Article
Biochemistry & Molecular Biology
Kyoung-Hwan Choi, Dong-Jin Seo, Yu-Jin Kim, San-Seong Cho, Yu-Jin Han, Inchan Yang, Chel-Woo Kim, Kyeongseok Oh, Jung-Chul An, Joo-Il Park
Summary: The removal of nitrogen from coal tar pitch (CTP) was evaluated using NiMo/γ-alumina and CoMo/γ-alumina catalysts. Mass spectrometry was used to analyze the chemical species of CTP and the treated products. The results showed that a single-stage hydrodenitrogenation treatment had low nitrogen removal performance, but combining hydrodesulfurization and hydrodenitrogenation resulted in significantly improved nitrogen removal performance.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Biotechnology & Applied Microbiology
Bruno da Costa Magalha, Ruben Checa, Chantal Lorentz, Pavel Afanasiev, Dorothee Laurenti, Christophe Geantet
Summary: In this study, Chlorella sorokiniana microalgae was converted into bio-oil by hydrothermal liquefaction (HTL) at 300°C and 10 MPa. The bio-oil was then upgraded using a sulfided NiW/Al2O3 catalyst at three different temperatures. It was found that the HTL reaction converted the lipids in the biomass into fatty acids, which were further converted into n-alkanes during the upgrading stage. The upgraded bio-oil showed a higher heating value and lower molar mass, with the removal of oxygen, nitrogen, and sulfur compounds.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2023)
Article
Energy & Fuels
Zhichen Zhang, Zenghao Wang, Lanjie Zhang, Junjie Cui, Shuhai Guo, Honghai Ji, Yanjun Liu, Guoli Zhao, Wei Zhu, Chong Jiao, Yonggang Cao, Dong Liu
Summary: In the needle coke industry, the utilization of raffinate oil from raw material refining has been improved through co-carbonization to enhance the structural evolution of aromatic feedstock. By investigating the carbonization behavior and structural evolution of blended materials, this study optimized the industrial structure of needle coke preparation process, resulting in increased yield and quality of derived products.
Article
Chemistry, Physical
Jose Miguel Hidalgo Herrador, Zdenek Tisler, Jaroslav Kocik, Jakub Fratczak, Ivana Hradecka, Romana Velvarska, Hector de Paz Carmona
Summary: The study showed that sulfided metal catalysts exhibited higher activity for the production of methyl isobutyl ketone. Among the non-previously-activated and hydrogen activated catalysts, NiMo/Ph-HCl showed the highest activity for the production of methyl isobutyl ketone. Regarding the production of 2-methyl pentane, the hydrogen-activated CoMo/Ph-HCl catalyst was the most active compared to the other two hydrogen-activated materials.
Article
Energy & Fuels
Wenbin Huang, Yasong Zhou, Qiang Wei, Xiaodong Liu, Pengfei Zhang, Zhusong Xu, Zhiqing Yu, Xiaohan Wang, Haoran Liu, Xiaojun Dai, Han Yang
Summary: In this study, mesoporous TiO2-Al2O3 composites with different Ti/Al molar ratios were successfully synthesized and used as supports for NiW catalysts. The effects of Ti modification on the physicochemical properties of the supports and catalysts were investigated. It was found that Ti modification improved the HDN performance of the catalysts.
Article
Energy & Fuels
Elham Nejadmoghadam, Abdenour Achour, Pouya Sirous-Rezaei, Muhammad Abdus Salam, Prakhar Arora, Olov Ohrman, Derek Creaser, Louise Olsson
Summary: This study investigates the thermal and catalytic hydrotreatment of a simulated pyrolysis oil and compares the effects of reaction conditions and different oxygenated organic compounds on product yields and properties. It finds that the presence of oxygenated furan and sugar compounds significantly affects the yield of liquid product and promotes solid formation. Stabilizing furan, especially with attached carbonyl groups and sugar derivatives, is important for improving upgrading efficiency in pyrolysis oil.
Article
Materials Science, Multidisciplinary
M. Gonzalez-Ildelfonso, J. Escobar, E. Gordillo-Cruz, P. del Angel, V. A. Suarez-Toriello, J. A. De los Reyes
Summary: In this study, researchers successfully achieved deep removal of refractory dibenzothiophene using catalysts supported on Al2O3 with noble metal modification. Calcined catalysts showed better catalytic activity, while Ru-doped catalysts were detrimental to catalytic activity when not calcined before activation.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Applied
Juan Liu, Wen-Ying Li, Jie Feng, Xiang Gao
Summary: Adding Fe to Pt catalyst can significantly improve sulfur tolerance, promote the reduction of Pt oxides, enhance the dispersion of Pt nanoparticles, and increase the affinity to sulfur, making Fe a favorable additive for hydrodesulfurization.
