Article
Chemistry, Physical
Lin Dong, Jie Xia, Yong Guo, Xiaohui Liu, Haifeng Wang, Yanqin Wang
Summary: Efficient and selective cleavage of C-aromatic-C linkages in lignin to enhance monocyclic aromatic hydrocarbon production is a challenging task. The Ru/Nb2O5 catalyst shows high activity and remarkable selectivity for monocyclic hydrocarbons, with NbOx playing a key role in the C-aromatic-C bond cleavage mechanism. This study provides insights for the design of new, high efficient catalysts.
JOURNAL OF CATALYSIS
(2021)
Article
Chemistry, Physical
Liang Jiang, Guangyue Xu, Yao Fu
Summary: The conversion of lignin into value-added chemicals is an important pathway for sustainable development. In this study, an AlPyOx support synthesized using phytic acid as the phosphorus source and pore former, along with Ni loading, exhibited high catalytic activity for the conversion of lignin model compounds to high-value-added chemicals under mild conditions. The unique activity of Ni/AlP0.5Ox can be attributed to the interaction between metallic Ni and AlP0.5Ox, as well as the unique adsorption of substrates on the carrier. Lignin can also be degraded over Ni/AlP0.5Ox, yielding identified monomers.
Article
Energy & Fuels
Han-Bing Gao, Le-Le Qiu, Fa-Peng Wu, Jian Xiao, Yun-Peng Zhao, Jing Liang, Yong-Hui Bai, Fang-Jing Liu, Jing-Pei Cao
Summary: C-O bonds in lignin can be efficiently cleaved by a hydrotalcite-derived Ni-based catalyst, leading to the production of high value-added bio-fuels and chemicals. The optimized Ni/Al2O3-500 catalyst exhibits excellent catalytic activity and stability, with complete conversion of diphenyl ether to monomeric products under optimized conditions. This catalyst shows promising potential in the hydrogenolysis of lignin derivatives.
Article
Energy & Fuels
Hai-Tao Wang, Zhan-Ku Li, Hong-Lei Yan, Zhi-Ping Lei, Jing-Chong Yan, Shi-Biao Ren, Zhi-Cai Wang, Shi-Gang Kang, Heng-Fu Shui
Summary: Selective hydrogenolysis of lignin can be achieved using a highly dispersed Ni-Ru/Al2O3 catalyst. The catalyst exhibits high activity for the hydrogenolysis of lignin and model compounds, with the apparent activation energy depending on the structure of the substrates.
Article
Chemistry, Applied
Zhenglong Xue, Qimeng Liu, Guanhua Wang, Wenjie Sui, Ashak Mahmud Parvez, Chuanling Si
Summary: This study presents a novel nano-catalyst, ultrafine Ni nanocluster anchored on N-doped carbon nanosheets (Ni/LNC), for efficient catalytic transfer hydrogenolysis of poplar organosolv lignin. The catalyst shows excellent catalytic activity under mild conditions and exhibits good recycling stability, providing a simple and low-cost approach for lignin hydrogenolysis synthesis.
FUEL PROCESSING TECHNOLOGY
(2023)
Article
Energy & Fuels
Chengzhi Zhang, Xing Zhang, Jingfeng Wu, Lingjun Zhu, Shurong Wang
Summary: In this study, bifunctional catalysts composed of Ni-Co alloy and NbOx support were synthesized for the hydrodeoxygenation (HDO) reaction of lignin-derived phenolics. The catalysts exhibited excellent catalytic activity and selectivity, thanks to the uniform composition of the Ni-Co alloy, oxygen vacancies provided by the NbOx support, and the synergistic catalysis between them.
Article
Energy & Fuels
Meiyan Hou, Hui Chen, Yanjing Li, Haijun Wang, Lu Zhang, Yadong Bi
Summary: A new type of Ni-EDTA/Al2O3 catalyst was prepared, which showed a higher total monomer yield in lignocellulose reductive catalytic fractionation process due to the high dispersion of nickel nanoparticles and the protection of a carbon layer.
Article
Energy & Fuels
Xi Li, Yuan Liu, Wenjin Wang, Jin Wang, Kingdom Alorku, Qiying Liu, Longlong Ma, Ying Xu
Summary: Solvents and catalysts play a crucial role in the depolymerization of lignin. This study investigated the effect of different solvents on the hydrogenolysis of ss-O-4 MC and alkaline lignin. It was found that ethanol and 1,4-dioxane resulted in higher conversion and monophenol yield for MC. The composition, structure, and distribution of lignin degradation products were analyzed, and the results showed that different solvent ratios and reaction conditions influenced the monomer yields. The synergistic effect of Pd/C and NaOH improved monomer yield and inhibited intermediate polymerization.
