Article
Chemistry, Applied
Henry Steven Fabian Ramos, Joseph P. Mmbaga, Robert E. Hayes
Summary: This paper presents a study on catalyst configuration for lean methane combustion using computational modelling. The use of platinum group metals catalyst in a washcoated monolith is investigated, and the computational model is validated using experimental data from a small-scale pilot plant reactor. The results show that catalyst activity and reactor length are critical for system performance and stability.
Article
Chemistry, Physical
Shunsaku Yasumura, Chong Liu, Takashi Toyao, Zen Maeno, Ken-ichi Shimizu
Summary: The study found that NO' species formed on H-CHA and Cu-CHA are more stable at lower temperatures, with a negative apparent activation energy for the formation of NO+ species on H-CHA. DFT calculations showed that Bronsted acid sites in zeolite pores promote the dissociation of N2O4 intermediates and the reduction of NO+ species by NH3 has a considerably low activation barrier.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Physical
Hiroshi Yoshida, Haruka Oyama, Ryo Shiomori, Taiki Hirakawa, Junya Ohyama, Masato Machida
Summary: The addition of nickel increased the NO reduction activity of Cu/Al2O3 by forming a NiCuAl2O4 solid solution, promoting NO adsorption on Cu+ and accelerating the NO reduction reaction.
Article
Engineering, Environmental
Yun Shi, Jiali Pu, Liwei Gao, Shengdao Shan
Summary: Selective catalytic reduction (SCR) using NH3 and CH4 over InCeOx/HBEA catalysts exhibited high activity and nearly 100% NOx conversion in the temperature range of 250 to 600 degrees Celsius. The catalyst also showed good tolerance to CO2, H2O, and SO2. These findings indicate In8CeOx/HBEA as a promising catalyst for NOx removal from natural gas fueled engines.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Green & Sustainable Science & Technology
Xiangyu Meng, Meichao Qin, Lizi Liu, Zechuan Cui, Jiangping Tian, Wuqiang Long, Mingshu Bi
Summary: This paper investigates the comprehensive impacts of ammonia cracking ratio (CR) and equivalence ratio (ER) on combustion performance and NO/N2O/NO2 behaviors in lean-burn operation mode. The study reveals that blending ammonia with cracked gas enhances combustion rate but increases NOx emissions. Varying CR with decreasing ER can sustain high combustion rate while reducing NOx emissions. Complete cracking or separation of non-cracked ammonia is favorable for NOx elimination.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Environmental Sciences
Abrar Inayat, Lisandra Rocha-Meneses, Muhammad Ayoub, Sami Ullah, Ahmad Z. Abdullah, Salman R. Naqvi, Aamir H. Bhat
Summary: This study explores the impact of different Co3O4-based catalysts on the catalytic decomposition of nitrous oxide (N2O) and the conversion of nitric oxide (NO). The results indicate that Co3O4 catalysts prepared through precipitation methods exhibit the highest activity and N2O conversion, even at low reaction temperatures, while commercial nano and powder forms of Co3O4 (CS) perform the poorest. The catalysts lose effectiveness below 400 degrees C, with their activity being greatly influenced by the mixing temperature. The findings offer valuable insights for designing and optimizing catalytic systems for N2O and NO control.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Energy & Fuels
Junghyun Kim, Kyoungdoug Min
Summary: The low-temperature combustion technique is effective in improving engine efficiency by reducing thermal and exhaust losses. Lean burn, as a representative method of this technique, has faced limitations due to poor initial ignition stability. In this study, the importance of ignition delay in lean burn engines was emphasized, and the primary sources of ignition delay were identified as flow velocity near the spark plug and subgrid-scale turbulent kinetic energy. Parameters affecting the burn duration were analyzed, and potential methods to reduce cycle-to-cycle variation (CCV) were proposed, such as enhancing tumble motion and adjusting the injector target.
Article
Chemistry, Physical
Saburo Hosokawa, Yudai Oshino, Toyokazu Tanabe, Hiroaki Koga, Kosuke Beppu, Hiroyuki Asakura, Kentaro Teramura, Teruki Motohashi, Mitsutaka Okumura, Tsunehiro Tanaka
Summary: The strong metal-support interaction can lead to negative outcomes such as decreased catalytic activity for platinum group metal nanoparticles; however, in this study, the Mn-doped CaO(111) plane exhibited excellent catalytic activity for NO reduction despite the absence of a Pd metal surface, providing a new design guideline for environmental catalysts.
