Article
Green & Sustainable Science & Technology
Alessio Zuliani, Oleg Kikhtyanin, Camilla Maria Cova, Daily Rodriguez-Padron, David Kubicka, Rafael Luque
Summary: Lignin can be upgraded to bioproducts, contributing to sustainable development. Ni-based SiO2 catalysts and scrap catalytic converters (SCATs) can boost the conversion of anisole, a model compound of lignin, under lower reaction conditions.
ADVANCED SUSTAINABLE SYSTEMS
(2022)
Article
Energy & Fuels
Majid Saidi, Pantea Moradi
Summary: The kinetic study of upgrading anisole to jet-grade fuels via catalytic hydrotreatment process reveals that benzene is formed as the primary product through demethoxylation of anisole, with phenol showing the highest selectivity and activation energy in the hydrogenolysis reaction. The comprehensive quantitative reaction network for anisole catalytic hydrotreatment over Cu/gamma-Al2O3 catalyst is consistent with previous studies.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Review
Chemistry, Multidisciplinary
Xi Cheng, Bruna Palma, Heng Zhao, Hongguang Zhang, Jiu Wang, Zhangxin Chen, Jinguang Hu
Summary: Photoreforming of lignocellulosic biomass to produce gas fuels and value-added chemicals is a promising strategy to address the fossil fuels crisis. Although the utilization of lignin via photoreforming is still in the early stages, it has exciting potential. This review summarizes the latest progress in the photoreforming of lignin-derived components and real lignin, providing insights for lignin photocatalytic valorization and introducing analytic methods for characterizing the conversion and distribution of lignin products. The challenges and perspectives of lignin photoreforming are also discussed, aiming to guide the future valorization of biomass into valuable chemicals and fuels through mild photoreforming processes.
Article
Chemistry, Multidisciplinary
Adarsh Kumar, Meenu Jindal, Shivam Rawat, Abhisek Sahoo, Rahul Verma, Devesh Chandra, Sagar Kumar, Bhaskar Thallada, Bin Yang
Summary: Research found that Ni5Co5-AC catalyst on activated carbon showed the best catalytic performance due to its distorted metal alloy spinel structure and optimum particle size, enhancing its catalytic efficiency.
Article
Energy & Fuels
Ahmed M. I. Elkhaiary, Bartosz Rozmyslowicz, Jher Hau Yeap, Michael H. Studer, Jeremy S. Luterbacher
Summary: The acetate fraction, a compound found in many plant species, can be easily extracted as acetic acid. This study developed a reaction network for the conversion of acetic acid into cycloalkenes and aromatics suitable for use as an aviation fuel additive. The proposed model and parameters provide insights into the reaction network and optimal operation conditions.
Article
Engineering, Chemical
Mahdi Abdi Khanghah, Arezou Jafari
Summary: This study modeled catalytic upgrading reactions in porous media using CFD technique coupled with reaction kinetics. The hydrodynamic characteristics of reactive flow in porous media were investigated, and it was found that they have a significant influence on the conversion of upgrading reactions. Additionally, the study revealed the effects of temperature and residence time on the product distribution of upgrading products.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2022)
Article
Chemistry, Applied
M. I. Avila, M. M. Alonso-Doncel, L. Briones, G. Gomez-Pozuelo, J. M. Escola, D. P. Serrano, A. Peral, J. A. Botas
Summary: The catalytic fast pyrolysis of lignin using ion-exchanged zeolite catalysts showed significant improvements in bio-oil quality and the production of aromatic hydrocarbons and oxygenated compounds.
