Cocoa shell-deriving hydrochar modified through aminosilane grafting and cobalt particle dispersion as potential carbon dioxide adsorbent

Vieillard, Julien; Bouazizi, Nabil; Bargougui, R.; Brun, Nicolas; Nkuigue, P. Fotsing; Oliviero, E.; Thoumire, Olivier; Couvrat, Nicolas; Woumfo, Emmanuel Djoufac; Ladam, Guy; Mofaddel, Nadine; Azzouz, Abdelkrim; Derf, Franck Le

doi:10.1016/j.cej.2018.02.084

Cited by 29 publications

(20 citation statements)

References 62 publications

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“…1065 cm −1 and smaller one around 800 cm −1 ( Figs. 4 , S1 and S2) providing clear evidence of ClPTES grafting but accompanied by an unavoidable self-condensation of the triethethoxysilane groups [35,44,45] . The appearance of the 3440-3700 and 1674 cm −1 bands assigned to the N -H stretching vibration and NH 2 bending vibration, respectively was attributed to amine grafting [46,47] .…”

Section: Evidence Of Metal Stabilizationmentioning

confidence: 98%

“…Metal oxides, and more particularly zinc oxide (ZnO) are also assumed to exhibit interesting surface properties as adsorbent [29,30] and electronic material [31] . ZnO combination with a diethanolamine-modified cocoa shell-deriving hydrochar already showed interesting surface properties [32][33][34][35] . It turned out to act as host matrice for copper-zero dispersion and as effective adsorbent for CO 2 at room temperature like other materials with attenuated basicity [15] .…”

Section: Article In Pressmentioning

confidence: 99%

“…Hence, a new strategy was rather focused on the preparation of compacted matrices that promote metal stabilization and attenuate CO 2 retention strength. Strong metal: matrice interaction is expected to attenuate the Lewis basicity of the N atom of the organic moiety [35] , and, subsequently, CO 2 capture will mainly occur via purely physical gas condensation, that favors with easy release upon forced convection or under lower pressure. The material interactions with both metal particles and CO 2 were deeply examined herein as specific objectives of this work.…”

Section: Article In Pressmentioning

confidence: 99%

“…This was achieved using an appropriate device containing dry air-free nitrogen according to a specific procedure fully described elsewhere [35] . Triplicate CO 2 adsorption tests were carried out within a 20 mL sealed enclosure at 292 K and normal pressure.…”

Section: Co 2 Adsorption Tests and Kineticsmentioning

confidence: 99%

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Metal-inorganic-organic core–shell material as efficient matrices for CO2 adsorption: Synthesis, properties and kinetic studies

Vieillard

Bargougui

Fotsing

et al. 2019

Journal of the Taiwan Institute of Chemical Engineers

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A novel hydrochar-based core-shell material with improved affinity towards CO 2 was synthesized through encapsulation within ZnO shell, followed by chemical grafting to an organic moiety bearing terminal diethanolamino groups and further dispersion of Cu 0 nanoparticles. Characterization through nitrogen adsorption-desorption isotherms with BET and BJH models, SEM, TEM, zeta potential measurements, FTIR spectroscopy, DSC and XPS analyses revealed a strong influence of the modification procedure on the performance of each material in CO 2 adsorption. The resulting metal-inorganic-organic-core-shell (MIOCS) displayed compacted structure with a wide pore size distribution that imposes intraparticle diffusion as a kinetic-controlling step. Cu-MIOCS showed an appreciable CO 2 retention capacity of 5.42 mmol/g compared to many adsorbents reported so far. This affinity towards CO 2 was explained in terms of physical and non-stoichiometric CO 2 condensation. This finding is of great importance, because it demonstrates that judicious modifications of vegetal-deriving wastes such as woods and other biomasses give rise to added-value materials as low cost and efficient gas adsorbents with high affinity towards CO 2 .

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Section: Evidence Of Metal Stabilizationmentioning

confidence: 98%

Section: Article In Pressmentioning

confidence: 99%

Section: Article In Pressmentioning

confidence: 99%

Section: Co 2 Adsorption Tests and Kineticsmentioning

confidence: 99%

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Metal-inorganic-organic core–shell material as efficient matrices for CO2 adsorption: Synthesis, properties and kinetic studies

Vieillard

Bargougui

Fotsing

et al. 2019

Journal of the Taiwan Institute of Chemical Engineers

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“…In the search of new materials with enhanced properties, hydrothermal carbonization (HTC) methods affording non‐porous and spherically‐shaped hydrochars enriched with sulfonic, amino, aminopropyltriethoxysilane or ethylenediamino groups have been reported involving renewable biomass as carbon precursors . Up to now, the presence of multiple functional groups on the surface of the hydrochars has limited their chemoselective functionalization .…”

