Article
Energy & Fuels
Sepideh Izaddoust, Idoia Hita, Naydu Zambrano, David Trueba, Roberto Palos, Wen Zhang, Eva Epelde, Jose M. Arandes, Pedro Castano
Summary: In this study, we investigate the conversion of heavy-fuel oil waste from marine-transport operations into transportation fuels. The process involves hydrotreatment and fluid catalytic cracking, which can reduce sulfur content and yield high-quality gasoline.
Review
Energy & Fuels
Dduha Chehadeh, Xiaoliang Ma, Hamza Al Bazzaz
Summary: The need to upgrade heavy oil and residue into cleaner fuel and more valuable products is continuously increasing in refineries. Hydrotreating is the most common and essential process for this purpose. Understanding the kinetics of hydrotreating is important for improving the upgrading chemistry and petroleum refining process.
Article
Energy & Fuels
Tiebin Liu, Peiliang Sun, Huihong Zhu, Tao Yang, Bingtao Tang, Chong Peng
Summary: Two NiMo/Al2O3 catalysts with different acid-base properties were prepared and their effects on FCC diesel hydrotreating and desulfurization performance were investigated. The results showed that the surface structural differences affected the interaction between metals and oxygen atoms, leading to differences in catalytic activity. The catalyst with more active phases exhibited better desulfurization and denitrification performance, while the catalyst with higher sulfidation degree showed better hydrotreating performance. The findings provide insights for improving the performance of catalysts used in refinery processes.
Article
Energy & Fuels
July C. Vivas-Baez, Gerhard D. Pirngruber, Alberto Servia, Anne-Claire Dubreuil, David J. Perez-Martinez
Summary: This study investigates the impact of vacuum gas oil properties on the deactivation rate of a hydrocracking catalyst, showing that the nature and content of organic nitrogen and aromatics compounds in the feedstock play a determinant role in the deactivation rate. The experiments were carried out under high temperature and high space velocity conditions, and the results suggest a coupled role of organic nitrogen and aromatics in promoting coke deposition on the catalyst surface, leading to an increase in deactivation rate beyond the end boiling point of the feed.
Article
Energy & Fuels
Neeraj Pal, Vikas Verma, Azeem Khan, Ankit Mishra, Mohit Anand, Chodimella Venkata Pramod, Saleem Akhtar Farooqui, Anil Kumar Sinha
Summary: The study demonstrates the effectiveness of a heterogeneous mesoporous Ni-Mo/gamma-Al2O3 catalyst in removing metals from non-edible raw jatropha oil (RJO) during hydrodemetalation (HDM). Lower temperatures favor HDM, while higher temperatures promote RJO conversion. The catalyst shows promising potential for improving catalyst aging and green diesel production.
Article
Energy & Fuels
Yanzi Jia, Anpeng Hu, Dawei Hu, Mingfeng Li, Huifeng Li, Qinghe Yang, Zhiwei Liu, Zhicai Shao, Shuangqin Zeng, Xinqiang Zhao, Yifan Wang
Summary: By strengthening metal-support interaction (MSI) and metal dispersion, a catalyst with high activity and long-term stability was designed. The impacts of pseudo-boehmite and catalyst calcination temperature on surface properties were thoroughly investigated.
Article
Energy & Fuels
Juan J. Rios, Emilio Leal, Fernando Trejo, Jorge Ancheyta
Summary: Due to high emissions of polluting gases from fossil fuel combustion, organizations and governments have established standards for cleaner fuels. This study examines the kinetic models of hydrotreating reactions for producing ultralow sulfur diesel. It includes discussions on reaction systems, catalysts, operating conditions, and proposes a set of kinetic models for simulation.