Article
Engineering, Environmental
Wen-Hui Hu, Meng-Nan Liu, Qun-Xing Luo, Jianbo Zhang, Huiyong Chen, Long Xu, Ming Sun, Xiaoxun Ma, Qing-Qing Hao
Summary: This study investigates the influence of microscale structure of MWW zeolites on the kinetics for acylation of anisole with acetic anhydride. It is found that the acylation reaction occurs solely on the external acid sites of MWW zeolites, and the single-layer MWW (SL-MWW) exhibits higher recycle stability compared to the multiple-layer MWW (ML-MWW). The confinement effect within 12MR pockets on the surface of SL-MWW results in difficult desorption of product and small rate constant.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Agricultural Engineering
Avnish Kumar, Bijoy Biswas, Ramandeep Kaur, Shivam Rawat, Bhavya B. Krishna, Pramod Kumbhar, Siddhartha Pal, Sasisankar Padmanabhan, Thallada Bhaskar
Summary: The effect of various metal oxides on the oxidative depolymerization of industrial lignin in oxygen and air atmosphere was studied. CeO2 showed excellent catalytic activity, promoting the production of bio-oil yield in both oxygen and air, and high selectivity towards acetosyringone was observed. Transitional metals doped CeO2 catalysts were also applied, with Co metal showing the most efficient activity in atmospheric air resulting in the formation of acetosyringone.
BIORESOURCE TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Penghui Yan, Eric Kennedy, Michael Stockenhuber
Summary: The study demonstrates that Ni/BEA and Ni/MOR catalysts show better performance in the hydrogenation of toluene, while Ni/BEA is more effective in the hydrodeoxygenation of anisole.
Article
Chemistry, Multidisciplinary
Ming Hu, Shanhui Zhao, Yonghao Luo
Summary: This study investigates the methods of partial oxidation for biomass tar conversion and their detailed reaction mechanism. The results show that oxygen can promote tar pyrolysis and improve the tar conversion rate. An appropriate amount of oxygen can crack tar into flammable small-molecule gases and inhibit the generation of polycyclic aromatic hydrocarbons. In addition, partial oxidation can improve tar cracking by exothermic oxidation to produce heat. The study also explores the production of typical PAHs based on the rate of product formation, and finds that active radicals like H and OH promote tar cracking.
Article
Agricultural Engineering
Fang Deng, Ananda S. Amarasekara
Summary: This article covers the catalytic upgrading reactions of biomass-derived renewable furan derivatives furfural and 5-hydroxymethylfurfural, with a focus on developments in the last five years. It also discusses the importance of this renewable feedstock class, preparation methods from monosaccharides, and the diversity of possible transformations. Recent advances in catalytic reductions, oxidations, and carbon number upgrading of biofurans are reviewed, highlighting the progress in developing more stable value-added derivatives.
INDUSTRIAL CROPS AND PRODUCTS
(2021)
Article
Energy & Fuels
Ali Abdulkhani, Zahra Echresh Zadeh, Solomon Gajere Bawa, Fubao Sun, Meysam Madadi, Xueming Zhang, Basudeb Saha
Summary: Catalytic upgrading of bio-oil from different types of lignocellulosic biomass using H-ZSM-5 catalyst showed significant reduction in water and oxygen content, viscosity reduction, and increased heating values.
Article
Chemistry, Physical
Cedric Cabral Almada, Aleksandr Kazachenko, Pascal Fongarland, Denilson Da Silva Perez, Boris N. Kuznetsov, Laurent Djakovitch
Summary: The study found that the gold catalyst tended to further oxidize the aromatics produced from lignin depolymerization, resulting in low yields of target molecules, while platinum-based catalysts enhanced yields by preserving the substructure of lignin. A kinetic model revealed that condensation reactions during lignin oxidation and degradation of aromatic compounds were the main limitations to achieving high product yields. Insights on lignin oxidation and the catalyst's role from this study would provide higher control over lignin valorization.
Article
Chemistry, Multidisciplinary
Zhaolin Dou, Zhe Zhang, Hongru Zhou, Min Wang
Summary: The study demonstrated a new method for producing diesel from lignin, utilizing photocatalysis and hydrodeoxygenation to convert biomass into renewable fuel.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
