Cobalt–Alumina Coprecipitated Catalysts for Green Diesel Production

Nikolopoulos, Ioannis; Kogkos, George; Andriopoulou, Chrysanthi; Kordouli, Eleana; Dracopoulos, Vassilios; Bourikas, Kyriakos; Kordulis, Christos; Lycourghiotis, Alexis

doi:10.1021/acs.iecr.1c02106

Cited by 9 publications

(4 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…H 2 -TPD experiments were implemented to determine the ability of Cu-CoGa catalysts for dissociating hydrogen (Figure 6A). In all cases, H 2 -TPD curves can be deconvoluted into three regions, which are attributed to the desorption of chemisorbed H 2 on metallic Cu 0 sites (50−150 °C) 47 and CoGaO x species (150−350 °C) 48 and spillover hydrogen from Cu 0 and CoGaO x species to the support (>350 °C), 49 respectively, as evidenced by the H 2 -TPD results of CuGa-0.4 and CoGa-0.4 reference samples (Figure S16A). As summarized in Table 2, the quantitative H 2 -TPD results reveal that the amount of H 2 desorbed from Cu 0 sites reaches the maximum in the Cu-CoGa-0.4 sample, well consistent with the results of N 2 O titration.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Ga-Promoted CuCo-Based Catalysts for Efficient CO₂ Hydrogenation to Ethanol: The Key Synergistic Role of Cu-CoGaO_x Interfacial Sites

Zhang

Fan

Zheng

et al. 2022

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Currently, direct catalytic CO2 hydrogenation to produce ethanol is an effective and feasible way for the resource utilization of CO2. However, constructing non-precious metal catalysts with satisfactory activity and desirable ethanol selectivity remains a huge challenge. Herein, we reported gallium-promoted CuCo-based catalysts derived from single-source Cu-Co-Ga-Al layered double hydroxide precursors. It was manifested that the introduction of Ga species could strengthen strong interactions between Cu and Co oxide species, thereby modifying their electronic structures and thus facilitating the formation of abundant metal-oxide interfaces (i.e., Cu0/Cu+-CoGaO x interfaces). Notably, the as-constructed Cu-CoGa catalyst with a Ga:Co molar ratio of 0.4 exhibited a high ethanol selectivity of 23.8% at a 17.8% conversion, along with a high space–time yield of 1.35 mmolEtOH·gcat –1·h–1 for ethanol under mild reaction conditions (i.e., 220 °C, 3 MPa pressure), which outperformed most non-noble metal-based catalysts previously reported. According to the comprehensive structural characterizations and in situ diffuse reflectance infrared Fourier transform spectra of CO2/CO adsorption and CO2 hydrogenation, it was unambiguously revealed that CH x could be formed at oxygen vacancies of defective CoGaO x species, while CO could be stabilized by Cu+ species, and thus the catalytic synergistic role of Cu0/Cu+-CoGaO x interfacial sites promoted the generation of CH x and CO intermediates to participate in the CH x -CO coupling process and simultaneously inhibited alkylation reactions. The present work points out a promising new strategy for constructing CuCo-based catalysts with favorable interfacial sites for highly efficient CO2 hydrogenation to produce ethanol.

show abstract

Section: ■ Results and Discussionmentioning

confidence: 99%

Ga-Promoted CuCo-Based Catalysts for Efficient CO₂ Hydrogenation to Ethanol: The Key Synergistic Role of Cu-CoGaO_x Interfacial Sites

Zhang

Fan

Zheng

et al. 2022

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…The atmospheric distillation method ASTM D-86 is used for petroleum products and middle distillates. This method detects the boiling range for lots of different hydrocarbon distillates such as gasoline with or without oxygenates, diesel, and other light and middle distillates 37 , 38 .…”

