Synergistic catalytic effects of nickel-based catalysts on calcium aluminate supports in methane dry and combined reforming processes

IF 6.9 2区环境科学与生态学 Q1 ENGINEERING, CHEMICAL

Process Safety and Environmental Protection Pub Date : 2025-02-15 DOI:10.1016/j.psep.2025.106903

Ehsan Akbari , Mehran Rezaei , Zahra Montazeri , Roya Monjazi , Gholamali Mansourian

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引用次数: 0

Abstract

The significance of converting natural gas, particularly methane, into valuable chemical components is crucial across various industries. In this investigation, calcium aluminate powders (CA) with various CaO/Al₂O₃ molar ratios were synthesized and the resulting calcined samples were employed as support for the preparation of nickel-based catalysts. The research indicated a significant impact of the calcium aluminate content on the physical and chemical structures as well as the catalytic efficiency of the samples. Among the evaluated samples, 12 wt%Ni/CA with a cement percentage of 30.55 % and a BET area of 8.56 m².g⁻¹ demonstrated superior catalytic activity, stability, and carbon deposition suppression in methane dry reforming. The results indicated that increasing the nickel loading from 6 to 15 wt% enhanced the conversion of CH₄ and CO₂. However, the maximum conversion values for CH₄ and CO₂ were achieved at 92.9 % and 98.4 %, respectively, at 800 ℃ over the sample containing 15 wt% Ni. Additionally, the selected catalyst, 12 wt%Ni/CA, was utilized in the direct reduced iron (DRI) process to assess its potential in DRI process. The study revealed an improvement in CH₄ conversion from 20 % to 91.6 %, and the H₂/CO ratio decreased from 2.55 to 1.9 with an increase in temperature from 600 to 800 ℃. The results also demonstrated satisfactory performance of the studied sample under real feed conditions containing 5 vol% propane.

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来源期刊

Process Safety and Environmental Protection 环境科学-工程：化工

CiteScore

11.40

自引率

15.40%

发文量

929

审稿时长

8.0 months

期刊介绍： The Process Safety and Environmental Protection (PSEP) journal is a leading international publication that focuses on the publication of high-quality, original research papers in the field of engineering, specifically those related to the safety of industrial processes and environmental protection. The journal encourages submissions that present new developments in safety and environmental aspects, particularly those that show how research findings can be applied in process engineering design and practice. PSEP is particularly interested in research that brings fresh perspectives to established engineering principles, identifies unsolved problems, or suggests directions for future research. The journal also values contributions that push the boundaries of traditional engineering and welcomes multidisciplinary papers. PSEP's articles are abstracted and indexed by a range of databases and services, which helps to ensure that the journal's research is accessible and recognized in the academic and professional communities. These databases include ANTE, Chemical Abstracts, Chemical Hazards in Industry, Current Contents, Elsevier Engineering Information database, Pascal Francis, Web of Science, Scopus, Engineering Information Database EnCompass LIT (Elsevier), and INSPEC. This wide coverage facilitates the dissemination of the journal's content to a global audience interested in process safety and environmental engineering.