A review on glycerol reforming processes over Ni-based catalyst for hydrogen and syngas productions

Roslan, Nurul Asmawati; Abidin, Sumaiya Zainal; Ideris, Asmida; Vo, Dai‐Viet N.

doi:10.1016/j.ijhydene.2019.08.211

Cited by 107 publications

(56 citation statements)

References 134 publications

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“…Its viscosity and auto-ignition temperature are high and the presence of impurities can influence combustion, making it ineffective [43][44][45]. Moreover, this process is not environmentally friendly, as some contaminant emissions such as acrolein can be released into the environment and the production of CO 2 increases the process's carbon footprint [20,45,46]. Nonetheless, this kind of pollutant can be removed through the oxy-combustion of glycerol [45].…”

Section: Combustionmentioning

confidence: 99%

“…Although biodiesel plants can use crude glycerol for energy generation by a direct burning process, it is not suitable due to the high viscosity and ignition point of glycerol, as well as the generation of several toxic compounds (such as acrolein). Consequently, reforming can be a good choice, especially since this kind of process can be easily adapted to existing industrial facilities [20]. The reforming process can be done on crude glycerol directly, which is an interesting alternative for the management of glycerol, as the purification of crude glycerol can be expensive and it cannot be directly used for other purposes due to its impurities (fatty acid methyl esters, water, rest of the catalysts, etc.).…”

Section: Glycerol Reformingmentioning

confidence: 99%

“…Consequently, the combined use of metals as catalysts to produce bimetallic catalysts, as well as the suitable selection of a support (depending on its porosity, redox properties, and thermal stability, among others), are important for obtaining a highly active and stable catalyst. Alumina is the preferred and most common support employed for this purpose, due to its high specific surface and thermal stability, although it tends to deactivate due to carbon deposition [20]. In the following subsections, different kinds of glycerol reforming are briefly explained, pointing out the particularities of catalyst implementation.…”

Section: Glycerol Reformingmentioning

confidence: 99%

“…Additionally, H 2 can be used in the food industry (hydrogenation) or refineries (hydrocracking). On the other hand, syngas can be used in Fischer-Tropsch synthesis [20]. The main advantages of SR are its low cost and great development (starting in 1930), which explains the possibility of implementing it without significant modifications in industries.…”

Section: Steam Reforming (Sr)mentioning

confidence: 99%

“…The glycerol content and its high valorization potential justify its selection as a platform molecule [2,15,16]. As a highly functionalized molecule, glycerol can be incorporated as a raw material into processes to obtain molecules of industrial interest, providing sustainable route alternatives to the traditional ones, based on petroleum [16][17][18][19][20][21]. Therefore, many processes (as will be explained in the following sections) can make glycerol a valuable by-product, by obtaining a purer product (using it for energy purposes) or by chemical reactions (to obtain new compounds).…”

Section: Introductionmentioning

confidence: 99%

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Recent Advances in Glycerol Catalytic Valorization: A Review

et al. 2020

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Once a biorefinery is ready to operate, the main processed materials need to be completely evaluated in terms of many different factors, including disposal regulations, technological limitations of installation, the market, and other societal considerations. In biorefinery, glycerol is the main by-product, representing around 10% of biodiesel production. In the last few decades, the large-scale production of biodiesel and glycerol has promoted research on a wide range of strategies in an attempt to valorize this by-product, with its transformation into added value chemicals being the strategy that exhibits the most promising route. Among them, C3 compounds obtained from routes such as hydrogenation, oxidation, esterification, etc. represent an alternative to petroleum-based routes for chemicals such as acrolein, propanediols, or carboxylic acids of interest for the polymer industry. Another widely studied and developed strategy includes processes such as reforming or pyrolysis for energy, clean fuels, and materials such as activated carbon. This review covers recent advances in catalysts used in the most promising strategies considering both chemicals and energy or fuel obtention. Due to the large variety in biorefinery industries, several potential emergent valorization routes are briefly summarized.

