Thermocatalytic degradation of lignin monomer coniferyl aldehyde by aluminum–boron oxide catalysts

Pedroza-Solís, Celia D.; Rosa, Javier Rivera De la; Lucio–Ortiz, Carlos J.; Río, David A. De Haro Del; González-Casamachin, Diego A.; García, Tomás Constantino Hernández; Escamilla, Gerardo A. Flores; Carrillo-Pedraza, Eileen Susana; López, Iván Alonso Santos; Martínez, Diana Bustos; García-Gutiérrez, Domingo I.; Sandoval-Rangel, Ladislao

doi:10.5802/crchim.114

Cited by 5 publications

(1 citation statement)

References 25 publications

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“…Two catalysts were synthesized by the sol‐gel method at pH 3 and 4 using a mixture of alumina and boron oxide as raw materials. The synthesized catalysts yielded a variety of organic products during catalytic lignin pyrolysis, including acrolein, low weight aromatics, eugenol, and isoeugenol isomers, and aliphatic chains (10 to 14 carbons) [52] . The TiO 2 prepared by sol‐gel method showed high catalytic activity in lignin pyrolysis, and 37 % yield of guaiacol‐based products could be obtained at 500 °C, which was mainly due to a large number of hydroxyl group on its surface and suitable pore size distribution, which could promote the catalytic reaction [53] …”

Section: Chemical Catalytic Depolymerization Of Ligninmentioning

confidence: 99%

Advances in Catalytic Depolymerization of Lignin

Wan

Zhang²,

Guo

et al. 2022

ChemistrySelect

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The depletion of traditional fossil energy sources and increasing environmental concerns have sparked continued interest in the development and utilisation of renewable energy sources. Lignin is a renewable resource with an abundant aromatic ring structure and low price. However, the complex structure and low reactivity of lignin limit the development of its application. The depolymerization of lignin is considered to be an effective solution to this dilemma. The catalytic depolymerization of lignin allows the preparation of value-added fine chemicals, such as monophenols and high-grade biofuels, partially replacing some products based on petroleum resources. In order to produce biofuels and value-added chemicals on a large scale through lignin depolymerization, it is necessary to develop efficient catalysts and mature catalytic systems. This review provides an overview of recent advances in catalytic depolymerization of lignin, both in terms of biocatalytic and chemical methods, respectively. Biocatalytic methods depolymerize lignin through the action of fungi, bacteria and enzymes. Chemical methods for depolymerization of lignin include pyrolysis, acid catalysis, base catalysis, oxidative catalysis, hydrogenolysis, photocatalysis, and electrocatalysis. In addition, through a detailed discussion of catalyst types, reaction mechanisms and product properties, we summarise the current opportunities and challenges for the catalytic conversion of lignin and provide an outlook on future developments in this field.

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Section: Chemical Catalytic Depolymerization Of Ligninmentioning

confidence: 99%

Advances in Catalytic Depolymerization of Lignin

Wan

Zhang²,

Guo

et al. 2022

ChemistrySelect

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Green Synthesis of Pd–Fe Catalyst Supported on ɣ-Al2O3 Using Gobernadora Extract (Larrea tridentata) for the Hydrogenation of 2-Methylfuran to Biorefinery Products

et al. 2022

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Synthesis and Characterization of Isothiocyanate Poly(Methyl Eugenol) and Thiosemicarbazide Poly(Methyl Eugenol)

Arianie

Supriatna

Kazal

et al. 2022

MSF

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Abstract. This study investigates the synthesis, chemical, and physical properties of isothiocyanate poly(methyl eugenol) or IPME and thiosemicarbazide poly(methyl eugenol) or TPME. The IPME synthesis as a precursor was firstly carried out by reacting Methyl Eugenol (ME) with potassium hydrogen sulfate and potassium thiocyanate in chloroform solution at room temperature. The TPME was synthesized using the intermediate compound and hydrazine in an ethanol-based at 70 °C for five hours. The IPME and TPME were observed by FTIR, dissolution test, SEM-EDX, XRD, GCMS, and LCMS-MS. The methyl eugenol : HSCN = 1:10 (mmol) ratio for 30 hours of reaction time was determined for the optimum IPME production. FTIR spectra consecutively identified specific wavenumbers at around 2049 cm-1 and 3488 cm-1 for isothiocyanate and thiosemicarbazide functional groups. IPME and TPME compounds were entirely soluble in DMSO and slightly soluble in n-hexane. SEM-EDX study showed that IPME had a denser surface than TPME; however, they all consisted of Carbon, Oxygen, Nitrogen, and Sulfur elemental composition. XRD analysis indicates that these two products were high and moderate crystalline compounds. The GCMS analysis showed m/z 503 for IPME, predicting that IPME was a copolymer composed of one methyl eugenol isothiocyanate molecule and two methyl eugenol bonded. The LCMS-MS chromatogram with m/z 449 for TPME proved the occurrence of a polymerization reaction.Keywords: Isothiocyanate, methyl eugenol, thiosemicarbazide.

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Thermocatalytic degradation of lignin monomer coniferyl aldehyde by aluminum–boron oxide catalysts

Cited by 5 publications

References 25 publications

Advances in Catalytic Depolymerization of Lignin

Advances in Catalytic Depolymerization of Lignin

Green Synthesis of Pd–Fe Catalyst Supported on ɣ-Al2O3 Using Gobernadora Extract (Larrea tridentata) for the Hydrogenation of 2-Methylfuran to Biorefinery Products

Synthesis and Characterization of Isothiocyanate Poly(Methyl Eugenol) and Thiosemicarbazide Poly(Methyl Eugenol)

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