Article
Environmental Sciences
Bilal Asif, Muhammad Zeeshan, Sidra Iftekhar, Mika Sillanpaa
Summary: The study evaluates the impact of CeO2 doping on the performance of Co3O4/TiO2 composite catalyst and its efficiency improvement in three-way catalytic conversion. The doping of CeO2 significantly enhances the surface area of the catalyst, leading to improved conversion efficiency of the three exhaust gases.
ATMOSPHERIC POLLUTION RESEARCH
(2021)
Article
Energy & Fuels
Sviatoslav Kryshtopa, Krzysztof Gorski, Rafal Longwic, Ruslans Smigins, Liudmyla Kryshtopa, Jonas Matijosius
Summary: This study focuses on converting diesel power drives to diesel-hydrogen fuels, which are more environmentally friendly and cost-effective. By using methanol as an alternative fuel, the energy efficiency of diesel fuels is improved. Experimental results demonstrate the feasibility of converting diesel engines to operate using diesel-hydrogen products and show significant improvement in environmental performance.
Article
Energy & Fuels
Damian Kurzydym, Zbigniew Zmudka, Diego Perrone, Adam Klimanek
Summary: The article presents a study on the reduction of nitrogen oxides in diesel car SCR system. Both experimental and numerical methods were used to analyze the system and compare it with European emission standards. The results show that the final design of the replacement part effectively reduces NOX emissions.
Article
Engineering, Environmental
Yan Lei, Chao Qin, Tao Qiu, Guangzhao Yue, Mengzhu Ding
Summary: A distributed control system (DCS) method is proposed to address NOx emissions from a diesel engine group in industrial applications. The control algorithm distributes real-time NOx conversion efficiency to each unit to control emissions within standard limits and achieve good economic performance.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Thermodynamics
S. V. Karthic, M. Senthil Kumar
Summary: This research work adopted various strategies to reduce emissions from diesel engines, such as online injection timing/pressure variation, split injection, and nano-emulsion, successfully achieving emission levels close to or equal to Euro VI standards.
Article
Chemistry, Multidisciplinary
Jihene Arfaoui, Abdelhamid Ghorbel, Carolina Petitto, Gerard Delahay
Summary: Higher NO-SCR performances can be obtained between 200 and 500 degrees C over the new ternary MoO3-CeO2-ZrO2 and WO3-CeO2-ZrO2 catalysts. Above 90 % NO conversions into essentially N-2 (>= 97 %) are achieved between 350 and 500 degrees C over the most efficient MoO3-CeO2-ZrO2 ternary catalyst.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Energy & Fuels
Suozhu Pan, Jiangjun Wei, Changfa Tao, Gang Lv, Yejian Qian, Qiang Liu, Weiqiang Han
Summary: This study investigates the effects of cerium oxide nanoparticles on the performance and emissions of a diesel engine. The results show that methanol-based nanofluids with CeO2 nanoparticles can improve engine thermal efficiency and reduce emissions compared to pure methanol mode.
Article
Energy & Fuels
Qiuhong Tong, Hao Chen, Jingjing He, Xin Su, Zhao Wei, Fengyu Sun, Hongming Xu, Feng Wang
Summary: Blending cyclopentanone with diesel can prolong ignition delay, increase peak heat release rate, and peak in-cylinder temperature; emission tests show that it can effectively reduce particle number concentrations and volume concentrations, with lower number geometric mean diameters compared to pure diesel; however, there is a slight increase in NOx emissions observed.
Article
Thermodynamics
Md. Nurun Nabi, Wisam K. Hussam, Hasan Mohammad Mostofa Afroz, Adib Bin Rashid, Jahidul Islam, A. N. M. Mominul Islam Mukut
Summary: This study investigated the engine performance and emissions of waste tire oil-diesel-biodiesel blends, finding that the maximum blending limit for waste tire pyrolysis oil was 30% in diesel fuel.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Chemistry, Applied
Yiyang Zhang, Jiawei Chen, Zhiming Liu
Summary: PtIr/TiO2 catalyst exhibits higher activity and wider temperature range in H2-SCR process. The optimum mass ratio of Pt/Ir is 1:1. Characterization of the catalyst reveals the presence of metallic Pt and Ir on PtIr/TiO2, as well as the formation of more active species.