Article
Engineering, Environmental
Diogo Pimentel de Sa da Silva, David Clebson de Melo Silva, Thais Regina Silva Ribeiro, Julyane Rocha Santos Solano, Bruno Jose Barros da Silva, Sarah Arvelos Altino, Antonio Osimar Sousa da Silva
Summary: This study evaluated the effects of carbon chain size and crystallization temperature on the properties of mesoporous alumina synthesis. The results showed that mesoporous alumina synthesized using caprylic acid as the structure-directing agent at 180 degrees C exhibited improved structural, textural, and basic properties, as well as high CO2 adsorption capacity and stability.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Energy & Fuels
Emilio Leal, Pablo Torres-Mancera, Jorge Ancheyta
Summary: This article discusses a technology of placing different catalysts in multibed configurations to produce a synergistic effect and proposes it as a viable low-investment solution for ultralow sulfur diesel (ULSD) production. However, the synergistic effect between the catalysts is not fully understood yet, and designing the best stacking system is challenging. Therefore, further research on the influences of variables and the development of new mathematical models are necessary.
Article
Engineering, Chemical
Yachen Yin, Wenbin Chen, Guilian Wu, Feng Xin, Kang Qin, Yutao Lu, Le Zhang, Mingfeng Li
Summary: In the process of ultra-deep hydrodesulfurization of diesel, two lumped kinetic models and a four-lump kinetic model of aromatic hydrosaturation are proposed. The study found that thermodynamics play a crucial role in UHDS, and also revealed the temperature dependence of organonitrogen inhibition on HDS.
Article
Chemistry, Physical
Ricardo Garcia de Castro, Elodie Devers, Mathieu Digne, Anne-Felicie Lamic-Humblot, Gerhard D. Pirngruber, Xavier Carrier
Summary: The study investigates the surface-dependent genesis of supported transition metal sulfide catalysts on single crystals, revealing the impact of metal-support interactions and providing theoretical support for the improvement of hydrotreating catalysts.
JOURNAL OF CATALYSIS
(2021)
Article
Energy & Fuels
Hung Hai Pham, Kwang Ho Kim, Kang Seok Go, Nam Sun Nho, Woohyun Kim, Eun Hee Kwon, Ryu Ho Jung, Young-il Lim, Suk Hyun Lim, Dung Anh Pham
Summary: A kinetic model for the slurry phase hydrocracking of vacuum residue was proposed, with a five-lump model and ten reaction pathways adopted to describe the hydrocracking kinetics. The kinetic parameters were estimated considering the change in liquid density with reaction time, and the model predicted product yields and concentrations with an average error of less than 10%.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Chemistry, Physical
Zohal Safaei Mahmoudabadi, Alimorad Rashidi, Mohammad Panahi
Summary: Highly active ReS2 nanocatalysts were prepared and applied in upgrading heavy crude oil, showing significant catalytic activities. RSM technique was used to investigate the effects of temperature, pressure, and dosage of catalyst on reaction performance, with optimal conditions yielding highest HDS activity. Additionally, the influence of ReS2 nanorods catalyst on HDN of heavy crude oil was studied, revealing highest efficiency under specific conditions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Environmental Sciences
Fang Yin, Zhiwei He, Zhibo Song, Weiwei Zhang, Xianbin Li, Boyu Qin, Li Zhang, Penghao Su, Junbo Zhang, Daisuke Kitazawa
Summary: This study focuses on the gas-particle partitioning of PAHs from oil combustion. The findings reveal that PAHs are derived from mixed sources including unburned oil and combustion products. This research contributes to the understanding of the fate and transport of PAH emissions and can potentially improve emergency responses to accidents such as marine oil spills.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2022)
Article
Energy & Fuels
Pojawan Aiamsiri, Dusadee Tumnantong, Boonyawan Yoosuk, Chawalit Ngamcharussrivichai, Pattarapan Prasassarakich
Summary: This research investigated the performance of unsupported and γ-Al2O3 supported Ni-Mo catalysts for palm oil deoxygenation to biohydrogenated diesel. It was found that the hydrothermal method for preparing 0.2-NiMoS2 catalyst was efficient, while the H-NiMoS2/γ-Al2O3-0.2 catalyst prepared using a one-step hydrothermal method showed good HDO activity. Both catalysts could be reused for at least three cycles while maintaining good performance.
