Article
Environmental Sciences
Aleksandr Pastukhov, Christian Knoblauch, Christian Beer, Irina Ryzhova, Dmitry Kaverin
Summary: Permafrost degradation due to climate warming in northeastern European Russia threatens soil organic carbon stocks. Through experiments, it was found that the CO2 oxidation respiration rate is higher than the anaerobic respiration rate, and the predicted CO2 production in the next 80 years will be much lower than estimated.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Chemical
Ying Wang, Bin Li, Yong-Shan Xiao, Zhong-Wen Liu
Summary: The complex-decomposition method was used to regulate the chemical and structural properties of NiO-MgO catalysts. The Ni0.1Mg0.9O catalyst prepared using glycine as the complexing agent and calcined at 800 degrees C exhibited the best catalytic performance.
Article
Chemistry, Organic
Yulin Sun, Ke Gao
Summary: An inexpensive and efficient method for the synthesis of various functionalized benzimidazoles, benzoxazole, and benzothiazole through a CO2-mediated reductive cyclization reaction in the presence of triethoxysilane is described. Mechanistic studies reveal that formic acid acts as a cocatalyst to promote the cyclization reaction.
JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Environmental Sciences
Xiaoxia Bai, Qiang Xu, Hong Li, Cheng Cheng, Qiang He
Summary: This study reveals that damming of rivers alters the spatial distribution of carbon in sediments, leading to higher CH4 and CO2 concentrations upstream compared to downstream. During reservoir impounding periods, CH4 diffusive flux is higher upstream than downstream, while CH4 emissions are predominantly by ebullition, with significantly higher flux downstream during discharging periods. The increase in TOC in downstream sediment is attributed to riparian zone soil erosion caused by water level fluctuations.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Chemistry, Multidisciplinary
Ji Su Yun, Ji Hong Kim, Seok Chang Kang, Ji Sun Im
Summary: The thermocatalytic decomposition of methane is a promising method for hydrogen production. In this study, the behavior of methane decomposition and deactivated catalysts were analyzed, and it was found that the activity of the activated carbon catalyst is mainly affected by the specific surface area and defect sites.
Article
Energy & Fuels
Xiao-Yan Deng, Ying Yang, Dong-Liang Zhong, Xi-Yue Li, Bin-Bin Ge, Jin Yan
Summary: This study investigates the morphology and kinetics of CO2 hydrate formation in the presence of sodium dodecyl sulfate (SDS). It was found that the growth of CO2 hydrate above the gas-liquid interface became stronger with higher SDS concentration, indicating an enhanced promoting effect of SDS on CO2 hydrate formation. The highest efficiency for CO2 hydrate formation was achieved at 1500 and 3000 ppm of SDS, showing potential for improving hydrate-based CO2 capture technology in the future.
Article
Chemistry, Multidisciplinary
Karma Zuraiqi, Ali Zavabeti, Jonathan Clarke-Hannaford, Billy James Murdoch, Kalpit Shah, Michelle J. S. Spencer, Chris F. McConville, Torben Daeneke, Ken Chiang
Summary: This study reports a method for the direct conversion of CO2 to solid carbon utilizing EGaIn liquid metal alloy. The method allows for low-temperature reduction of CO2, producing highly selective solid carbon. The generated carbon naturally accumulates on the top of the alloy, making it easy to collect.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Thermodynamics
Maria S. Sergeeva, Anton N. Petukhov, Dmitry N. Shablykin, Nikita A. Mokhnachev, Ilya V. Vorotyntsev, Vladimir M. Vorotyntsev
Summary: This study experimentally determined the gas hydrate dissociation pressures of the CH4-CO2 gas mixture in THF aqueous solution, and found a significant pressure decrease when THF was added within the considered temperature range.