Article
Chemistry, Physical
Md Nur Alam Mondal, Nader Karimi, S. David Jackson, Manosh C. Paul
Summary: The premixed combustion of hydrogen/air over a Pt catalyst in a planar channel burner was numerically investigated. The aim was to stabilize the flame at lean to ultra-lean conditions. A species transport model with heterogeneous and homogeneous chemical reaction schemes was used and validated against experimental results. The study found that with the Pt catalyst coated on the walls, complete H2 combustion is achieved within a certain range of equivalence ratios and the contribution of gas phase reactions increases with Reynolds number. The presence of radiation affects combustion kinetics and flame temperature, while NOx emission increases with equivalence ratio.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Polymer Science
Rok Mravljak, Ozbej Bizjak, Benjamin Bozic, Matejka Podlogar, Ales Podgornik
Summary: Continuous catalytic reactors offer more efficiency and control compared to batch operation, with high internal phase emulsion polymer materials containing an immobilized silver catalyst used for this purpose. Investigation revealed that the mass of deposited silver is dependent on aldehyde concentration and Tollens reagent composition, with nanoparticles showing high crystallinity and uniform surface coverage. The example of 4-nitrophenol catalytic reduction in a continuous process demonstrated productivity increase with volumetric silver density and flow rate, while maintaining efficiency during prolonged usage and storage.
Article
Chemistry, Applied
Jia Ding, Xu Huang, Qilei Yang, Lizhuo Wang, Yue Peng, Junhua Li, Jun Huang
Summary: In this study, a series of Cu-ZSM-5/Al-fiber catalysts with different Si/Al molar ratios were synthesized and their performance in NH3-SCR reaction was studied. The higher Si/Al molar ratio catalysts showed superior NH3 adsorption capacity and enhanced NOx degradation activity. The microstructured Cu-ZSM-5 catalysts exhibited better NH3-SCR performance at moderate temperatures under higher gas hourly space velocity, indicating improved mass transfer properties.
Article
Energy & Fuels
Fanghui Wang, Xiaoran Wang, Zhijun Guo, Jinghua Yu, Hong Zhu
Summary: A Mo-PtCu catalyst with an octahedral morphology was prepared through a hydrothermal reaction, showing higher catalytic activity and durability due to the addition of Mo. The Mo0.02-PtCu/C catalyst exhibited improved mass activity, excellent oxygen reduction reaction rate, and durability, with a small amount of Mo preventing platinum and copper atoms from dissolving, thus enhancing the ORR performance of the catalyst.
Article
Environmental Sciences
Se Won Jeon, Inhak Song, Hwangho Lee, Do Heui Kim
Summary: Vanadium oxide-based catalysts, such as V/MPTiO2, are promising for SCR of NO with NH3. Addition of W and Mo as promoters to V/MPTiO2 can enhance deNO(x) activities at low temperatures, while Sb tends to have a negative effect on SCR activity. The addition of W and Mo increases the polymerization in V/MPTiO2, generating more reactive vanadia species and leading to enhanced catalytic activity at low temperatures.
Article
Chemistry, Physical
Magdalena Saramok, Marek Inger, Katarzyna Antoniak-Jurak, Agnieszka Szymaszek-Wawryca, Bogdan Samojeden, Monika Motak
Summary: In modern dual-pressure nitric acid plants, the high tail gas temperature poses challenges for the catalyst used. This study explores the use of a novel iron-modified zeolite catalyst as an alternative to commercial catalysts for reducing NOx emissions. The results show that the presence of various iron species contributes to efficient NOx reduction.
Review
Chemistry, Applied
Xiangbo Feng, Lei Jiang, Danyang Li, Shaopeng Tian, Xing Zhu, Hua Wang, Chi He, Kongzhai Li
Summary: Methane, as a primary type of clean energy, is the second most important greenhouse gas after CO2. Large quantities of lean methane are emitted into the atmosphere during coal mine, oil, and natural gas production, leading to energy loss and greenhouse effect. Utilizing lean methane is challenging, but catalytic combustion is a vital pathway to reduce emissions. This review discusses the development, challenges, and prospects of catalytic lean methane combustion technology, with a focus on heat management from the perspective of material design and reactor configuration.