Article
Agricultural Engineering
Chongbo Cheng, Pengfei Li, Wenbing Yu, Dekui Shen, Sai Gu
Summary: In this study, catalytic hydrogenolysis of organosolv poplar lignin was conducted using NiCu/C catalysts in ethanol/isopropanol solvent, achieving high yields of phenolic monomers. The introduction of Cu in catalysts promoted the hydrogen donor process of the solvent and facilitated the cleavage of lignin linkages, resulting in decreased molecular weight of bio-oil. The possible lignin dimer type structures were proposed and identified by MALDI-TOF MS, providing a better understanding of NiCu/C catalyzed lignin depolymerization.
BIORESOURCE TECHNOLOGY
(2021)
Article
Chemistry, Physical
Antonina A. A. Stepacheva, Oleg V. V. Manaenkov, Mariia E. E. Markova, Alexander I. I. Sidorov, Alexsey V. V. Bykov, Mikhail G. G. Sulman, Lioubov Kiwi-Minsker
Summary: Lignin obtained from lignocellulosic biomass by hydrogenolysis can be a valuable source of green fuels and chemicals. Efficient catalysts are crucial for the conversion of lignin to monophenols. In this study, Ni, Ru, and Ni-Ru nanoparticles were synthesized and supported on SiO2-coated hypercrosslinked polystyrene (SiO2@HPS) as catalytic materials. The Ni-Ru/SiO2@HPS catalyst showed remarkable stability, no loss of metallic phase, and high yield of monophenols (>42 wt.%) with close to full lignin conversion (>95 wt.%), attributed to the synergy between the two metals and the support's surface acidity. Comprehensive physico-chemical characterization was performed for all catalysts.
Review
Chemistry, Multidisciplinary
Haichuan Zhang, Shiyu Fu, Xu Du, Yulin Deng
Summary: This review discusses the latest advances in biomass-derived biofuels and biochemicals as alternatives to petroleum, focusing on the synthesis and fabrication of porous nanocatalysts for hydrogenolysis of lignin. The emphasis is on catalyst design, the effects of different supports, and the challenges and opportunities for lignin hydrogenolysis over nanomaterial-supported catalysts.
Article
Agricultural Engineering
Tang Son Nguyen, Manh Tu Le, Van Hieu Nguyen
Summary: In this work, the hydrogenolysis of benzyl phenyl ether (BPE) and real organosolv lignin feedstock using NixFey/TiN bimetallic catalysts was investigated. The bimetallic catalysts showed higher activity and selectivity compared to single-component materials, with Ni5Fe2/TiN exhibiting the best performance. XANES analysis confirmed electron transfer from Ni to Fe in Ni5Fe2/TiN, explaining its superior activity.
BIOMASS & BIOENERGY
(2023)
Article
Chemistry, Multidisciplinary
Atal Shivhare, Deshetti Jampaiah, Suresh K. Bhargava, Adam F. Lee, Rajendra Srivastava, Karen Wilson
Summary: Global temperature rise has led to adverse climate impacts, mainly due to anthropogenic greenhouse gas emissions; Lignin, a renewable resource, can replace aromatic hydrocarbons from fossil sources; Hydrogenolysis reaction has gained significant attention as an effective way for cleavage of lignin-derived aromatic ethers.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Chemistry, Physical
Md Anwar Hossain, Tinnakorn Saelee, Sarttrawut Tulaphol, Mohammad Shahinur Rahaman, Thanh Khoa Phung, Thana Maihom, Piyasan Praserthdam, Supareak Praserthdam, Daniel J. Yelle, Noppadon Sathitsuksanoh
Summary: In this study, efficient hydrogenolysis of lignin was achieved using Ru/C catalyst and internal hydrogen. The aliphatic hydroxyl groups in lignin facilitated the cleavage of beta-O-4 bonds and the formation of phenolic monomers. Solvents with high donor numbers enhanced the yield of phenolic monomers. These findings offer a novel approach for the design of lignin isolation processes and solvent systems in biorefineries.
Review
Agricultural Engineering
Ke Ye, Ying Liu, Shubin Wu, Junping Zhuang
Summary: This paper reviews the present status, advantages and disadvantages of catalytic hydrogenolysis of lignin from two aspects of the solvent system and catalyst system. Solvents have been found to have a huge impact on the hydrogenolysis process and product distribution of lignin, the repolymerization of active intermediates is the main reason for char formation. It is proposed that the influence of different lignin structures should be fully considered in the catalyst design process, and the mechanism study of the hydrogenolysis process should focus on real lignin rather than model compounds.
INDUSTRIAL CROPS AND PRODUCTS
(2021)