FLUID PHASE EQUILIBRIA
(2021)
Article
Energy & Fuels
Junwen Bai, Jintong Gu, Dongjun Wang, Liyan Shang, Zhenbo Lv, Jiaqi Zhai
Summary: This study examines the kinetic effects of low concentrations of ethylene glycol (EG) and sodium chloride (NaCl) on methane hydrate production in sodium dodecyl sulfate (SDS) solution. The results show that both NaCl and EG have inhibitory effects on hydrate reaction in SDS solution, with the inhibitory effects increasing with concentration. Understanding the formation characteristics of hydrates is useful for industrial optimization and predicting additive concentrations in pipelines.
Article
Chemistry, Organic
Qiongyao Chen, Xingsi Kang, Xuehua Zhang, Yanwei Cao, Lin He
Summary: This study reveals the role of ionic liquids (ILs) in promoting the dissociation of Shvo's catalyst and enhancing the rate of carbon monoxide (CO) production. These CO molecules are then used in the tandem hydroformylation-reduction of alkenes, resulting in the production of valuable alcohols. Additionally, the absence of ILs allows for the formation of formamides through N-formylation of primary or secondary amines.
JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Chaojun Cui, Ye Wang, Xiangze Du, Li Li, Mouxiao Song, Wenqing Zeng, Guiying Li, Changwei Hu
Summary: The study demonstrates the significant influence of nickel loading on the performance of CO2 reforming of methane catalysts. Lower nickel loading can lead to increased CH4 conversion stability without coke formation, while higher nickel loading results in decreased activity and carbon accumulation.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Energy & Fuels
Qian Zhang, Haiyuan Yao, Zhenhe Jian, Min Li, Zhuang Wu, Lunxiang Zhang, Shi Shen, Lei Yang, Jiafei Zhao, Yongchen Song
Summary: Understanding the gas-water flow mechanisms is essential for the exploitation of natural gas hydrates (NGHs) as a transition energy. This study used a 2.5D microfluidic chip device to visualize the real-time dissociation process of methane hydrate and methane-tetrahydrofuran hydrate, and performed a morphological analysis. The distribution of dissociated methane bubbles was quantitatively analyzed to describe the hydrate dissociation behavior and the formation of gas-water flow channels. The study found that the initial distribution and denseness of formed hydrates are critical for the formation of gas-water flow channels, and the dissociation behavior differs between different systems.
Article
Agronomy
Hector Aaron Lee-Rangel, Anayeli Vazquez Valladolid, Heriberto Mendez-Cortes, Juan Carlos Garcia-Lopez, Gregorio Alvarez-Fuentes, Jose Alejandro Roque-Jimenez, Mario Alejandro Mejia-Delgadillo, Luis Octavio Negrete-Sanchez, Oswaldo Cifuentes-Lopez, Hugo Magdaleno Ramirez-Tobias
Summary: The study found that adding copra meal in lamb diet could decrease gas production volume and greenhouse gas emissions without affecting animal performance.
Article
Engineering, Chemical
Yuxuan Xu, Yuan Gao, Dengke Xi, Liguang Dou, Cheng Zhang, Baowang Lu, Tao Shao
Summary: This study utilizes a compact and low-cost commercial power supply to sustain spark discharge plasma-enabled CO2 dissociation, achieving efficient CO2 conversion. The effects of different electrode configurations on the conversion performance were investigated.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Lingting Ye, Zhibo Shang, Kui Xie
Summary: This study demonstrates a novel method for the selective conversion of methane to ethylene in a solid oxide electrolyser with high selectivity and stability, showing promising potential applications in the chemical field.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Engineering, Environmental
Lilla Fijolek, Anna Malaika, Wojciech Biernacki, Jacek Nawrocki
OZONE-SCIENCE & ENGINEERING
(2019)
Article
Chemistry, Applied
Joanna Goscianska, Anna Malaika
Article
Chemistry, Applied
Paulina Rechnia-Goracy, Anna Malaika, Mieczyslaw Kozlowski
Article
Materials Science, Multidisciplinary
Beata Krzyzynska, Anna Malaika, Karolina Ptaszynska, Agnieszka Tolinska, Piotr Kirszensztejn, Mieczyslaw Kozlowski
DIAMOND AND RELATED MATERIALS
(2020)
Article
Chemistry, Physical
A. Malaika, K. Morawa Eblagon, O. S. G. P. Soares, M. F. R. Pereira, J. L. Figueiredo
APPLIED SURFACE SCIENCE
(2020)
Article
Energy & Fuels
Anna Malaika, Karolina Ptaszynska, Mieczyslaw Kozlowski
Summary: Sulfonated bio-carbon samples were prepared using two different methods and showed excellent catalytic performance in the esterification reaction of glycerol with acetic acid, achieving high conversion and satisfactory selectivity. The prepared carbon materials retained their activity after multiple cycles, and there was a correlation between catalyst performance and the concentration of -SO3H groups.
