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1. The role of Nb2O5 in controlling metal-acid sites of CoMoS/γ-Al2O3 catalyst for the enhanced hydrodeoxygenation of guaiacol into hydrocarbons

Author:
Yanlin Xu; Wenhong Wang; Bin Liu; Yuan Pan; Bin Dong; Yichuan Li; Yanpeng Li; Hailing Guo; Yongming Chai; Chenguang Liu
Source:
Journal of catalysis 2022 v.407 pp. 19-28
ISSN:
0021-9517
Subject:
guaiacol,   etc   ; benzene; catalysts; catalytic activity; feedstocks; lignin;     Show all 6 Subjects
Abstract:
... Transformation of lignin-derived feedstocks into valuable hydrocarbons is of significant importance but still challenging. Herein, we report a novel and highly efficient bifunctional metal/acid CoMoS/γ-Al₂O₃ catalyst with doping of Nb₂O₅ for the hydrodeoxygenation of guaiacol. The dopant Nb₂O₅ significantly improves the HDO activity of CoMoS/γ-Al₂O₃ catalyst from 72.4% to 97.5% at 340 °C. Extensiv ...
DOI:
10.1016/j.jcat.2022.01.027

2. An integrated process for the valorization of corn stover promoted by NaCl in a GVL/H₂O system

Author:
Yiping Luo; Zhichen Zhao; Bin Jiang; Min Wei; Zheng Zhang; Lisha Zeng; James H. Clark; Jiajun Fan
Source:
Green chemistry 2022 v.24 no.4 pp. 1515-1526
ISSN:
1463-9270
Subject:
guaiacol,   etc   ; corn stover; decarboxylation; eugenol; green chemistry; hemicellulose; lignin; liquids; pollution control; steam;     Show all 10 Subjects
Abstract:
... An integrated green process for the valorization of corn stover promoted by NaCl in GVL/H₂O was developed. With the addition of NaCl in 25% GVL/H₂O at 170 °C for 2 h, the interactions of NaCl (Na⁺ and Cl⁻) with the –OH group in hemicellulose and G units in lignin were enhanced, which facilitated a high extraction of hemicellulose (96.4 wt%) and lignin (86.6 wt%), obtaining cellulose-rich solid res ...
DOI:
10.1039/d1gc03999g

3. A highly dispersed Ni3P/HZSM-5 catalyst for hydrodeoxygenation of phenolic compounds to cycloalkanes

Author:
Zhiquan Yu; Yao Wang; Guoqiang Zhang; Zhichao Sun; Ying-Ya Liu; Chuan Shi; Wei Wang; Anjie Wang
Source:
Journal of catalysis 2022 v.410 pp. 294-306
ISSN:
0021-9517
Subject:
guaiacol,   etc   ; adsorption; aqueous solutions; catalysts; catalytic activity; heat treatment; hydrogenation; nickel; particle size; phenol;     Show all 10 Subjects
Abstract:
... A highly dispersed Ni₃P/HZSM-5 catalyst was prepared by deposition-precipitation of Ni species followed by electroless plating and thermal treatment, and characterized by means of XRD, ICP, N₂ physical adsorption, TEM, XPS, NH₃-TPD, and CO chemisorption. Electroless plating reaction takes place in an aqueous solution under mild conditions, facilitating the high dispersion of the formed Ni₃P partic ...
DOI:
10.1016/j.jcat.2022.04.024

4. An efficient way to synthesize biomass-based molybdenum carbide catalyst via pyrolysis carbonization and its application for lignin catalytic pyrolysis

Author:
Jiajun Yu; Bingbing Luo; Yihan Wang; Siyu Wang; Kai Wu; Chao Liu; Sheng Chu; Huiyan Zhang
Source:
Bioresource technology 2022 v.346 pp. 126640
ISSN:
0960-8524
Subject:
guaiacol,   etc   ; biomass; carbon; carbonization; catalysts; heat; hydrogen; lignin; molybdenum; pyrolysis; rapid methods; technology; vapors;     Show all 13 Subjects
Abstract:
... In this study, a simple and rapid method was proposed to synthesize orthorhombic α-Mo₂C as catalyst for lignin catalytic pyrolysis. Biomass in-situ pyrolysis products were used as the carbon source and supporter, the carbonization of Mo precursor was realized under rapid heating. Experimental results show that Pine-Mo₂C catalyst can achieve lignin pyrolysis vapor bond breaking and deoxidation unde ...
DOI:
10.1016/j.biortech.2021.126640