Section: Methodsmentioning

confidence: 99%

(Co/Zn) Al2O4 nano catalyst for waste cooking oil catalytic cracking

El-Araby

Ibrahim

Abdelkader

et al. 2022

Sci Rep

View full text Add to dashboard Cite

The current work investigated the preparation of Nano-particles of Co/Zn Al2O4 as a catalyst via co-precipitation method. Several analyses, including BET, XRD, HRTEM, EDX, SEM, and FTIR, were used to characterize it. The analysis revealed that the prepared catalyst had an average surface area of 69.20 m2/g, a cross-sectional area of 16.2 m2/molecule, an average particle size of approximately 28 nm, and a pore size of 0.22 cm3/g. The prepared catalyst was used in a bio fuel synthesis process via thermo-catalytic cracking of waste cooking oil (WCO) in a single step batch reactor. Catalyst loading was tested with different weight percentage of 1.5%, 2%, and 2.5%. The pilot study revealed that the best conditions for optimizing bio jet fuel yield were 400 °C, a catalyst loading of 2%, and a reaction time of 30 min.The optimal cut-off from the distillation process of crude liquid bio fuel product which represents a fraction of bio-jet fuel was in the range from 150 to 240 °C.

show abstract

“…The catalysts commonly applied in hydrotreatment are transition metal, for example, Ni-and CO-based catalysts as good conversion can be achieved [24][25][26]. The study by Liu et al concluded that the Ni supported on a porous carbon matrix synthesized at 400 • C was able to obtain a high conversion up to 90% under reaction conditions at 320 • C, 3 MPa, and 4 h of reaction time in cyclohexane.…”

Section: Figurementioning

confidence: 99%

Indigenous Materials as Catalyst Supports for Renewable Diesel Production in Malaysia

Chia

Nomanbhay²,

Chew³

et al. 2022

Energies

View full text Add to dashboard Cite

High energy demand from the market due to the rapid increment of the human population worldwide has urged society to explore alternatives to replace non-renewable energy. Renewable diesel produced from biomass could be the next potential energy source for its high stability, long-term storage, and comparable performance with diesel fuels. In producing renewable diesel, the application of catalyst is essential, and the catalyst support is synthesized with the catalyst to enhance the reaction rate and catalytic properties. In this review, the type of catalyst support will be reviewed along with a brief introduction to biodiesel and renewable diesel production, especially focusing on zeolites as the catalyst support. The enhancement of catalyst support will be critically discussed to improve the catalytic performance of support in renewable diesel production and important aspects such as the stability and recyclability of the supported catalyst are included. The application of the supported catalyst in increasing the selectivity and yield of renewable diesel is significant, in which the catalytic properties depend on the interaction between catalyst and catalyst support. The supported catalyst as a favorable substance to assist in enhancing renewable diesel yield could lead to a sustainable and greener future for the biofuel industry in Malaysia.

show abstract

Cobalt–Alumina Coprecipitated Catalysts for Green Diesel Production

Cited by 9 publications

References 52 publications

Ga-Promoted CuCo-Based Catalysts for Efficient CO₂ Hydrogenation to Ethanol: The Key Synergistic Role of Cu-CoGaO_x Interfacial Sites

Ga-Promoted CuCo-Based Catalysts for Efficient CO₂ Hydrogenation to Ethanol: The Key Synergistic Role of Cu-CoGaO_x Interfacial Sites

(Co/Zn) Al2O4 nano catalyst for waste cooking oil catalytic cracking

Indigenous Materials as Catalyst Supports for Renewable Diesel Production in Malaysia

Contact Info

Product

Resources

About

Cobalt–Alumina Coprecipitated Catalysts for Green Diesel Production

Cited by 9 publications

References 52 publications

Ga-Promoted CuCo-Based Catalysts for Efficient CO2 Hydrogenation to Ethanol: The Key Synergistic Role of Cu-CoGaOx Interfacial Sites

Ga-Promoted CuCo-Based Catalysts for Efficient CO2 Hydrogenation to Ethanol: The Key Synergistic Role of Cu-CoGaOx Interfacial Sites

(Co/Zn) Al2O4 nano catalyst for waste cooking oil catalytic cracking

Indigenous Materials as Catalyst Supports for Renewable Diesel Production in Malaysia

Contact Info

Product

Resources

About

Ga-Promoted CuCo-Based Catalysts for Efficient CO₂ Hydrogenation to Ethanol: The Key Synergistic Role of Cu-CoGaO_x Interfacial Sites

Ga-Promoted CuCo-Based Catalysts for Efficient CO₂ Hydrogenation to Ethanol: The Key Synergistic Role of Cu-CoGaO_x Interfacial Sites