Article
Chemistry, Physical
Angeles Lopez-Martin, Alfonso Caballero, Gerardo Colon
Summary: The reduction temperature has a crucial effect on the catalytic performance of Mo/HZSM-5 catalyst for methane dehydroaromatiztion reaction. The optimum performance is achieved at 550 degrees C, which may be attributed to the higher fraction of reduced Mo species.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Energy & Fuels
Mengmeng Huang, Jianpeng Li, Qiang Liu, Meng Zhang, Zhongyi Liu, Beibei Gao
Summary: Hollow HZSM-5 zeolite catalysts with different cavity sizes and tunable shell thickness were prepared and exhibited higher conversion and selectivity in methane dehydroaromatization reaction compared to conventional solid catalyst.
Article
Chemistry, Physical
Ruiyao Gao, Xin Li, Zhiheng Wang, Yanyan Liu, Jiong Sun, Yanmei Zhu, Songdong Yao
Summary: The study investigated the impact of oxygen-containing gas components on the reaction regeneration cycle of methane dehydroaromatization (MDA). The results indicated that the addition of oxygen components can prolong the reaction time but cannot prevent the deactivation of the regenerated catalyst. After regeneration, the species and texture properties of the catalyst were restored, leading to complete recovery of methane conversion and aromatic formation. However, the increase in the size of Mo species during regeneration disrupted carbon deposition and significantly reduced methane dissociation. The crystallinity and number of strong acid sites of the catalyst decreased to a stable level before the collapse of the zeolite framework, without hindering aromatic formation. The recovered large-sized Mo species may accelerate the irreversible collapse of the zeolite framework, thereby destroying the Mo/HZSM-5 catalyst.
APPLIED CATALYSIS A-GENERAL
(2022)
Article
Engineering, Chemical
Yuyan Gan, Qian Lv, Yanru Li, Hua Yang, Kaiyang Xu, Lizhi Wu, Yu Tang, Li Tan
Summary: This study investigates the relationship between acid site control and the methane dehydroaromatization (MDA) reaction performance, and tunes the acid sites of the ZSM-5 zeolite by introducing promoters. The results show that appropriate strong Brønsted acid sites are favorable for aromatic formation, while excessive acid sites lead to coke deposition. The stability and aromatic selectivity of the MDA catalyst are further improved by passivating partial Brønsted acid sites using a Silicalite-1 coating.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Engineering, Chemical
Junjun Cheng, Yitao Zhao, Guohao Xu, Peng Zhang, Xuedong Zhu, Fan Yang
Summary: In this work, the alkylation of benzene with carbon dioxide and hydrogen was successfully performed using a mixture of zinc-zirconium oxide and HZSM-5 as a bifunctional catalyst. The best catalytic performance was achieved with an equivalent of Zn/Zr = 1 at 425 degrees C and 3.0 MPa, resulting in a benzene conversion of 42.9% and a selectivity of 90% towards toluene and xylene. Furthermore, more than 50% of the carbon dioxide was effectively incorporated into the target product, which is the best result reported so far. The bifunctional catalyst exhibited excellent stability, with no deactivation observed for at least 80 hours of continuous operation.