5. Production of oxygen-containing fuels via supercritical methanol hydrodeoxygenation of lignin bio-oil over Cu/CuZnAlOx catalyst

Author:
Xiangchen Kong; Chao Liu; Xing Wang; Yuyang Fan; Weicong Xu; Rui Xiao
Source:
Applied energy 2022 v.316 pp. 119129
ISSN:
0306-2619
Subject:
guaiacol,   etc   ; acidity; biorefining; carbon; catalysts; catalytic activity; corn cobs; energy; hydrogenation; lignin; methanol; oxidation; profitability; pyrolysis oils;     Show all 14 Subjects
Abstract:
... Practical, economical, and high-selectivity methods of lignin bio-oil upgrading could greatly increase biorefinery productivity and profitability. Herein, we report the efficient production of oxygen-containing fuel via supercritical methanol hydrodeoxygenation (SCM-HDO) of lignin bio-oil with a well-defined Cu/CuZnAlOₓ catalyst. The fuel range cyclic alcohols were majorly produced from guaiacol a ...
DOI:
10.1016/j.apenergy.2022.119129

6. HS-SPME Combined with GC-MS/O to Analyze the Flavor of Strong Aroma Baijiu Daqu

Author:
Zhe Wang; Song Wang; Pengfei Liao; Lu Chen; Jinyuan Sun; Baoguo Sun; Dongrui Zhao; Bowen Wang; Hehe Li
Source:
Foods 2022 v.11 no.1 pp. -
ISSN:
2304-8158
Subject:
guaiacol,   etc   ; flavor; odors; phenol; quantitative analysis;     Show all 5 Subjects
Abstract:
... Daqu has gained wide attention because it is an essential source of microorganisms and flavor in baijiu production. In this study, HS-SPME combined with GC-MS/O was used to analyze the volatile flavor components of Strong aroma baijiu Daqu. DI-GC-O was used to choose the best extraction fiber to extract the representative overall aroma profile of Daqu. A total of 139 compounds were identified in t ...
DOI:
10.3390/foods11010116

7. Electrocatalytic hydrogenation of lignin monomer to methoxy-cyclohexanes with high faradaic efficiency

Author:
Miao Wang; Tao Peng; Chenxin Yang; Baiyao Liang; Henan Chen; Mohan Kumar; Yun Zhang; Wei Zhao
Source:
Green chemistry 2022 v.24 no.1 pp. 142-146
ISSN:
1463-9270
Subject:
guaiacol,   etc   ; feedstocks; green chemistry; hydrogenation; lignin;     Show all 5 Subjects
Abstract:
... Developing efficient renewable electrocatalytic processes in chemical manufacturing is of commercial interest, especially from biomass-derived feedstock. Selective electrocatalytic hydrogenation (ECH) of biomass-derived lignin monomers to high-value oxygen-functional compounds is promising towards achieving this goal. However, ECH has to date lacked the satisfied selectivity to upgrade lignin mono ...
DOI:
10.1039/d1gc03523a

8. Upgrading of biomass-derived bio-oil via catalytic hydrogenation with Rh and Pd catalysts

Author:
Yifeng He; Ronghou Liu; Dominic Yellezuome; Wanxi Peng; Meisam Tabatabaei
Source:
Renewable energy 2022 v.184 pp. 487-497
ISSN:
0960-1481
Subject:
guaiacol,   etc   ; biofuels; carbon; catalysts; hydrogenation; liquids; oxygen;     Show all 7 Subjects
Abstract:
... The high oxygen content of biomass-derived bio-oil, a multi-component organic, has limited its application as liquid fuels. Oxygen removal from crude bio-oil by catalytic hydrogenation is an upgrading approach with huge potential to produce second-generation biofuels. In light of that, the present work mainly focuses on upgrading biomass-derived bio-oil via catalytic hydrogenation. Accordingly, a ...
DOI:
10.1016/j.renene.2021.11.114