Article
Chemistry, Physical
Ming-Yi Chen, Ngoc Thanh Thuy Tran, Ahmed Abubakar Alao, Wen-Dung Hsu
Summary: This study demonstrates the significance of surface Pt atom arrangement for the efficiency of ORR in PEMFCs and reveals the correlation between Pt-Pt average distance and O2 dissociation barrier. Furthermore, the study discovers a robust correlation between the level of the catalyst's d-band center and O2 adsorption energy. High-entropy alloy substrates provide potential for controlling Pt arrangement and O2 dissociation barrier.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Eduardo C. Atayde Jr, Babasaheb M. Matsagar, Yu-Cheng Wang, Kevin C. -W. Wu
Summary: This study presents the first application of an acidic MOF, Sulfated MOF-808, in catalyzing the HAA reactions of furan oligomers for the production of biofuel precursors. The catalyst showed high yield, selectivity, and recyclability, making it versatile for different starting materials.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Maria do Carmo Rangel, Francieli Martins Mayer, Soraia Jesus de Oliveira, Sergio Gustavo Marchetti, Fabricio Luiz Faita, Doris Ruiz, Giovanni Saboia, Mariana Kieling Dagostini, Jonder Morais, Maria do Carmo Martins Alves
Summary: This study developed a new catalyst by investigating the effect of magnesium on the catalytic properties of hematite in ethylbenzene dehydrogenation. The catalyst showed important differences in activity, selectivity, and stability, making it a promising candidate for commercial applications.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Yanjun Li, Qian Wang, Hui Tian, Mingyuan Zhu, Yuanyuan Liu
Summary: A novel strategy using microwave-assisted precipitation was proposed to prepare defective CsH3PMo11VO40 catalyst for the oxidation of methacrolein to methacrylic acid. Microwave treatment accelerates crystallization, increases vanadyl species content, and forms defective Keggin structures, thereby enhancing the oxidation capacity of the catalyst.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Rajeshwari Athavale, Sailee Gardi, Fatima Choudhary, Dayanand Patil, Nandkishor Chandan, Paresh More
Summary: In this study, a novel acidic ionic liquid catalyst was prepared and used for the synthesis of bis-indolyl methane derivatives. The catalyst exhibited short reaction times, easy purification, and reusability.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Masatomo Hattori, Takato Hattori, Masakuni Ozawa
Summary: Cu-added gamma-Al2O3 catalysts were prepared with varying Cu loadings and the effects of copper oxidation states on catalytic activity were investigated. The results showed that the addition of copper increased the catalyst activity, but excessive copper loading decreased catalytic activity. XRD and TEM analysis indicated the formation of a solid solution of copper oxide species on the surface of gamma-Al2O3. XAS and TPR data demonstrated variations in copper oxidation states among the catalysts.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Liwei Fang, Shiyang Niu, Shengsen Wang, Yiqing Lu, Yuanhui Cheng
Summary: In this study, PtNi alloy on nitrogen-doped carbon and SnO2 dual-support was designed to modulate the metal-support interaction, resulting in improved catalytic activity and stability for oxygen reduction reaction. The SnO2/PtNi/NC catalyst exhibited a strongly coupled interface, enhanced electron transfer, and higher half-wave potential compared to PtNi/NC and commercial Pt/C.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Shohei Harada, Duanxing Li, Kenta Iyoki, Masaru Ogura
Summary: This study investigates the catalytic performance of a composite catalyst composed of ZnZrOX and H-zeolite for the hydrogenation of CO2. The deactivation of the composite catalyst is influenced by ion exchange of Zn2+ and/or coke, with their effects differing based on the zeolite structure. Separating the grains of the composite catalyst can prevent deactivation.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Laura Proano, Christopher W. Jones