Article
Energy & Fuels
Dmitry A. Sukhorukov, Roman G. Kukushkin, Maria V. Alekseeva (Bykova), Olga A. Bulavchenko, Olesya O. Zaikina, Mikhail E. Revyakin, Maxim O. Kazakov, Vadim A. Yakovlev
Summary: This paper focuses on upgrading sewage sludge-derived pyrolysis oil through hydrotreatment using catalysts. The results show that effective heteroatom removal can be achieved, especially with the NiMoPS/Al2O3 catalyst at 400 degrees C. Additionally, the catalysts used in the process accumulate certain impurities, indicating the importance of selecting appropriate catalysts and construction materials for further study.
Article
Energy & Fuels
Zegang Qiu, Shaobo Ma, Zenghui Zhang, Zhiqin Li, Liang Ding, Liangfu Zhao
Summary: NiW/USY-gamma-Al2O3 catalysts modified with P, Zr, and Mn were prepared. The addition of P and Mn enhanced the hydrocracking activity, while the addition of Zr decreased it.
INTERNATIONAL JOURNAL OF OIL GAS AND COAL TECHNOLOGY
(2022)
Article
Chemistry, Physical
Alexey Y. Kirgizov, Baodong Ding, Artur A. Spiridonov, Lei Liu, Artem Laskin, Chang Cao, Il'dar R. Il'yasov, Ameen A. Al-Muntaser, Xiaodong Zhou, Radik A. Zinnatov, Alexander A. Lamberov, Chengdong Yuan, Mikhail A. Varfolomeev
Summary: Co-Mo/gamma-Al2O3 catalysts with different pore shapes were synthesized for the ex situ upgrading of extra heavy oils. Catalysts synthesized on a carrier with cylindrical pores exhibited higher catalytic activity in sulfur, heavy metals, and asphaltenes removal reactions.
Article
Energy & Fuels
Mengjuan Zhang, Chao Wang, Zhennan Han, Kangjun Wang, Zhanguo Zhang, Guoqing Guan, Abuliti Abudula, Guangwen Xu
Summary: The Ni-Mo/Al2O3 catalyst calcinated using infrared radiation heating showed superior catalytic performance in the HDS of shale oil, resulting in lower sulfur content in the product oil compared to the catalyst calcinated in a conventional electric furnace. Characterization of the catalysts revealed that the infrared-heating catalyst had higher BET surface area, smaller and narrower metal particle size distribution, higher binding energy between Mo and S, and more oxygen-deficient sites than the conventionally heated catalyst.
Article
Chemistry, Physical
Bruno C. Magalhaes, Ruben Checa, Chantal Lorentz, Mathieu Prevot, Pavel Afanasiev, Dorothee Laurenti, Christophe Geantet
Summary: Global energy demand and environmental concerns have led to a growing emphasis on fuel production from renewable resources. Microalgae offer an attractive alternative carbon source. This study investigated the hydroconversion of bio-oil derived from hydrothermal liquefaction of microalgae using supported catalysts. NiW sulfide catalysts proved to be the most efficient, producing a hydrotreated oil with superior properties. The results suggest that different catalysts promote different reaction pathways, contributing to the conversion of refractory compounds.
Article
Chemistry, Multidisciplinary
Yi Wang, Feng Tian, Yonghong Zhu, Louwei Cui, Xiaoyong Fan, Chongpeng Du, Feili Wang, Huaan Zheng, Yang Yang, Dong Li
Summary: During the lightweight processing and use of coal tar (CT), heavy fractions such as asphaltene and resin can easily undergo physical aggregation and chemical coking reaction, leading to disruption of normal processing. This study conducted hydrogenation experiments and used a novel separation method to analyze the composition and structure characteristics of heavy fractions. The results show that the content of saturates increases while the content of other fractions and asphaltene decreases with higher catalyst to oil ratio (COR).
Article
Chemistry, Physical
Magdi El Fergani, Natalia Candu, Iunia Podolean, Bogdan Cojocaru, Adela Nicolaev, Cristian M. Teodorescu, Madalina Tudorache, Vasile Parvulescu, Simona M. Coman
Summary: This study investigated the catalytic hydrotreatment of humins, a solid byproduct from the conversion of C6 sugars to HMF, using different supported Pd@zeolite catalysts. The reaction parameters and product compositions were studied.