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Section: Combustionmentioning

confidence: 99%

Section: Glycerol Reformingmentioning

confidence: 99%

Section: Glycerol Reformingmentioning

confidence: 99%

Section: Steam Reforming (Sr)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Recent Advances in Glycerol Catalytic Valorization: A Review

et al. 2020

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Insight into the selective oxidation mechanism of glycerol to 1,3‐dihydroxyacetoneoverAuCu–ZnOinterface

Zhao

Liu

et al. 2022

AIChE Journal

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Directional regulation of polyol oxidation selectivity by constructing active sites with specific structure is a critical yet challenging problem. Herein, the specific Au‐based catalyst with efficient Au–Cu–ZnO interfacial active sites was successfully designed to promote selective oxidation of glycerol to 1,3‐dihydroxyacetone under mild conditions. X‐ray absorption spectroscopy revealed that the increased electron transfer between Au and Cu increases the content of Au+, resulting in the higher catalytic activity (turnover frequency: 402.5 h−1). Meanwhile, small AuCu alloy nanoparticles (ca., 2.7 nm) could be inserted into the ZnO lattice with the formation of Au(Cu)–O–Zn linkages, resulting in the enrichment of interfacial oxygen vacancies. These interfacial oxygen vacancies induce the activation and adsorption of the secondary hydroxyl group of glycerol on the interfacial active sites, improving the selectivity of 1,3‐dihydroxyacetone (83.4%). Furthermore, in situ Fourier transform infrared, structure‐dependent kinetics and density functional theory calculation demonstrated that Au–Cu–ZnO interfacial active sites could enhance the participation of OH* and oxygen vacancies in activating the OH and CH bonds, respectively, promoting the improvement of the catalytic performance. The outcome of this work offers new insights for the rational design of high effective catalyst for the selective oxidation of polyol.

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Synthesis of Glycerol Carbonate from Glycerol and CO₂ Using CaO as a Dehydrating Agent

et al. 2022

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Glycerol carbonate, a high value-added chemical, is produced from glycerol, a surplus biomass byproduct of biodiesel production, and carbon dioxide, an inexhaustible raw material. In this study, calcium oxide (CaO) was used as a regenerable dehydrating agent, and Zn(OTf) 2 /1,10-phenanthroline was used as the catalyst. Stirring with a common magnetic stirrer bar was found to be unsuitable for the reaction, owing to the solidification of calcium components after dehydration. However, mechanical stirring effectively resolves this issue and produces a high yield. The only byproduct of the reaction is H 2 O, since CaO is regenerable. In addition, because the carbon atoms of biomass-derived glycerol are obtained from CO 2 fixed by plant photosynthesis, all the carbon atoms of glycerol carbonate can be said to be derived from CO 2 . This approach can be used for the syntheses of other cyclic carbonates as well.

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A review on glycerol reforming processes over Ni-based catalyst for hydrogen and syngas productions

Cited by 107 publications

References 134 publications

Recent Advances in Glycerol Catalytic Valorization: A Review

Recent Advances in Glycerol Catalytic Valorization: A Review

Insight into the selective oxidation mechanism of glycerol to 1,3‐dihydroxyacetoneoverAuCu–ZnOinterface

Synthesis of Glycerol Carbonate from Glycerol and CO₂ Using CaO as a Dehydrating Agent

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A review on glycerol reforming processes over Ni-based catalyst for hydrogen and syngas productions

Cited by 107 publications

References 134 publications

Recent Advances in Glycerol Catalytic Valorization: A Review

Recent Advances in Glycerol Catalytic Valorization: A Review

Insight into the selective oxidation mechanism of glycerol to 1,3‐dihydroxyacetoneoverAuCu–ZnOinterface

Synthesis of Glycerol Carbonate from Glycerol and CO2 Using CaO as a Dehydrating Agent

Contact Info

Product

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About

Synthesis of Glycerol Carbonate from Glycerol and CO₂ Using CaO as a Dehydrating Agent