Article
Environmental Sciences
Meixuan Wu, Ziyu Zhao, Peng Zhang, Mingding Wan, Jilin Lei, Bo Pan, Baoshan Xing
Summary: Research on the emission characteristics of environmental persistent free radicals (EPFRs) from diesel engines at different working conditions is limited. Lower engine speed and higher altitude are generally associated with higher PM10 emissions with more stable and ordered structures. EPFRs intensity in particles showed no significant change in dark, and over 70% of the EPR signals survived under UV light in a one-month aging simulation, suggesting potential long lasting and widespread risks that should be investigated extensively.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Chemistry, Physical
Chao Sun, Guangfeng Wei, Huimin Liu, Zhen Huang, Feng Qin, Haitao Wang, Jing Zhao, Zhipan Liu, Linjuan Zhang, Haisheng Yu, Binghui Ge, Wei Shen, Hualong Xu
Summary: A TiO2-Pt-1-CeO2 ensemble with unprecedented reactivity was constructed using the phase junction confinement principle, enabling high efficiency in CO oxidation through weakened CO affinity, enhanced surface lattice oxygen reactivity, and lowered reaction barrier. This work demonstrates a plausible synthesis philosophy and reaction mechanism for SACs, creating a new frontier in reactivity.
CATALYSIS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Mingyun Zhu, Yifeng Wen, Lei Shi, Zhiyuan Tan, Yuting Shen, Kuibo Yin, Litao Sun
Summary: Mn-modified CeO2 nanomaterials have attracted attention as catalysts for soot combustion due to their low cost and high activity. However, the mechanism of how Mn promotes soot oxidation over CeO2 is still unclear. In this study, Mn-doped CeO2 catalysts with tunable surface Mn chemical valence states were used to investigate the Mn-promoting mechanism for improving catalyst activity. The results showed that Mn-doped CeO2 nanorods with optimized surface Mn chemical valence states exhibited lower temperatures for soot elimination and resistance towards water molecules. The study provides insights for the design of efficient catalysts to eliminate soot particles.
Article
Thermodynamics
Simon Poellmann, Martin Haertl, Malte Jaensch, Georg Wachtmeister
Summary: The use of CO2-neutral synthetic fuels in internal combustion engines helps achieve climate goals. Current research focuses on reducing pollutant emissions and improving combustion efficiency. Soot-free combustion of oxymethylene ether (OME) as a synthetic diesel fuel can significantly reduce nitrogen oxide emissions. Various in-engine measures, such as increasing exhaust gas recirculation, lowering rail pressure, adjusting valve timing, and increasing compression ratio, can effectively reduce nitrogen oxide emissions and improve efficiency.
INTERNATIONAL JOURNAL OF ENGINE RESEARCH
(2023)
Review
Energy & Fuels
M. Sunil Kumar, M. S. Alphin, S. Manigandan, S. Vignesh, S. Vigneshwaran, T. Subash
Summary: Emission plays a crucial role in air pollution and its impact on living organisms. Selective Catalytic Reduction (SCR) is a commonly used technology to reduce Nitrogen Oxides (NOx) emissions in internal combustion engines. This review examines various catalysts used in SCR, including metal-based catalysts and zeolite-based catalysts, and explores their performance and characteristics in terms of GHSV, efficiency at different temperature ranges, percentage doping, and NOx conversion efficiency. The review concludes that zeolite catalysts show excellent deNOx efficiency, with 2 to 4 wt% doping of Cu achieving around 95% deNOx and doping of Fe widening the operating temperature range.
Article
Chemistry, Applied
Jingjing Liu, Yanlong Huo, Xiaoyan Shi, Zhongqi Liu, Yulong Shan, Yunbo Yu, Wenpo Shan, Hong He
Summary: A series of Ce-Sn catalysts modified with W were prepared and studied for the SCR of NOx by NH3. The Ce-W-Sn catalysts showed higher deNOx efficiency than the Ce-Sn catalysts, and the Ce1W0.24Sn2Ox catalyst prepared by coprecipitation displayed the highest NOx conversion. The mechanism by which W modification improved the structure and function of the Ce1Sn2Oy catalyst was investigated, revealing the promotion of t-Sn(Ce)O2 active phase formation and the inhibition of c-Ce(Sn)O2 phase generation by W species. Additionally, the highly dispersed W species on the Ce1W0.24Sn2Ox catalyst surface formed new Ce-O-W active sites, contributing to enhanced NH3-SCR performance and the suppression of excess NH3 oxidation.