Section: Introductionmentioning

confidence: 99%

Tetraalkylammonium Functionalized Hydrochars as Efficient Supports for Palladium Nanocatalysts

et al. 2020

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With the aim of preparing bio-sourced supports with enhanced properties in catalysis, we devised an original strategy allowing the immobilization of metal nanoparticles. Thus, size-controlled hydrochars with a high degree of hydroxyl functionalities, from both neat sucrose or modified with acrylic acid (10 wt.%), were derivatized with ether linkers containing ammonium groups. These non-porous carbon-based materials were used as suitable supports for the immobilization of palladium nanoparticles. The catalytic materials were synthesized by reduction of Pd(OAc) 2 to Pd(0) under H 2 atmosphere in the presence of the corresponding hydrochar, and fully characterized by standard methods. Among the different hydrochar-supported palladium materials, those functionalized with tetraalkylammonium groups afforded heterogeneous catalysts, exhibiting high activity in hydrogenations of different types of substrates (alkynes, alkenes, and carbonyl and nitro derivatives). The most efficient catalyst was recycled up to ten runs without loss of catalytic behavior, in agreement with the unchanged composite materials after catalysis (Transmission Electron Microscopy (TEM) analyses) and the lack of metal leaching in the extracted organic products (no palladium detected by Inductively Coupled Plasma-Atomic Emission Spectrometry (ICP-AES)); these systems exhibited enhanced recyclability properties as compared to commercial Pd/C catalyst.

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Bio/hydrochar Sorbents for Environmental Remediation

Zhang

Wang

Cai

et al. 2020

Energy & Environ Materials

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An increasing global population and current societal reliance on fossil fuel resources has precipitated an ongoing crisis at the energy-materials-environment nexus. Sustainable resources are required to meet the demands of developed and emerging economies while mitigating climate change and protecting the biosphere; this has promoted the "zero-waste economy" and "trash-to-treasure strategy" concepts. [1] Achieving such ambitious goals necessitates a transition from fossil resources to renewables such as nuclear, solar, wind, and wave power, and biomass. Lignocellulosic biomass, such as agricultural and forestry residues, crops, and wood, is the most abundant (inedible to humans) biomass resource and a potential low-carbon feedstock to partially replace fossil carbon. It comprises cellulose and hemicellulose carbohydrate polymers embedded in a lignin matrix. [2] Lignin is a three-dimensional network of polyaromatic alcohols, whose upgrading can offer routes to renewable valueadded chemicals. [3] Hemicellulose comprises pentose (predominantly xylose) and hexose units connected by glycosidic bonds. Cellulose is a water insoluble, linear polysaccharide formed from glucose units linked via b-1,4-glycosidic bonds. [4] As an important renewable feedstock, biomass, and its conversion to materials, chemicals, and fuels is intensively researched. [5] Biomass conversion may occur through non-catalytic (thermo)chemical routes, e.g., pyrolysis and hydrothermal processing, and/or catalytic (bio)chemical routes, e.g., homogeneous, heterogeneous, and enzymatic catalyzed processes [3,6] (Figure 1). Bio/hydrochars are an important class of solid materials obtainable from biomass due to their applications as adsorbents and catalysts, and as precursors to activated carbons and other functional materials. [7] Bio/hydrochars and activated carbons are all pyrogenic materials, i.e., produced by thermochemical conversion and containing some organic carbon. Activated carbons may derive from any carbon source (fossil, waste, or renewable) and irrespective of sustainability concerns, whereas biochars are (now) viewed as pyrogenic materials derived from sustainably sourced biomass and not used as a fuel. [8] Activated carbons are amorphous and non-graphitic, with high surface areas and (usually) microporosity and a small proportion of hydrogen or oxygen, whereas biochars, and particularly hydrochars, often possess a higher oxygen content. A few studies refer to biochars as pyrochars (being derived by pyrolysis of biomass) and/or conflate the terms pyrochar and hydrochar under the banner of biochars. [9] In this review, we follow widely adopted literature conventions for char definitions [7c,10] : biochar is a carbon-rich, porous solid produced by biomass pyrolysis under restricted oxygen and moderate temperatures (350-700°C), whereas

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Cocoa shell-deriving hydrochar modified through aminosilane grafting and cobalt particle dispersion as potential carbon dioxide adsorbent

Cited by 29 publications

References 62 publications

Metal-inorganic-organic core–shell material as efficient matrices for CO2 adsorption: Synthesis, properties and kinetic studies

Metal-inorganic-organic core–shell material as efficient matrices for CO2 adsorption: Synthesis, properties and kinetic studies

Tetraalkylammonium Functionalized Hydrochars as Efficient Supports for Palladium Nanocatalysts

Bio/hydrochar Sorbents for Environmental Remediation

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