Activity and characterization of Ni catalyst supported on CeO2–ZrO2 for thermo-chemical conversion of cellulose

Grams, Jacek; Niewiadomski, Michał; Ryczkowski, Robert; Ruppert, Agnieszka M.; Kwapiński, Witold

doi:10.1016/j.ijhydene.2015.11.140

Cited by 24 publications

(11 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Ni/CeO 2 -ZrO 2 catalyst possessed enhanced redox properties and resistance against coke deposition. Same conclusions were obtained in our previous work devoted to investigations of Ni/CeO 2 -ZrO 2 catalyst in the high-temperature conversion of cellulose [16]. Our results suggested that the reduction of catalyst deactivation rate can be related to the presence of Ce 3+ species on the surface of the catalyst.…”

Section: Introductionsupporting

confidence: 89%

See 1 more Smart Citation

Impact of Support (MCF, ZrO2, ZSM-5) on the Efficiency of Ni Catalyst in High-Temperature Conversion of Lignocellulosic Biomass to Hydrogen-Rich Gas

et al. 2019

Self Cite

View full text Add to dashboard Cite

The main objective of this work was to evaluate an impact of a support on the efficiency of nickel catalysts in the high-temperature conversion of lignocellulosic biomass to hydrogen-rich gas. The most important parameters influencing catalytic performance of the catalysts were identified. The properties of three materials (ZSM-5, ZrO2, and MCF (mesostructured cellular foam)) used as a support differing in surface acidity, surface area, pore structure, ability to interact with an active phase, and resistance to coking, have been studied. The results revealed that Ni/MCF, characterized by large pore size and pore volume, low acidity, small NiO crystallites size, and moderate interaction with the active phase, is the most efficient among studied catalysts, while an application of Ni on ZSM-5 support with high-acidity was not beneficial. The results suggest that structure of the support, in particular larger pore size and a better contact between an active phase and reaction intermediates, play an important role in the formation of gaseous products during thermal decomposition of lignocellulosic feedstock. On the other hand, high acidity of the support did not increase the formation of large amounts of hydrogen-rich gaseous products.

show abstract

Section: Introductionsupporting

confidence: 89%

“…However, in the case of the most acidic Ni/ZSM-5 catalyst, this process was observed only between 80 °C and 200 °C. High acidity of catalysts supported on ZSM-5 in comparison to MCF [41] and ZrO 2 [16] has been previously observed in Reference [42].…”

Section: Resultsmentioning

confidence: 76%

Impact of Support (MCF, ZrO2, ZSM-5) on the Efficiency of Ni Catalyst in High-Temperature Conversion of Lignocellulosic Biomass to Hydrogen-Rich Gas

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…Various catalytic systems are used to overcome these imperfections [34]. CeO 2 is often used as a catalyst in the catalytic conversions of lignocellulosic raw materials [35][36][37][38][39][40]. Its catalytic properties are attributed to the ease with which it alternates between the 3+ and 4+ oxidation states, depending on the environmental conditions.…”

Section: Introductionmentioning

confidence: 99%

Catalytic Pyrolysis of Lignin Model Compounds (Pyrocatechol, Guaiacol, Vanillic and Ferulic Acids) over Nanoceria Catalyst for Biomass Conversion

et al. 2021

View full text Add to dashboard Cite

Understanding the mechanisms of thermal transformations of model lignin compounds (MLC) over nanoscale catalysts is important for improving the technologic processes occurring in the pyrolytic conversion of lignocellulose biomass into biofuels and value-added chemicals. Herein, we investigate catalytic pyrolysis of MLC (pyrocatechol (P), guaiacol (G), ferulic (FA), and vanillic acids (VA)) over nanoceria using FT-IR spectroscopy, temperature-programmed desorption mass spectrometry (TPD MS), and thermogravimetric analysis (DTG/DTA/TG). FT-IR spectroscopic studies indicate that the active groups of aromatic rings of P, G, VA, and FA as well as carboxylate groups of VA and FA are involved in the interaction with nanoceria surface. We explore the general transformation mechanisms of different surface complexes and identify their decomposition products. We demonstrate that decomposition of carboxylate acid complexes occurs by decarboxylation. When FA is used as a precursor, this reaction generates 4-vinylguaiacol. Complexes of VA and FA formed through both active groups of the aromatic ring and decompose on the CeO2 surface to generate hydroxybenzene. The formation of alkylated products accompanies catalytic pyrolysis of acids due to processes of transalkylation on the surface.

show abstract

“…On the other hand, it is reported that the use of cerium may lead to a significant decrease in surface area of the modified catalyst. This may lead to a decrease in the dispersion of the active phase and due to that, a drop in the efficiency of the conversion process [38].…”

Section: Formation Of Coke Depositmentioning

confidence: 99%

Catalyst Stability—Bottleneck of Efficient Catalytic Pyrolysis

Grams

Ruppert

2021

Catalysts

Self Cite

View full text Add to dashboard Cite

The pyrolysis of lignocellulosic biomass is one of the most promising methods of alternative fuels production. However, due to the low selectivity of this process, the quality of the obtained bio-oil is usually not satisfactory and does not allow for its direct use as an engine fuel. Therefore, there is a need to apply catalysts able to upgrade the composition of the mixture of pyrolysis products. Unfortunately, despite the increase in the efficiency of the thermal decomposition of biomass, the catalysts undergo relatively fast deactivation and their stability can be considered a bottleneck of efficient pyrolysis of lignocellulosic feedstock. Therefore, solving the problem of catalyst stability is extremely important. Taking that into account, we presented, in this review, the most important reasons for catalyst deactivation, including coke formation, sintering, hydrothermal instability, and catalyst poisoning. Moreover, we discussed the progress in the development of methods leading to an increase in the stability of the catalysts of lignocellulosic biomass pyrolysis and strengthening their resistance to deactivation.

show abstract

Activity and characterization of Ni catalyst supported on CeO2–ZrO2 for thermo-chemical conversion of cellulose

Cited by 24 publications

References 56 publications

Impact of Support (MCF, ZrO2, ZSM-5) on the Efficiency of Ni Catalyst in High-Temperature Conversion of Lignocellulosic Biomass to Hydrogen-Rich Gas

Impact of Support (MCF, ZrO2, ZSM-5) on the Efficiency of Ni Catalyst in High-Temperature Conversion of Lignocellulosic Biomass to Hydrogen-Rich Gas

Catalytic Pyrolysis of Lignin Model Compounds (Pyrocatechol, Guaiacol, Vanillic and Ferulic Acids) over Nanoceria Catalyst for Biomass Conversion

Catalyst Stability—Bottleneck of Efficient Catalytic Pyrolysis

Contact Info

Product

Resources

About