Article
Environmental Sciences
Guangyan Xu, Wenpo Shan, Yunbo Yu, Yulong Shan, Xiaodong Wu, Ye Wu, Shaojun Zhang, Liqiang He, Shijin Shuai, Hailong Pang, Xuefeng Jiang, Heng Zhang, Lei Guo, Shufen Wang, Feng-Shou Xiao, Xiangju Meng, Feng Wu, Dongwei Yao, Yan Ding, Hang Yin, Hong He
Summary: Diesel vehicles in China have caused serious environmental problems, prompting the government to take serious actions against air pollution and impose stricter regulations on diesel vehicle emissions in the latest China VI standard. To comply with these regulations, two major technical routes, EGR and SCR, have been developed for diesel engines. Additionally, complicated aftertreatment technologies, including DOC, DPF, SCR, and ASC, have been developed for emission control. Integration of the aftertreatment system with the engine system is necessary to meet the stringent requirements of the China VI standard, and further upgrades will be needed for near-zero emission targets in the future.
JOURNAL OF ENVIRONMENTAL SCIENCES
(2023)
Article
Environmental Sciences
Zhisheng Wang, Yingfa Chen, Xiaotong Li, Jinzhu Ma, Guangzhi He, Hong He
Summary: Ground-level ozone is harmful and can be effectively decomposed using room-temperature catalytic decomposition. A two-dimensional NiFe layered double hydroxide (NiFe-LDH) catalyst was successfully prepared and exhibited stable and efficient ozone decomposition performance.
JOURNAL OF ENVIRONMENTAL SCIENCES
(2023)
Article
Chemistry, Physical
Qiaoqi Guo, Ying Luo, Jun Xu, Lidan Deng, Zheng Wang, Hong He
Summary: Photocatalytic conversion of low-concentration CO2 with H2O oxidation is an effective method to achieve sustainable carbon cycling and address the global warming issue. Improving charge separation, surface adsorption, and catalytic process of photocatalysts is crucial to overcome the mass transfer limitation during the conversion of low-concentration CO2. In this study, a highly-crystalline AgxNa1_xTaO3-AgCl heterostructure composite was fabricated, which facilitated the separation and transfer of photogenerated charges. The introduction of Ag cations and AgCl components enhanced the adsorption and activation of CO2 on the surface of the photocatalyst. When combined with metallic Ag cocatalysts, the AgxNa1_xTaO3-AgCl heterostructure photocatalyst exhibited improved activity for CO2 reduction and H2O oxidation at low CO2 concentration conditions. The development of photocatalysts active at low CO2 concentration provides an alternative approach for practical CO2 conversion systems in the future.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Engineering, Environmental
Maofan Li, Meng Gao, Guangzhi He, Yunbo Yu, Hong He
Summary: Mn doping can significantly enhance the low-temperature NH3-SCR activity of Ce-based oxide catalysts, providing important insights for the development of low-temperature Ce-based catalysts.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Qing Cao, Biwu Chu, Peng Zhang, Qingxin Ma, Jinzhu Ma, Yuan Liu, Jun Liu, Yaqi Zhao, Hong Zhang, Yonghong Wang, Hong He
Summary: The reducibility of SO2 and its acidic products inhibit the production of reactive nitrogen in the photolysis of nitrate, affecting the renoxification process. SO2 has an inhibitory effect on the production of NOx, HONO, and NH3 in the photolysis of ammonium nitrate on different substrates. The interaction between the heterogeneous oxidation of SO2 and nitrate photolysis provides a new perspective on how SO2 affects the photolysis of nitrate absorbed on photoactive oxides.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Energy & Fuels
Jie Li, Yan Zhang, Wenpo Shan, Hong He
Summary: A series of mesoporous Pd/Al2O3 and Pd/MgAl2O4 catalysts with different palladium contents (0.5, 1 and 4 wt%) were prepared and used for methane combustion. The 1Pd/MgAl2O4 (1 wt% Pd) catalyst showed highly efficient catalysis for methane combustion below 450 degrees C, with a low apparent activation energy of around 50.1 kJ/mol and good thermal stability. The superior catalytic performance of Pd/MgAl2O4 can be attributed to the strong interaction between the MgAl2O4 spinel and PdO species, which promotes species dispersion and stability. In addition, the catalytic activity of Pd/MgAl2O4 showed a volcano-shaped dependence on the size of Pd particles, indicating the importance of strong metal-support interaction.