9. Valorization potential of technical lignins from Norway spruce (Picea abies) via pyrolysis

Author:
Maryam Ghalibaf; Raimo Alén; Idoia Hita; Peter J. Deuss; Hero Jan Heeres; Paul de Wild
Source:
Journal of analytical and applied pyrolysis 2022 pp. 105549
ISSN:
0165-2370
Subject:
guaiacol,   etc   ; Picea abies; lignin; prediction; pyrolysis; Norway;     Show all 6 Subjects
Abstract:
... Analytical pyrolysis (Py-GC/MS) on mg-scale of Norway spruce (Picea abies)-derived kraft lignin, ethanosolv lignin, and dried lignin-rich soda-anthraquinone (AQ) black liquors was studied at 500 ˚C to compare the valorization potential of these materials, focusing on the type and yield of condensable pyrolysis products. Of particular interest was the relatively selective formation of guaiacol (2-m ...
DOI:
10.1016/j.jaap.2022.105549

10. Molecular modeling, docking and dynamic studies of fungal DyPs to determine substrate specificity for an efficient lignin biodegradation towards bioethanol production

Author:
Subhashree Rath; Manish Paul; Hrudayanath Thatoi
Source:
Bioresource technology reports 2022 v.18 pp. 101036
ISSN:
2589-014X
Subject:
guaiacol,   etc   ; Exidia; Mycena; active sites; biodegradation; catalytic activity; catechol; computer simulation; ethanol production; fungi; lignin; molecular dynamics; peroxidase; substrate specificity;     Show all 14 Subjects
Abstract:
... Dye-decolourizing peroxidase (DyP) is a heme-containing peroxidase well-known for its ligninolytic activity having great potential in the field of biotechnology towards efficient lignin degradation and valorisation. In the present investigation, an in silico modeling and docking of fungal DyPs from Mycena epipterygia, Exidia glandulosa, and Mycentinis scorodonius with substrates ABTS, VA, catechol ...
DOI:
10.1016/j.biteb.2022.101036

11. Guaiacol hydrotreating with in-situ generated hydrogen over ni/modified zeolite supports

Author:
Lingyu Tai; Roya Hamidi; Benedetta de Caprariis; Martina Damizia; Laura Paglia; Marco Scarsella; Ramin Karimzadeh; Paolo De Filippis
Source:
Renewable energy 2022 v.182 pp. 647-658
ISSN:
0960-1481
Subject:
guaiacol,   etc   ; active sites; alkali treatment; benzene; catalysts; catalytic activity; cyclohexanones; hydrogen; mass transfer; oxidation; phenol; renewable energy sources; zeolites; zinc oxide;     Show all 14 Subjects
Abstract:
... Catalytic hydrotreating of guaiacol as a model compound was investigated using bifunctional catalysts constituted of Ni supported on chemically modified zeolites with increased mesoporosity. In the reaction conditions, the hydrogen required for the process was generated in situ by the Zn–H₂O redox system, which represents a promising green alternative to the use of gaseous hydrogen. The guaiacol h ...
DOI:
10.1016/j.renene.2021.10.048

12. Improved laccase production in Pleurotus djamor RP by atmospheric and room temperature plasma (ARTP) mutagenesis

Author:
Zichen Zhang; Aabid Manzoor Shah; Hassan Mohamed; Yao Zhang; Beenish Sadaqat; Nino Tsiklauri; Tinatin Sadunishvili; Yuanda Song
Source:
Electronic Journal of Biotechnology 2022 v.58 pp. 1-9
ISSN:
0717-3458
Subject:
guaiacol,   etc   ; Pleurotus djamor; ambient temperature; atmospheric pressure; biotechnology; genetic stability; laccase; lignocellulose; liquid state fermentation; mushrooms; mutagenesis; mutants; protoplasts; solid state fermentation; wastes;     Show all 15 Subjects
Abstract:
... Pleurotus djamor is an edible mushroom with medicinal properties, and degrades lignocellulose by producing enzymes that have a variety of industrial applications. The aim of this study was to improve laccase producing potential of P. djamor that may easily convert lignocellulose waste into high-value products. In the present study, protoplast of the newly isolated fungus P. djamor RP was mutated b ...
DOI:
10.1016/j.ejbt.2022.03.005

