Study on preparation of ordered mesoporous silica supported NiGaCo catalyst for conversion of carbon dioxide to methanol
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Study on preparation of ordered mesoporous silica supported NiGaCo catalyst for conversion of carbon dioxide to methanol Hong Khanh Dieu Nguyen1 · Nguyen Ngoc Tran1 · Ngo Thi Dinh1 · Toan Dang Nguyen1 · Don Ngoc Ta2 · Duc Sy Dao3 Accepted: 5 October 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract The paper reported preparation, characterization and application of novel ordered mesoporous silica supported NiGaCo catalyst in direct conversion of carbon dioxide to methanol. The catalyst was prepared by doping Ni2+, Ga3+ and Co2+ onto ordered mesoporous amorphous silica support (MSO) through wet impregnation–condensation method followed by calcination and reduction to transfer the metallic cation states to the alloy ones. The catalyst was assigned as NiGaCo/MSO, being prepared under conditions such as room temperature, time of 24 h, calcination at 600 °C for 6 h, and reduction in O2 to methanol at low pressure. Investigations illustrated high NaBH4/ethanol solution, and could be used for converting C activity of the catalyst at high pressure of 35 bars but at low pressure of 5 bar, the catalyst still showed considerable activity and selectivity. Many techniques were applied for the catalysis characterization including Small Angle X-Ray Diffraction (SAXRD), Wide Angle X-Ray Diffraction (WAXRD), Fourier Transform-Infrared Spectroscopy (FT-IR), Thermal Gravimetric–Differential Scanning Calorimetry–Mass Spectroscopy (TG–DSC–MS) and X-Ray Photoelectron Spectroscopy (XPS). Gas Chromatography (GC) coupled Thermal Conductivity Detector (TCD) and Flame Ionized Detector (FID) were used for determining the gas composition. Keywords Mesoporous silica · Ni5Ga3 · Methanol synthesis · Carbon dioxide · Cobalt promoter
1 Introduction Methanol could be considered as a fuel, precursor or energy storage source in industrial economy because of its easy storage and transportation. Using methanol in industrial chemistry processes has been estimated a crucial development nowadays. Some of aspects when using methanol could be described as followed: high octane rate (107–115), high effectiveness in fuel cell, excellent candidate for dimethyl ether production, high cetane number (55) also, an important source for olefin production and then the most chemicals in cosmetic and industrial substances. Methanol economy once was mentioned because of these advanced properties [1–4].
* Hong Khanh Dieu Nguyen [email protected] 1
Hanoi University of Science and Technology, Hanoi, Vietnam
2
Ministry of Education and Training, Hanoi, Vietnam
3
VNU University of Science, Hanoi, Vietnam
Methanol could be synthesized from syn-gas (CO and H 2 mixture at certain ratio) using many types of catalysis, for example ZnO supported Cu [5, 6], mixed ZnO and A l 2O 3 supported Cu [6, 7], mixed ZnO, Al2O3 and ZrO2 supported Cu [7], and Pd based catalysts as well [8–11], etc. The drawbacks of these catalysts were pointed out in either low activity, selectivity or high expense. The synthesis o
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