Article
Geosciences, Multidisciplinary
Yonghong Wang, Yongjing Ma, Chao Yan, Lei Yao, Runlong Cai, Shuying Li, Zhuohui Lin, Xiujuan Zhao, Rujing Yin, Chenjuan Deng, Juha Kangasluoma, Xu-Cheng He, Simo Hakala, Xiaolong Fan, Siyu Chen, Qingxin Ma, Veli-Matti Kerminen, Tuukka Petaejae, Jinyuan Xin, Lin Wang, Baoxian Liu, Weigang Wang, Maofa Ge, Jingkun Jiang, Yongchun Liu, Federico Bianchi, Biwu Chu, Neil M. Donahue, Scot T. Martin, Hong He, Markku Kulmala
Summary: New particle formation (NPF) is a global phenomenon that affects climate and contributes to haze, impacting human health. In Beijing, NPF occurs surprisingly during haze days due to high levels of sulfuric acid dimers. The mixing of sulfur dioxide from the residual layer enhances ground level sulfuric acid dimer formation, bridging a gap in understanding NPF in polluted atmospheres.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Chemistry, Physical
Qi An, Guangyan Xu, Jianhua Liu, Yingjie Wang, Yunbo Yu, Hong He
Summary: In this study, a bifunctional Pt/Cu-SSZ-13 catalyst with catalytic selectivity and selective catalytic reduction function was successfully prepared. The catalyst exhibited excellent catalytic performance during NH3 oxidation under practical conditions containing water vapor, achieving >85% N2 selectivity over the whole temperature range.
Article
Chemistry, Physical
Shuangye Li, Liyun Song, Jian Li, Hong He
Summary: A series of NdV/Ti-x% catalysts were prepared by a microwave-assisted deposition-precipitation method and their catalytic performance for the selective catalytic reduction (SCR) of NO by NH3 was investigated. The amount of vanadate added significantly influenced the SCR activity of the catalyst. The NdV/Ti-x% catalysts demonstrated good low-temperature catalyst activities and excellent SO2 resistance performances.
Article
Forestry
Kai Liu, Hong S. He, Hang Sun, Jingfeng Wang
Summary: Predatory seed harvesting (PSH) in the past 20 years has significantly affected the restoration and sustainable management of the mixed Korean pine and broadleaf forest. The historical PSH decreased the dominance of Korean pine and increased the dominance of spruce and fir, altering the succession trajectories of the disturbed stands. Future forest management should restrict the intensity and rotation of seed harvesting, and consider direct seeding or seedling planting for the recovery and sustainable management of the mixed Korean pine and broadleaf forest.
Article
Engineering, Environmental
Zhuocan Li, Meng Gao, Zhihui Lv, Rucheng Duan, Yulong Shan, Hongwei Li, Guangzhi He, Hong He
Summary: This study reveals the active sites and working principle of commercial vanadium oxide catalysts in the fast SCR reaction through experimental and computational methods. It demonstrates that polymeric vanadyl species act as the main active sites and provides a fundamental basis for developing high-efficiency and low V2O5-loading SCR catalysts.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Tianzeng Chen, Jun Liu, Biwu Chu, Yanli Ge, Peng Zhang, Qingxin Ma, Hong He
Summary: Secondary organic aerosol (SOA) is an important component of atmospheric fine particulate matter (PM2.5), and its physicochemical properties change significantly during the aging process. By studying the continuous aging process of gas-phase organic intermediates and SOA formed from the photooxidation of toluene, it was found that the SOA mass concentration and corrected SOA yield were significantly enhanced as the OH exposure increased. Organic acids and multiple oxygen-containing oxidation products were continuously produced during the aging process, and functionalization of SOA dominated in the photochemical aging process. This study suggests that SOA yields as a function of OH exposure should be considered in air quality models to accurately assess their impact on SOA properties and regional air quality.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Zhi Liu, Yingsheng An, Guangyan Xu, Yunbo Yu, Hong He
Summary: The enhancement mechanism of the C3H6-SCR activity of Ag/Al(2)O(3) by Pd doping and the corresponding structure-property relationship were investigated. Pd doping changed the reaction pathway and improved the water resistance of the catalyst, leading to the formation of a different active intermediate, an enolic species. The study provides valuable insights for the design of efficient HC-SCR catalysts.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Zhi Liu, Yingsheng An, Guangyan Xu, Yunbo Yu, Hong He