Summary: In this study, NiGa alloy particles supported on CeO2, ZrO2, and ZrO2-CeO2 solid solutions were prepared and characterized. The nature of the support was found to have a significant influence on the catalyst's activity and selectivity, with the crystalline structure of ZrO2 having the greatest impact. Pure ZrO2 showed the highest methanol selectivity and CO2 conversion at high Zr:Ce ratios. In equimolar and Ce-rich conditions, basic sites and oxygen vacancies were found to be the key parameters affecting methanol production.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Liyan Zhang, Yinze Yang, Leilei Zhou, Fengyu Zhao, Haiyang Cheng
Summary: 1,6-Hexamethylenediamine was successfully synthesized via the reductive amination of 1,6-hexanediol using a Ru/PRL(x)-Al2O3 catalyst. The highly dispersed and anchored Ru species, formed by 1,10-phenanthroline (PRL), played a crucial role in the catalytic reaction. The formation of new acid-base pairs, electron deficient Ru species, and smaller nanoparticles contributed to the improved catalytic performances of the Ru/PRL-Al2O3 catalyst.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Anita Horvath, Miklos Nemeth, Andrea Beck, Gyorgy Safran, Valeria La Parola, Leonarda Francesca Liotta, Gregor Zerjav, Matevz Roskaric, Albin Pintar
Summary: This study investigates the catalytic and structural changes caused by the addition of 0.25 wt% indium in a 3% Ni/CeO2-Al2O3 catalyst prepared by impregnation method. The results show that the addition of indium can decrease the activity of the catalyst, but it improves its stability and reduces coking.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Ankush Kularkar, Vaibhav Vilas Khedekar, Sachin D. Chaudhari, Mudavath Ravi, Sadhana S. Rayalu, Penumaka Nagababu
Summary: Efficiently addressing the challenges of photocatalytic CO2 reduction to CH3OH is crucial. This study developed Zn-BTC MOF and its composites with CaIn2S4, achieving highly efficient and robust photocatalytic CO2 reduction to CH3OH under ambient conditions, using H2O2 as the hydrogen source. Among the composites, ZMCIS4 demonstrated excellent performance with a CH3OH evolution of 49100 μmol/g.cat and a quantum efficiency of approximately 78.41%. The enhanced performance was attributed to the production of nascent hydrogen atoms (H center dot) through the photo-splitting of H2O2 on the ZMCIS surface.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Dan Liu, Yudong Li, Chengyu Wang, Haiyue Yang, Rong Wang, Shujun Li, Xiaohui Yang
Summary: In this study, a self-supporting three-dimensional porous Co3O4 nanobelt array decorated on nickel foam (P-Co3O4 -NBA@NF) electrode with numerous active sites was successfully constructed for the oxidation of 5-Hydroxymethylfurfural (HMF) to 2,5-furan dicarboxylic acid (FDCA). The P-Co3O4 -NBA@NF electrode demonstrated high conversion efficiency, selectivity, and Faraday efficiency, as well as remarkable long-term stability. This research provides a promising electrocatalyst for biomass conversion.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Yimin Li, Enggah Kurniawan, Fumiya Sato, Takayoshi Hara, Yasuhiro Yamada, Satoshi Sato
Summary: In this study, several silica-alumina catalysts modified with Ag were examined for the dehydration of 1,3-butanediol to 1,3-butadiene. Among them, an amorphous silica-alumina catalyst (SAL-3) modified with Ag showed the highest improvement in catalytic activity and stability when operated in H2 flow. The generation of reversible acid sites was found to be the reason behind the enhanced activity and stability of this Ag/SAL-3 catalyst. The effects of various parameters on the catalytic activity of Ag/SAL-3, such as reaction temperature, contact time, Ag content, and carrier gas, were investigated.
APPLIED CATALYSIS A-GENERAL
(2024)