FRONTIERS OF CHEMICAL SCIENCE AND ENGINEERING
(2023)
Article
Engineering, Chemical
Xinzhuang Zhang, Yunda Han, Dapeng Li, Zhanguo Zhang, Xiaoxun Ma
Summary: This study investigated the attrition behavior of a Mo/HZSM-5 catalyst in non-oxidative aromatization of methane under different temperatures, running times, and process conditions. Carbon deposition on the catalyst was found to enhance its attrition resistance at high temperatures. The attrition of catalyst particles and carbon deposits were found to have an impact on catalytic performance.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Applied
Deepti Mishra, Sourabh Mishra, Arindam Modak, K. K. Pant, Xiu Song Zhao
Summary: This study modifies the HZSM-5 support to improve the catalytic activity and coke tolerance in methane dehydroaromatization reaction.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Chemistry, Physical
Kihun Nam, Hae Won Ryu, Min Yeong Gim, Do Heui Kim
Summary: This study demonstrates that physically mixed NiO can act as an excellent catalyst promotor for MDA, significantly enhancing the yield and stability by promoting the dispersion of MoCx active sites and suppressing coke formation.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Multidisciplinary
Maria Teresa Portilla, Francisco J. Llopis, Manuel Moliner, Cristina Martinez
Summary: Methane aromatization is an interesting technology with potential, but faces limitations due to thermodynamics and catalyst properties. Mo/H-ZSM-5 is a widely studied catalyst for this process.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Environmental
Md Sifat Hossain, Gagandeep Singh Dhillon, Liping Liu, Apoorva Sridhar, Emanuele J. Hiennadi, Jiyun Hong, Simon R. Bare, Hongliang Xin, Thomas Ericson, Anthony Cozzolino, Sheima J. Khatib
Summary: Literature suggests that the addition of Fe as a separate phase in MoO3/ZSM-5 catalysts improves benzene selectivity in methane dehydroaromatization (MDA), but the characterization of Fe in the catalyst and its interactions with Mo is challenging. In this study, Fe2(MoO4)3/ZSM-5 was used as a catalyst precursor in MDA to explore the influence of Mo-Fe interactions on the stability and selectivity of the catalyst. Fe2(MoO4)3/ZSM-5 showed higher benzene selectivity and stability compared to mixed MoO3 + Fe2O3/ZSM-5 and monometallic MoO3/ZSM-5 catalysts. Structural characterization suggested that Fe2(MoO4)3 partially segregates to Fe2O3 and amorphous MoOx, and the preexisting Fe2O3 on the external surface of the zeolite in the mixed MoO3 + Fe2O3/ZSM-5 precursor prevents migration of (MoO3)3 clusters into the zeolite channels during pretreatment, while Fe2(MoO4)3 enhances migration and anchoring of MoOx species, boosting selectivity to benzene. The presence of Fe also promotes the formation of structured carbon nanofibers, reducing catalyst deactivation rate.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Organic
Zh B. Budaev, L. L. Korobitsyna, E. P. Meshcheryakov, I. A. Kurzina, A. V. Vosmerikov
Summary: The paper investigates the effects of adding an additional mesoporous structure to a Mo/HZSM-5 catalyst for methane dehydroaromatization. The study shows that the addition of carbon black during zeolite synthesis can improve catalytic activity and stability in aromatic production and non-oxidative methane conversion.
PETROLEUM CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Deepti Mishra, Sonit Balyan, Xiu Song Zhao, Muxina Konarova, K. K. Pant
Summary: The catalytic activity of Mo-doped HZSM-5 in methane dehydroaromatization (MDA) is influenced by the state/distribution of initially dispersed Mo-oxide on the zeolite surface. Two different forms of Mo oxide precursors were synthesized to study their effect on catalytic activity. Microwave-assisted impregnation method was used to improve dispersibility, and the features of resulting Mo-containing HZSM-5 catalysts were explored. The MoH2-4M catalyst prepared by MW-impregnated h-MoO3 showed higher benzene formation rate and enhanced resistance to the formation of polyaromatics/hard coke.
REACTION CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Analytical
Huifen Kang, Xintong Guo, Mei An, Qingjie Guo, Guozhang Chang
Summary: A combination of Ca-Fe and HZSM-5 catalysts was proposed to enhance the yields of aromatic hydrocarbons from pinecone pyrolysis. The performance of the catalysts and the mechanism of enhanced aromatic hydrocarbon generation were investigated. The results showed that the combination of Ca-Fe and HZSM-5 catalysts produced the largest peak area and highest relative content of aromatic hydrocarbons. The introduction of Ca-Fe components increased the yield of aromatics, especially benzene, toluene, ethylbenzene, and xylene.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2023)
Article
Chemistry, Applied
Hae Won Ryu, Kihun Nam, Yong Hyun Lim, Do Heui Kim
Summary: This study evaluates the efficiency of NiO particles with various sizes (4, 22, 36, 45, and 101 nm) as promoters, and it is found that NiO(36 nm) has the optimum size for enhancing the activity of Mo/HZSM-5. The analysis reveals that NiO(36 nm)-Mo/HZSM-5 has the highest dispersion of MoCx active sites because it has the lowest reduction temperature for NiO and MoOx. When the NiO particle size is smaller than 22 nm, the formation of inactive NiMoO4 is preferred, resulting in severe agglomeration and low dispersion of MoCx.