Summary: The mechanistic cause of the enhancement of the C3H6-SCR activity of Ag/Al2O3 by trace Pd doping and the corresponding structure-property relationship were investigated. Pd doping enhanced the water resistance of Ag/Al2O3 for C3H6-SCR by changing the reaction pathway. Under wet conditions, a series of in situ DRIFT studies indicated that the production of an active acetate intermediate on Ag/Al2O3 was suppressed during the partial oxidation of C3H6, while trace Pd doping promoted the formation of another active intermediate, an enolic species. Furthermore, a pathway for the formation of enolic species by the reaction of acrylate with hydroxyl species was proposed. DFT calculations revealed that the surface of Ag clusters was easily covered by hydroxyl in the presence of water vapor, which could inhibit the formation of acetates. Doping with Pd facilitated the activation of acrylate which might further react with hydroxyl species to form enolic species. These findings can be helpful for the future design of efficient HC-SCR catalysts.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Applied
Qingyuan Zheng, Jack H. Williams, Scott Elgersma, Mick D. Mantle, Andrew J. Sederman, G. Leendert Bezemer, Constant M. Guedon, Lynn F. Gladden
Summary: In this study, a pilot-scale fixed-bed reactor compatible with NMR/MRI was developed for Fischer-Tropsch synthesis. Multiple magnetic resonance techniques were applied to quantitatively characterize different product species within catalyst pellets, providing valuable information for catalyst and reactor optimization.
Article
Chemistry, Applied
Lisa Ramisch, Sebastian Pfaff, Sabrina M. Gericke, Edvin Lundgren, Johan Zetterberg
Summary: We present a combination of optical operando techniques that allow simultaneous measurement of adsorbed species on catalyst surfaces, monitoring of surface oxide formation, and imaging of the gas phase above the catalyst surface. The experimental setup was validated by studying CO oxidation on Pd(100) at different pressures, revealing the effects of pressure on the heterogeneous catalytic reaction.
Article
Chemistry, Applied
Marta Paniagua, Gabriel Morales, Juan A. Melero, Daniel Garcia-Salgado
Summary: The influence of common impurities in levulinic acid on the catalytic performance of different acid catalysts for bio-jet fuel production was studied. It was found that furfural had the greatest detrimental effect on catalyst performance, while propyl-sulfonic acid-modified SBA-15 and sulfonic acid resin Amberlyst-70 showed good regeneration ability.
Article
Chemistry, Applied
Jesus Tapiador, Pedro Leo, Guillermo Calleja, Gisela Orcajo
Summary: This study presents a new MOF material, Zn-URJC-13, with acid and basic sites, permanent porosity, and high affinity to CO2 molecules. The Zn-URJC-13 catalyst exhibits efficient performance in CO2 cycloaddition reactions and can be reused multiple times.
Article
Chemistry, Applied
Dan Zhao, Vita A. Kondratenko, Dmitry E. Doronkin, Shanlei Han, Jan-Dierk Grunwaldt, Uwe Rodemerck, David Linke, Evgenii V. Kondratenko
Summary: This study demonstrates the potential of cheap and commercially available Zr or Ti-based supports and ZnO to serve as active and selective catalysts for propane dehydrogenation (PDH). The catalytically active species formed in situ under PDH conditions consist of isolated ZnOx. ZnOx on the surface of LaZrOx shows the highest rate of propene formation.
Article
Chemistry, Applied
Hanbyeol Kim, Jung Rae Kim, Young-Kwon Park, Jeong-Myeong Ha, Jungho Jae
Summary: In this study, metal phosphates were used as catalysts for biomass conversion to produce sustainable aromatics through DielsAlder cycloaddition reactions. The effects of synthesis method, activation method, and P/Ti molar ratio on the structure and acid properties of titanium phosphate catalysts were systematically studied. The mesoporous titanium phosphate catalyst synthesized by hydrothermal method at 180℃ for 12 h followed by ethanol refluxing at 60℃ for 24 h at a molar P/Ti ratio of 1 showed the highest surface area and acid site density.