13. Hydrodeoxygenation of guiacol over ion-exchanged ruthenium ZSM-5 and BEA zeolites

Author:
Penghui Yan; Eric Kennedy; Michael Stockenhuber
Source:
Journal of catalysis 2021 v.396 pp. 157-165
ISSN:
0021-9517
Subject:
guaiacol,   etc   ; adsorption; catalysts; catalytic activity; cyclohexanes; hydrogenation; oxygen; ruthenium; zeolites;     Show all 9 Subjects
Abstract:
... Ion exchanged Ru/ZSM-5 and Ru/BEA catalysts, prepared by replacing the extra framework NH₄⁺ cations in zeolites with Ru³⁺ ions, are employed for the hydrodeoxygenation of guaiacol. The performance results indicate ion-exchanged Ru zeolites, with extremely low Ru contents (~0.2 wt%), possess a high intrinsic HDO activity compared to the catalysts prepared by the incipient wetness impregnation metho ...
DOI:
10.1016/j.jcat.2021.02.013

14. Structure of dye-decolorizing peroxidase from Bacillus subtilis in complex with veratryl alcohol

Author:
Poonam Dhankhar; Vikram Dalal; Vishakha Singh; Ashwani Kumar Sharma; Pravindra Kumar
Source:
International journal of biological macromolecules 2021 v.193 pp. 601-608
ISSN:
0141-8130
Subject:
guaiacol,   etc   ; Bacillus subtilis; biodegradation; crystal structure; heme; lignin; oxidation; peroxidase;     Show all 8 Subjects
Abstract:
... Dye-decolorizing peroxidases (DyPs) are heme-containing peroxidases, which have promising application in biodegradation of phenolic lignin compounds and in detoxification of dyes. In this study, the crystal structure of BsDyP- veratryl alcohol (VA) complex delves deep into the binding of small substrate molecules within the DyP heme cavity. The biochemical analysis shows that BsDyP oxidizes the VA ...
DOI:
10.1016/j.ijbiomac.2021.10.100

15. Assessing a commercial steam methane reforming catalyst for tar removal in biomass gasification

Author:
Andrew McFarlan; Nicola Maffei
Source:
Bioresource technology reports 2022 v.17 pp. 100968
ISSN:
2589-014X
Subject:
guaiacol,   etc   ; biogasification; catalysts; methane; methane production; methanol; steam; streams; toluene;     Show all 9 Subjects
Abstract:
... This study assessed performance of a steam methane reforming (SMR) catalyst for reforming tar produced during biomass gasification. Bench–scale reforming tests are presented using methanol/water mixtures with guaiacol or toluene in the range of 0–4 wt%. Long-duration tests indicate that the SMR catalyst could operate for thousands of hours at 0.5 wt% tar loading. Tests at tar loadings up to 4 wt% ...
DOI:
10.1016/j.biteb.2022.100968

16. Enhancement in the metal efficiency of Ru/TiO2 catalyst for guaiacol hydrogenation via hydrogen spillover in the liquid phase

Author:
Hyungjoo Kim; Seungdo Yang; Yong Hyun Lim; Jaeha Lee; Jeong-Myeong Ha; Do Heui Kim
Source:
Journal of catalysis 2022 v.410 pp. 93-102
ISSN:
0021-9517
Subject:
guaiacol,   etc   ; catalysts; catalytic activity; hydrogen; hydrogenation; isotopes; kinetics; liquids; temperature;     Show all 9 Subjects
Abstract:
... Decrease in the metal dispersion of noble-metal-loaded catalysts with high metal loading is a major factor reducing noble-metal efficiency. Herein, we investigated the enhancement in metal efficiency of Ru/TiO₂ catalyst by utilizing hydrogen spillover in the liquid-phase. Ru was highly dispersed at low loadings (0.1 and 0.5 wt%), while larger nanoparticles were formed at higher loadings (1–5 wt%). ...
DOI:
10.1016/j.jcat.2022.04.017

17. Variation of Volatile Compounds and Corresponding Aroma Profiles in Chinese Steamed Bread by Various Yeast Species Fermented at Different Times

