a highly dispersed NiO phase. In this case, nitrate ions are completely removed without any growth of active component particles as compared to the Ni₃(OH)₄(NO₃)₂ phase. Decreasing the H₂ concentration in the gas mixture reduces the nitrate decomposition rate and leads to the growth of active component particles at an H₂ content ≤5%. A hypothesis regarding the role of hydrogen in the catalyst precursor calcination process is proposed.

查看原文本刊更多论文

用含氢气体热处理沉积的碱式硝酸镍制备高分散Ni/γ-Al2O3催化剂

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

Catalysis in Industry ENGINEERING, CHEMICAL-

CiteScore

1.30

自引率

14.30%

发文量

期刊介绍： The journal covers the following topical areas: Analysis of specific industrial catalytic processes: Production and use of catalysts in branches of industry: chemical, petrochemical, oil-refining, pharmaceutical, organic synthesis, fuel-energetic industries, environment protection, biocatalysis; technology of industrial catalytic processes (generalization of practical experience, improvements, and modernization); technology of catalysts production, raw materials and equipment; control of catalysts quality; starting, reduction, passivation, discharge, storage of catalysts; catalytic reactors.Theoretical foundations of industrial catalysis and technologies: Research, studies, and concepts : search for and development of new catalysts and new types of supports, formation of active components, and mechanochemistry in catalysis; comprehensive studies of work-out catalysts and analysis of deactivation mechanisms; studies of the catalytic process at different scale levels (laboratory, pilot plant, industrial); kinetics of industrial and newly developed catalytic processes and development of kinetic models; nonlinear dynamics and nonlinear phenomena in catalysis: multiplicity of stationary states, stepwise changes in regimes, etc. Advances in catalysis: Catalysis and gas chemistry; catalysis and new energy technologies; biocatalysis; nanocatalysis; catalysis and new construction materials.History of the development of industrial catalysis.