The promoting effect of magnesium on NiMgLaZr catalysts for biogas upgrading to syngas via a tri-reforming process

IF 5.8 2区生物学 Q1 AGRICULTURAL ENGINEERING

Biomass & Bioenergy Pub Date : 2024-12-31 DOI:10.1016/j.biombioe.2024.107588

Santiago Veiga, Mariano Romero, Darío Segobia, Carlos Apesteguía, Juan Bussi

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引用次数: 0

Abstract

The effect of partial substitution of lanthanum by magnesium on the catalytic activity of the Ni-La2Zr2O7 catalyst in the biogas tri-reforming reaction was studied. Four catalysts, Ni-La2-xMgxZr2O7-δ (x = 0.25, 0.5, 0.75, and 1), were prepared using a modified polymeric precursor method, characterized using several techniques, and evaluated at 800 °C with a sub-stoichiometric molar feed composition of CH4/CO2/H2O/O2 = 1/0.33/0.33/0.08. The catalyst with x = 0.5 showed the best performance, which is attributed to its optimum properties of nickel particle size, metal-support interactions, and basicity. A stability test was performed with this catalyst using a molar feed composition of CH4/CO2/H2O/O2 = 1/0.33/0.67/0.08, previously optimized to obtain a synthesis gas with a H2/CO ≈ 2 molar ratio for 100 h, and compared with a commercial steam reforming catalyst. The catalyst with x = 0.5 exhibited higher CH4 and CO2 conversions, a lower amount of carbon deposited, and a lower degree of nickel particle sintering.

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来源期刊

Biomass & Bioenergy 工程技术-能源与燃料

CiteScore

11.50

自引率

3.30%

发文量

258

审稿时长

60 days

期刊介绍： Biomass & Bioenergy is an international journal publishing original research papers and short communications, review articles and case studies on biological resources, chemical and biological processes, and biomass products for new renewable sources of energy and materials. The scope of the journal extends to the environmental, management and economic aspects of biomass and bioenergy. Key areas covered by the journal: • Biomass: sources, energy crop production processes, genetic improvements, composition. Please note that research on these biomass subjects must be linked directly to bioenergy generation. • Biological Residues: residues/rests from agricultural production, forestry and plantations (palm, sugar etc), processing industries, and municipal sources (MSW). Papers on the use of biomass residues through innovative processes/technological novelty and/or consideration of feedstock/system sustainability (or unsustainability) are welcomed. However waste treatment processes and pollution control or mitigation which are only tangentially related to bioenergy are not in the scope of the journal, as they are more suited to publications in the environmental arena. Papers that describe conventional waste streams (ie well described in existing literature) that do not empirically address ''new'' added value from the process are not suitable for submission to the journal. • Bioenergy Processes: fermentations, thermochemical conversions, liquid and gaseous fuels, and petrochemical substitutes • Bioenergy Utilization: direct combustion, gasification, electricity production, chemical processes, and by-product remediation • Biomass and the Environment: carbon cycle, the net energy efficiency of bioenergy systems, assessment of sustainability, and biodiversity issues.