Article
Chemistry, Multidisciplinary
Yujie Liu, Hao Zhang, Alexandra S. G. Wijpkema, Ferdy J. A. G. Coumans, Lingqian Meng, Evgeny A. Uslamin, Alessandro Longo, Emiel J. M. Hensen, Nikolay Kosinov
Summary: This study focused on the mechanism and structural changes of Mo/ZSM-5 catalysts during methane dehydroaromatization reaction using operando X-ray absorption near edge structure spectroscopy. The results showed that the nature of active sites is similar and the ZSM-5 unit cell contracts at the beginning of the reaction, coinciding with benzene formation.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Chemistry, Physical
Yang Song, Yuebing Xu, Yoshizo Suzuki, Hideki Nakagome, Xiaoxun Ma, Zhan-Guo Zhang
JOURNAL OF CATALYSIS
(2015)
Article
Engineering, Environmental
Lina Gan, Shan Lei, Jian Yu, Hongtao Ma, Yo Yamamoto, Yoshizo Suzuki, Guangwen Xu, Zhanguo Zhang
FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING
(2015)
Article
Engineering, Chemical
Yuebing Xu, Yang Song, Xiaohao Liu, Zhan-Guo Zhang
CHEMICAL ENGINEERING & TECHNOLOGY
(2016)
Article
Green & Sustainable Science & Technology
Zhanguo Zhang, Yuebing Xu, Yang Song, Hongtao Ma, Yo Yamamoto
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
(2016)
Article
Chemistry, Multidisciplinary
Changming Li, Hong Zeng, Pingle Liu, Jian Yu, Feng Guo, Guangwen Xu, Zhan-guo Zhang
Article
Energy & Fuels
Jian Yu, Changming Li, Feng Guo, Shiqiu Gao, Zhan-guo Zhang, Koichi Matsuoka, Guangwen Xu
Article
Chemistry, Physical
Yuebing Xu, Yoshizo Suzuki, Zhan-Guo Zhang
APPLIED CATALYSIS A-GENERAL
(2013)
Article
Chemistry, Physical
Yang Song, Yuebing Xu, Yoshizo Suzuki, Hideki Nakagome, Zhan-Guo Zhang
APPLIED CATALYSIS A-GENERAL
(2014)
Article
Energy & Fuels
Yuebing Xu, Jiangyin Lu, Yoshizo Suzuki, Zhan-Guo Zhang, Hongtao Ma, Yo Yamamoto
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2013)
Article
Engineering, Environmental
Juan Yang, Hongtao Ma, Yo Yamamoto, Jian Yu, Guangwen Xu, Zhanguo Zhang, Yoshizo Suzuki
CHEMICAL ENGINEERING JOURNAL
(2013)
Article
Metallurgy & Metallurgical Engineering
Renguo Song, Zhanguo Zhang, Chao Wang, Hai Li, Zhixiu Wang
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2013)
Article
Chemistry, Physical
Yuebing Xu, Yang Song, Yoshizo Suzuki, Zhan-Guo Zhang
CATALYSIS SCIENCE & TECHNOLOGY
(2013)
Article
Chemistry, Physical
Yuebing Xu, Yang Song, Yoshizo Suzuki, Zhan-Guo Zhang
CATALYSIS SCIENCE & TECHNOLOGY
(2014)
Article
Chemistry, Applied
Yuebing Xu, Yang Song, Zhan-Guo Zhang
Article
Chemistry, Physical
Yang Song, Qian Zhang, Yuebing Xu, Yi Zhang, Koichi Matsuoka, Zhan-Guo Zhang
APPLIED CATALYSIS A-GENERAL
(2017)
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)