Article
Chemistry, Applied
Yasin Khani, Sumin Pyo, Kwang-Eun Jeong, Chul-Ung Kim, Moonis Ali Khan, Byong-Hun Jeon, Kun-Yi Andrew Lin, Siyoung Q. Choi, Young-Kwon Park
Summary: A protonated form of Zeolite Socony Mobil-5 (H-ZSM-5) catalyst was synthesized through a hydrothermal method using different sources of silica. The effect of loading the catalyst with yttrium, samarium, and gadolinium on the acidic properties was investigated. Among the metal-loaded catalysts, the Sm/LHZ catalyst showed the best performance in the methanol to propylene conversion due to its high amount of weak and intermediate acid sites, while the Gd-LHZ catalyst increased the selectivity towards ethane and propane.
Article
Chemistry, Applied
Michael Franc, Ivana Cisarova, Jan Vesely
Summary: The present study investigates an enantioselective cyclization of enals with imidazolone derivatives catalyzed by a combination of achiral Pd(0) complex and chiral secondary amine. Corresponding spirocyclic imidazolones were produced in high yields with moderate diastereoselectivity and excellent enantioselectivity. The developed co-operative catalytic methodology provides a highly substituted spirocyclic scaffold with four stereogenic centers under mild conditions.
Article
Chemistry, Applied
Mauro Alvarez, Jennifer Cueto, David P. Serrano, Pablo Marin, Salvador Ordonez
Summary: This study focuses on improving the formulation and preparation methods of catalysts for the production of dimethyl carbonate. By using suitable catalyst preparation methods and copper salt precursors, the researchers successfully produced catalysts with optimal performance for dimethyl carbonate formation.
Article
Chemistry, Applied
Claudia J. Keijzer, Luc C. J. Smulders, Dennie Wezendonk, Jan Willem de Rijk, Petra E. de Jongh
Summary: This study investigates the catalytic behavior of alpha-alumina supported silver catalysts in the presence of chloride. It is found that the particle size of silver can affect the selectivity of the catalyst, but different strategies lead to different results. In this size range, the selectivity of ethylene oxide is correlated to the Ag : Al2O3 surface ratio.
Article
Chemistry, Applied
Takeshi Aihara, Wataru Aoki, Michikazu Hara, Keigo Kamata
Summary: The development of acid-base bifunctional catalysts is important for promoting specific chemical transformations. In this study, Ti-based perovskite oxides were synthesized and used as catalysts for two C-C bond-forming reactions (cyanosilylation and Knoevenagel condensation). The highly pure SrTiO3 nanoparticles with a high specific surface area exhibited the highest catalytic performance, and could be easily recovered and reused.
Article
Chemistry, Applied
Olga Gorlova, Petra Pribylova, Eliska Vyskocilova, Katerina Peroutkova, Jan Kohout, Iva Paterova
Summary: This study investigates the Baeyer-Villiger oxidation of beta-cyclocitral using tin-modified mixed oxides as catalysts. The optimal reaction conditions and the effects of various factors on the reaction course and selectivity were determined. The results show that tin-modified mixed oxides exhibit high activity and selectivity in the oxidation reaction.
Article
Chemistry, Applied
M. I. Avila, M. M. Alonso-Doncel, L. Briones, G. Gomez-Pozuelo, J. M. Escola, D. P. Serrano, A. Peral, J. A. Botas
Summary: The catalytic fast pyrolysis of lignin using ion-exchanged zeolite catalysts showed significant improvements in bio-oil quality and the production of aromatic hydrocarbons and oxygenated compounds.
Article
Chemistry, Applied
Enrico Catizzone, Giorgia Ferrarelli, Paolo Bruno, Girolamo Giordano, Massimo Migliori
Summary: The acid-catalysed alcohol conversion reaction is a promising route for de-fossilization strategies. Research on pure alcohol conversion and simultaneous dehydration of mixed alcohols have shown different product compositions, with the type and distribution of acid sites affecting the reaction mechanism.
Article
Chemistry, Applied
Alireza Ranjbari, Juho Kim, Jihee Yu, Jiyun Kim, Mireu Park, Nayoung Kim, Kristof Demeestere, Philippe M. Heynderickx
Summary: This study investigated a novel kinetic model for the adsorption and photocatalytic degradation of methyl orange using commercial ZnO and reduced ZnO photocatalysts. The results provided new insights into the interaction of catalysts with molecules of different charges and compared with a previous study on methylene blue. The presence of oxygen vacancies in ZnO and their effects on adsorption and photocatalytic degradation were analyzed, and the photocatalytic degradation rate of reduced ZnO was found to increase significantly.