Article
Chemistry, Physical
Justina Gaidukevic, Jurgis Barkauskas, Anna Malaika, Vitalija Jasulaitiene, Mieczyslaw Kozlowski
Summary: A series of N-doped graphene-based materials were prepared through thermal treatment of graphene oxide under ammonia flow or impregnation with melamine, resulting in efficient doping of TRGO with N functionalities. The NH3-treated carbons were more basic in nature compared to those treated with melamine, with the presence of quaternary nitrogen. The preferential formation of quaternary nitrogen was observed under more severe conditions of higher temperature and longer reaction time.
APPLIED SURFACE SCIENCE
(2021)
Article
Energy & Fuels
A. Malaika, K. Ptaszynska, K. Morawa Eblagon, M. F. R. Pereira, J. L. Figueiredo, M. Kozlowski
Summary: Carbon catalysts functionalized with -SO3H groups were found to effectively catalyze the transesterification reaction between glycerol and ethyl acetate, producing a mixture of acetins. The efficient production of valuable biofuel additives, namely diacetins and triacetins, was strongly dependent on the sulfonic group content on the catalyst surface.
Article
Multidisciplinary Sciences
Anna Malaika, Karolina Ptaszynska, Mieczyslaw Kozlowski
Summary: Ethylene was transformed into carbon products via a thermocatalytic process, which were further modified with concentrated sulfuric acid or 4-benzenediazonium sulfonate to produce acid-type catalysts. Samples were characterized and analyzed to confirm the better performance of diazonium salt-modified carbon fibers in the synthesis of high-value fuel bio-additives.
SCIENTIFIC REPORTS
(2021)
Article
Energy & Fuels
Anna Malaika, Karolina Ptaszy, Justina Gaidukevic, Mieczyslaw Kozlowski
Summary: Thermally reduced graphene oxide (TRGO) was functionalized using different modifying agents to obtain solid acid graphene-based catalysts. The catalyst modified with 4-benzenediazonium sulfonate (TRGO_BDS) exhibited excellent catalytic activity, attributed to a high content of surface SO3H groups.
Article
Electrochemistry
Justina Gaidukevic, Ruta Aukstakojyte, Mieczyslaw Kozlowski, Jurgis Barkauskas, Rasa Pauliukaite
Summary: This paper presents a simple and facile method for preparing N-doped reduced graphene oxide (N-rGO) as an electroactive electrode material for the detection of hydrogen peroxide and glucose. Two different N-rGO samples were obtained by thermal modification of reduced graphene oxide at different temperatures. The N-rGO_950 sample showed higher electrochemical activity and sensitivity compared to the N-rGO_850 sample due to its higher amount of nitrogen species and surface area. The sensor based on N-rGO_950 exhibited fast response time, wide linear range, low limit of detection, and superior sensitivity for the detection of H2O2 and glucose.
ELECTROCHIMICA ACTA
(2023)
Article
Biochemistry & Molecular Biology
Karolina Ptaszynska, Anna Malaika, Klaudia Kozigrodzka, Mieczyslaw Kozlowski
Summary: The results show that carbon-fiber-supported metal oxide catalysts can effectively and selectively synthesize glycerol carbonate from urea and glycerol under ambient pressure. The CFox-supported ZnO and MgO systems exhibit the best catalytic performance.
Article
Energy & Fuels
Anna Malaika, Martyna Heinrich, Joanna Goscianska, Mieczyslaw Kozlowski