JOURNAL OF ENERGY CHEMISTRY
(2022)
Article
Engineering, Environmental
Alexei G. Makeev, Natalia L. Semendyaeva, Marina M. Slinko
CHEMICAL ENGINEERING JOURNAL
(2015)
Article
Chemistry, Physical
Alexei G. Makeev, Nickolai V. Peskov, Hiromichi Yanagihara
APPLIED CATALYSIS B-ENVIRONMENTAL
(2012)
Article
Mathematics, Applied
Alexei G. Makeev, Elena S. Kurkina, Ioannis G. Kevrekidis
Article
Mathematics, Applied
A. G. Makeev, N. L. Semendyaeva
COMPUTATIONAL MATHEMATICS AND MATHEMATICAL PHYSICS
(2009)
Article
Computer Science, Interdisciplinary Applications
Christophe Vandekerckhove, Benjamin Sonday, Alexei Makeev, Dirk Roose, Ioannis G. Kevrekidis
COMPUTERS & CHEMICAL ENGINEERING
(2011)
Article
Computer Science, Interdisciplinary Applications
Alexei G. Makeev, Ioannis G. Kevrekidis
COMPUTERS & CHEMICAL ENGINEERING
(2014)
Article
Chemistry, Physical
Alexei G. Makeev, Ioannis G. Kevrekidis
Article
Chemistry, Physical
Alexei G. Makeev, Marina M. Slinko, Dan Luss
APPLIED CATALYSIS A-GENERAL
(2019)
Article
Engineering, Chemical
Alexei G. Makeev, Nickolai Peskov, Natalia L. Semendyaeva, Marina M. Slinko, Victor Yu Bychkov, Vladimir N. Korchak
CHEMICAL ENGINEERING SCIENCE
(2019)
Article
Chemistry, Physical
Alexei G. Makeev, Marina M. Slinko
Article
Physics, Fluids & Plasmas
Alexei Makeev, Ronald Imbihl
Article
Engineering, Chemical
AG Makeev, IG Kevrekidis
CHEMICAL ENGINEERING SCIENCE
(2004)
Article
Engineering, Chemical
CI Siettos, A Armaou, AG Makeev, IG Kevrekidis
Article
Engineering, Chemical
A Bindal, MG Ierapetritou, S Balakrishnan, A Armaou, AG Makeev, IG Kevrekidis
CHEMICAL ENGINEERING SCIENCE
(2006)
Article
Chemistry, Physical
Bolun Yu, Denan Li, Qianqian Zhu, Shufan Yao, Lifeng Zhang, Yanshuo Li, Zhenxin Zhang
Summary: This study successfully improved the catalytic activity of a zeolitic octahedral metal oxide by incorporating a single zinc species into its micropore. The zinc incorporation achieved a high ethane conversion rate and ethylene selectivity. Mechanism study showed that the isolated zinc site played a crucial role in activating oxygen and ethane, as well as stabilizing intermediates and transition states.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Ruoqi Liu, Hao Fei, Jian Wang, Ting Guo, Fangyang Liu, Zhuangzhi Wu, Dezhi Wang
Summary: This work successfully synthesized a high-performing S-enriched MoS2 catalyst for electrocatalytic nitrogen reduction reaction (NRR), demonstrating high activity and selectivity. The synergistic effect of the 1T phase and bridging S22- species was shown to play a positive role in NRR performances, and DFT calculations revealed the mechanism behind the improved performance.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Pan Xia, Lele Zhao, Xi Chen, Zhihong Ye, Zhihong Zheng, Qiang He, Ignasi Sires
Summary: This study presents a modified gas-diffusion electrode (GDE) for highly efficient and stable H2O2 electrosynthesis by using trace polymethylhydrosiloxane (PMHS). DFT calculations provide an in-depth understanding of the roles of PMHS functional groups.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Kwangchol Ri, Songsik Pak, Dunyu Sun, Qiang Zhong, Shaogui Yang, Songil Sin, Leliang Wu, Yue Sun, Hui Cao, Chunxiao Han, Chenmin Xu, Yazi Liu, Huan He, Shiyin Li, Cheng Sun
Summary: Different B-doped rGO catalysts were synthesized and their 2e- oxygen reduction reaction (ORR) performance was investigated. It was found that the 2e- ORR selectivity of B-doped rGO was influenced by the B content and oxygen mass transfer conditions. The synthesized catalyst exhibited high 2e- ORR selectivity and was capable of degrading organic pollutants continuously.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Li Lv, Lin Lei, Qi-Wen Chen, Cheng-Li Yin, Huiqing Fan, Jian-Ping Zhou
Summary: Monoclinic phase La2Ti2O7 and orthorhombic phase Bi4Ti3O12 are widely used in photocatalysis due to their layered crystal structure. The electronic structures of these phases play a crucial role in their photocatalytic activity. Heat treatment in a nitrogen atmosphere introduces more oxygen vacancies into the S-scheme heterojunction, leading to enhanced NO removal efficiency.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Choe Earn Choong, Minhee Kim, Jun Sup Lim, Young June Hong, Geon Joon Lee, Keun Hwa Chae, In Wook Nah, Yeomin Yoon, Eun Ha Choi, Min Jang
Summary: In this study, the synergistic effect between argon-plasma-system (AP) and catalysts in promoting the production of reactive species for water remediation was investigated. By altering the oxygen vacancies concentration of CeO2/Bi2O3 catalyst, the production of hydrated electrons was stimulated for PFOA removal. The results showed that the built-in electric field in the Bi/Ce0.43 interface enhanced electron migration and eaq- generation, leading to improved PFOA removal efficiency.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Yushan Wu, Di Xu, Yanfei Xu, Xin Tian, Mingyue Ding