Author:
Yaling Huang; Junwen Wan; Zhuolin Wang; Min Sun; Tao Feng; Chi-Tang Ho; Shiqing Song
Source:
Journal of agricultural and food chemistry 2022 v.70 no.12 pp. 3795-3806
ISSN:
1520-5118
Subject:
guaiacol,   etc   ; breads; fermentation; flavor; food chemistry; gas chromatography-mass spectrometry; o-cresol; odor compounds; odors; phenylethyl alcohol; quality control; sensory evaluation; taste sensitivity; yeasts;     Show all 14 Subjects
Abstract:
... To control the fermentation process of yeast-Chinese steamed bread (CSB), the volatile compounds and odor profiles of yeast-CSBs during fermentation were comprehensively investigated by sensory evaluation, gas chromatography–mass spectrometry, gas chromatography–olfactometry (GC–O), and odor activity value (OAV). Eight sensory attributes were established, and quantitative descriptive analysis resu ...
DOI:
10.1021/acs.jafc.2c00550

18. An Oxidative Dearomatization Approach to Tetrodotoxin via a Masked ortho-Benzoquinone

Author:
Jacob G. Robins; Jeffrey S. Johnson
Source:
Organic letters 2021 v.24 no.2 pp. 559-563
ISSN:
1523-7052
Subject:
guaiacol,   etc   ; aromatic hydrocarbons; benzoquinones; diastereoselectivity; dihydroxylation; hydroxylamine; oxidation; stereoselective synthesis; tetrodotoxin;     Show all 9 Subjects
Abstract:
... Progress toward a stereoselective synthesis of tetrodotoxin (TTX) is presented. Oxidative dearomatization of a tetrasubstituted guaiacol arene yielded a masked ortho-benzoquinone that intercepted an acyl nitroso species generated in situ by the copper-catalyzed aerobic oxidation of an acyl hydroxylamine. The subsequent alkene dihydroxylation and reduction of a bis-neopentylic ketone proceeded with ...
DOI:
10.1021/acs.orglett.1c03998

19. Cooperative Effects between Ni-Mo Alloy Sites and Defective Structures over Hierarchical Ni-Mo Bimetallic Catalysts Enable the Enhanced Hydrodeoxygenation Activity

Author:
Yaowen Zhang; Guoli Fan; Lan Yang; Lirong Zheng; Feng Li
Source:
ACS sustainable chemistry & engineering 2021 v.9 no.34 pp. 11604-11615
ISSN:
2168-0485
Subject:
guaiacol,   etc   ; alloys; biofuels; biomass; catalysts; cyclohexanes; density functional theory; green chemistry;     Show all 8 Subjects
Abstract:
... Currently, the rational design of non-noble metal catalysts for highly efficient biomass upgrading into biofuels and chemicals is quite desired. In this regard, tuning the oxophilic property of catalysts can significantly impact their activity and selectivities to target deoxygenated products in the hydrodeoxygenation (HDO) of lignin-derived phenolics. Herein, MoOₓ-decorated bimetallic Ni-Mo catal ...
DOI:
10.1021/acssuschemeng.1c04762

20. Nickel nano-particles confined in ZSM-5 framework as an efficient catalyst for selective hydrodeoxygenation of lignin-derived monomers

Author:
Bhavna Saini; Anup Prakash Tathod; Jitendra Diwakar; Selvamani Arumugam; Nagabhatla Viswanadham
Source:
Biomass and bioenergy 2022 v.157 pp. 106350
ISSN:
0961-9534
Subject:
guaiacol,   etc   ; acidity; bioenergy; biomass; catalysts; catalytic activity; lignin; nickel; synergism; vanillin;     Show all 10 Subjects
Abstract:
... The present study offers an efficient, economical, non-noble metal based catalytic process for the selective HDO of lignin-derived compounds. HDO of major lignin constituting monomers like vanillin, syringaldehyde, guaiacol, and cresol were studied over Ni(2.5)@ZSM-5 catalysts. Complete conversion of vanillin and syringaldehyde was achieved with >99% selectivity towards creosol and 4-methylsyringo ...
DOI:
10.1016/j.biombioe.2022.106350