Hydrotreatment of lignin dimers over NiMoS-USY: effect of silica/alumina ratio

Salam, Muhammad Abdus; Cheah, You Wayne; Ho, Phuoc Hoang; Olsson, Louise; Creaser, Derek

doi:10.1039/d1se00412c

Cited by 25 publications

(7 citation statements)

References 65 publications

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“…In addition, the hydrogenation of PEB aromatic rings was not observed [11]. In the case of this ether, the alkylation of PEB was only reported in a few works [14,31].…”

Section: Introductionmentioning

confidence: 88%

“…The PEB conversion over bare oxides has indeed been reported in the literature in a non-polar solvent under high hydrogen pressure and temperature. Over Hβ (493 K, 40 bar H 2 ) [14] and USY (618 K and 50 bar H 2 ) [31], zeolites, phenol, and alkylated products (2, 3, and 4-PPE) were the main products observed after PEB cleavage in dodecane. The authors proposed that the cleavage of PEB occurred by H+ addition to produce phenol and 2-phenyleth-1-ylium intermediates, which can attack phenol at the ortho, meta, or para positions to form 2, 3, and 4-PPE, respectively, via a transalkylation reaction catalyzed over the acidic sites.…”

Section: Phenethoxybenzene (Peb)mentioning

confidence: 99%

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Conversion of Dimeric Diaryl Ethers over SiO2- and HZSM5-Supported Pd and Ru Catalysts: A Focus on the Role of the Metal and Acidity

et al. 2023

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The effect of metal and support acidity on the hydroconversion of dimeric aryl ethers, used as model molecules for lignin, is still under debate, both in terms of hydrogenolysis (cleavage of the ether bond) and formation of by-products (coupling of aromatic monomers to dimers by alkylation reaction). Their role is investigated here in the conversion of three typical molecules representative of the α-O-4, β-O-4, and 4-O-5 ether linkages of lignin, respectively, benzyl phenyl ether (BPE), phenethoxybenzene (PEB), and diphenyl ether (DPE), at 503 K, under 18 bar of H2 in decalin. Ru- and Pd-based catalysts were synthesized on non-acidic SiO2 and on acidic HZSM5. Under these reaction conditions, the conversion of the ethers over the bare supports was observed in the presence of acidic sites; the effect decreased as the ether bond strength increased. The results also suggest that the product distribution is directly affected both by the support acidity and by the oxophilicity of Ru. Alkylated products from isomerization reactions, which are reported to be formed only over acidic sites, were also produced on the surface of the Ru nanoparticles.

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“…In addition, the hydrogenation of PEB aromatic rings was not observed [11]. In the case of this ether, the alkylation of PEB was only reported in a few works [14,31].…”

Section: Introductionmentioning

confidence: 88%

Section: Phenethoxybenzene (Peb)mentioning

confidence: 99%

Conversion of Dimeric Diaryl Ethers over SiO2- and HZSM5-Supported Pd and Ru Catalysts: A Focus on the Role of the Metal and Acidity

et al. 2023

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“…NH 3 -TPD (temperature-programmed desorption) and H 2 -TPR (temperature-programmed reduction) measurements were performed using a setup described in our previous work. 41,42…”

Section: Methodsmentioning

confidence: 99%

One-pot reductive liquefaction of sawdust to renewables over MoO_x–Al₂O₃ variants: insight into structure–activity relationships

Salam,

Tran,

et al. 2024

Sustainable Energy Fuels

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“…The FCC catalyst is a kind of porous, microsphere granular solid acid catalyst, which is made of active components (Y and ZSM-5 molecular sieve), matrix (kaolin), and binder (silica, alumina, etc.) by spray drying [ 22 , 23 ]. Kaolin, silica, and other substances are the main additives in rubber.…”

Section: Introductionmentioning

confidence: 99%

Study on the Mechanism and Experiment of Styrene Butadiene Rubber Reinforcement by Spent Fluid Catalytic Cracking Catalyst

et al. 2023

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Spent Fluid Catalytic Cracking (FCC) Catalyst is a major waste in the field of the petroleum processing field, with a large output and serious pollution. The treatment cost of these waste catalysts is high, and how to achieve their efficient reuse has become a key topic of research at home and abroad. To this end, this paper conducted a mechanistic and experimental study on the replacement of some carbon blacks by spent FCC catalysts for the preparation of rubber products and explored the synergistic reinforcing effect of spent catalysts and carbon blacks, in order to extend the reuse methods of spent catalysts and reduce the pollution caused by them to the environment. The experimental results demonstrated that the filler dispersion and distribution in the compound are more uniform after replacing the carbon black with modified spent FCC catalysts. The crosslinking density of rubber increases, the Payne effect is decreased, and the dynamic mechanical properties and aging resistance are improved. When the number of replacement parts reached 15, the comprehensive performance of the rubber composites remained the same as that of the control group. In this paper, the spent FCC catalysts modified by the physical method instead of the carbon-black-filled SBR can not only improve the performance of rubber products, but also can provide basic technical and theoretical support to realize the recycling of spent FCC catalysts and reduce the environmental pressure. The feasibility of preparing rubber composites by spent catalysts is also verified.

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Hydrotreatment of lignin dimers over NiMoS-USY: effect of silica/alumina ratio

Abstract: Sulfides of NiMo over a series of commercial ultra-stable Y zeolites were studied in an autoclave reactor to elucidate the effect of Silica/Alumina ratio (SAR=12, 30, and 80) on the...

Cited by 25 publications

References 65 publications

Conversion of Dimeric Diaryl Ethers over SiO2- and HZSM5-Supported Pd and Ru Catalysts: A Focus on the Role of the Metal and Acidity

Conversion of Dimeric Diaryl Ethers over SiO2- and HZSM5-Supported Pd and Ru Catalysts: A Focus on the Role of the Metal and Acidity

One-pot reductive liquefaction of sawdust to renewables over MoO_x–Al₂O₃ variants: insight into structure–activity relationships

Study on the Mechanism and Experiment of Styrene Butadiene Rubber Reinforcement by Spent Fluid Catalytic Cracking Catalyst

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Hydrotreatment of lignin dimers over NiMoS-USY: effect of silica/alumina ratio

Abstract: Sulfides of NiMo over a series of commercial ultra-stable Y zeolites were studied in an autoclave reactor to elucidate the effect of Silica/Alumina ratio (SAR=12, 30, and 80) on the...

Cited by 25 publications

References 65 publications

Conversion of Dimeric Diaryl Ethers over SiO2- and HZSM5-Supported Pd and Ru Catalysts: A Focus on the Role of the Metal and Acidity

Conversion of Dimeric Diaryl Ethers over SiO2- and HZSM5-Supported Pd and Ru Catalysts: A Focus on the Role of the Metal and Acidity

One-pot reductive liquefaction of sawdust to renewables over MoOx–Al2O3 variants: insight into structure–activity relationships

Study on the Mechanism and Experiment of Styrene Butadiene Rubber Reinforcement by Spent Fluid Catalytic Cracking Catalyst

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One-pot reductive liquefaction of sawdust to renewables over MoO_x–Al₂O₃ variants: insight into structure–activity relationships