Summary: Efficient synthesis of primary amines from carbonyl compounds was achieved via reductive amination using Ru@NC-Al2O3 as a catalyst, exhibiting high activity and selectivity under mild conditions.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Yilan Jiang, Peifang Wang, Tingyue Chen, Keyi Gao, Yiran Xiong, Yin Lu, Dionysios D. Dionysiou, Dawei Wang
Summary: By controlling the content of Co and Ni in Co1-xNixFe2O4, the production of O-1(2) from H2O2 can be regulated. NiFe2O4, with the lowest lattice distortion degree, can efficiently produce O-1(2) as the dominant reactive oxygen species. The system also exhibits significant resistance to water matrix interference.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Shuai Feng, Donglian Li, Hao Dong, Song Xie, Yaping Miao, Xuming Zhang, Biao Gao, Paul K. Chu, Xiang Peng
Summary: In this study, MoO2/Mo2N heterostructures were prepared by regulating the coordination of Mo atoms. The electrocatalyst exhibits high current density and excellent stability for hydrogen evolution reaction.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Jia-Cheng E. Yang, Min -Ping Zhu, Daqin Guan, Baoling Yuan, Darren Delai Sun, Chenghua Sun, Ming-Lai Fu
Summary: This study successfully modulated the electron configuration and spin state of millimetric metal catalysts by adjusting the support curvature radius. The electronic structure-oriented spin catalysis was found to affect the degradation of pollutants, providing new insights for the design and production of highly active, reusable, and stable catalysts.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Tao Zhong, Su Tang, Wenbin Huang, Wei Liu, Huinan Zhao, Lingling Hu, Shuanghong Tian, Chun He
Summary: In this study, a highly efficient photocatalyst for the elimination of CH3SH was developed by engineering different crystal facets and coupling them with PHI. Cu (111)/PHI exhibited the highest elimination efficiency and showed good stability and reusability. The enhanced surface electron pump effect and effective adsorption mechanisms were revealed through comprehensive characterizations and DFT calculations.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Feifei Yang, Tianyu Zhang, Jiankang Zhao, Wei Zhou, Nicole J. Libretto, Jeffrey T. Miller
Summary: A Ni3Sn intermetallic nano particle was found to have geometrically isolated Ni sites that could selectively cleave C-O bonds in biomass derivatives. This nano particle showed high activity and selectivity towards 2-methylfuran, unlike Ni nanoparticles that produced other unwanted products derived from the aromatic rings.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2024)
Article
Chemistry, Physical
Lulu Qiao, Di Liu, Anquan Zhu, Jinxian Feng, Pengfei Zhou, Chunfa Liu, Kar Wei Ng, Hui Pan
Summary: This study reveals that surface evolution plays a crucial role in enhancing the electrocatalytic performance of transition metal oxides for electrochemical nitrate reduction reaction (e-NO3RR). Incorporating nickel into Co3O4 can promote surface reconstruction and improve the adsorption of intermediates and reduce energy barriers, leading to enhanced catalytic performance. The reconstructed cobalt-nickel hydroxides (CoyNi1_y(OH)2) on the catalyst's surface serve as the active phase.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2024)
Article
Chemistry, Physical
Xinyu Song, Yang Shi, Zelin Wu, Bingkun Huang, Xinhao Wang, Heng Zhang, Peng Zhou, Wen Liu, Zhicheng Pan, Zhaokun Xiong, Bo Lai
Summary: This study explores the discriminative activities and mechanisms for activation of O-O bond in peroxy compounds via single-atom catalysts (SACs) with higher coordination numbers (M-N5). The atomic catalyst (Fe-SAC) with Fe-N5 as the active center was constructed, effectively activating peroxymonosulfate (PMS), peroxydisulfate (PDS), and hydrogen peroxide (H2O2). The study demonstrates the degradation efficiencies of acyclovir are related to the O-O bond length in different peroxy compounds, and reveals the discriminative mechanisms for activation of O-O bond in different Fenton-like systems.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2024)
Article
Chemistry, Physical
Yangzhuo He, Hong Qin, Ziwei Wang, Han Wang, Yuan Zhu, Chengyun Zhou, Ying Zeng, Yicheng Li, Piao Xu, Guangming Zeng
Summary: A dual-metal-organic framework (MOF) assisted strategy was proposed to construct a magnetic Fe-Mn oxycarbide anchored on N-doped carbon for peroxymonosulfate (PMS) activation. The FeMn@NC-800 catalyst exhibited superior activity with almost 100% degradation of sulfamethazine (SMZ) in 30 minutes. The study provided insights for the rational design of high-performance heterogeneous catalysts and proposed a novel nonradical-based catalytic oxidation for environmental cleaning.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2024)