Article
Energy & Fuels
Hui Li, Yongbo Wang, Zhihao Han, Tianyu Wang, Yunpu Wang, Chenhui Liu, Min Guo, Guoning Li, Wanpeng Lu, Mingzhi Yu, Xiaoling Ma
Summary: This study creatively designs a highly stable calcium oxide catalyst with strong microwave absorbing capacity, which is anchored in nanosheet carbon. The prepared catalyst showed high catalytic activity and stability for biodiesel production.
Article
Chemistry, Applied
Zhiguo Bian, Yingjie Li, Chunxiao Zhang, Jianli Zhao, Zeyan Wang, Wenqiang Liu
Summary: The hollow nanostructured CaO material fabricated by hydrothermal carbonization method shows promising performance in coupled Ca-looping for CO2 capture and CaO/Ca(OH)(2) heat storage, with significantly higher CO2 capture capacity and heat storage capacity compared to traditional limestone.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Energy & Fuels
Zhiguo Bian, Yingjie Li, Yu Ren, Yi Fang, Jianli Zhao
Summary: In this study, a novel CaO/Ca(OH)2/CaCO3 coupling heat storage process using limestone under fluidization was proposed. Two coupling modes were compared, and the optimal coupling mode achieved higher exothermic performance of CaO particles. By introducing CaO/CaCO3 cycles and CaO/Ca(OH)2 cycles, the volumetric energy density and carbonation conversion of CaO particles can be improved.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Biotechnology & Applied Microbiology
Yan Liu, Biju Theruvil Sayed, R. Sivaraman, Saad M. Alshahrani, Kumar Venkatesan, Kamal Y. Thajudeen, Mohammed Al-Bahrani, Salema K. Hadrawi, Ghulam Yasin
Summary: In recent years, efforts have been made to develop environmentally friendly fuels to combat the negative effects of fossil fuels on the ecosystem. Alternative biodiesel transport fuels (ABTF) have shown promising potential due to their non-toxicity and biodegradability. This paper utilizes neural network-based approaches to predict the performance of ABTF based on input features such as reaction duration, catalyst amount, and methanol/oil ratio. After tuning and evaluating different neural network models, the boosted multilayer perceptron is identified as the most accurate model with an optimal output value of 98.99 when the input vector is (x1 = 158, x2 = 1.25, x3 = 33.75).
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2023)
Article
Engineering, Environmental
Ana Paula Soares Dias, Marta Ramos
Summary: Lime based catalysts are active in oil alcoholysis and biodiesel production, but their sensitivity to moisture and CO2 may hinder industrial applications. After 180 days of storage, it was found that the biodiesel yield of lime catalysts decreased with time, with a peak yield reached on day 30. Additionally, the stability of CaO material during storage and handling was demonstrated by successful reactivation through annealing at 470 degrees C.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Optics
Lu Qi, Evan C. Reed, Kenneth R. Brown
Summary: Control of the external degree of freedom is crucial for the applications of trapped molecular ions in spectroscopy, precision measurements, and quantum information technology. In this study, we demonstrate near ground-state cooling of axial motional modes of a calcium mono-oxide ion through sympathetic sideband cooling with a cotrapped calcium ion. We also observe that the phonon state of the axial out-of-phase mode of the ion chain remains unchanged while the mode frequency is adiabatically ramped up and/or down, which is essential for investigating the proposed molecular dipole-phonon interaction.
Article
Chemistry, Physical
Jiadi Liu, Minghuan Liu, Shaoyun Chen, Bingqing Wang, Jin Chen, Da-Peng Yang, Shangzhou Zhang, Wenxiao Du
Summary: The use of waste eggshells to develop CaO/Au nanocatalyst for transesterification reaction between soybean oil and methanol showed superior catalytic activity and good recyclability.
GREEN ENERGY & ENVIRONMENT
(2022)
Article
Energy & Fuels
MubarakAli Davoodbasha, Arivalagan Pugazhendhi, Jung-Wan Kim, Sang-Yul Lee, Thajuddin Nooruddin
Summary: The study achieved successful conversion of algal oil into biodiesel using CaO nanocatalyst, and optimized the process by adjusting reaction parameters and catalyst concentration.
Review
Energy & Fuels
Kai Wang, Ting Yan, R. K. Li, W. G. Pan
Summary: This paper summarizes the recent research on thermochemical energy storage materials, focusing on the CaO/Ca(OH)2 system. The research includes the physical and chemical properties of the materials, as well as the structure changes, thermodynamic properties, and reaction kinetics during the reaction process. The paper also addresses the issues with the material and suggests the use of composite materials to overcome these limitations. Finally, the performance of this material in different types of reaction beds is summarized.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Chemistry, Physical
Rahul R. Bhosale
Summary: This study conducted a thermodynamic evaluation of a solar assisted CaO-based water splitting cycle using HSC Chemistry 9.9 software. The results showed that the thermal reduction efficiency increased with the rise in temperature, leading to higher solar energy requirements. Additionally, the energy conversion efficiency of the cycle was further improved through the use of heat recuperation techniques.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Energy & Fuels
Fekadu Ashine, Zebene Kiflie, Sundramurthy Venkatesa Prabhu, Belachew Zegale Tizazu, Venkatramanan Varadharajan, Manivasagan Rajasimman, Sang-Woo Joo, Yasser Vasseghian, Mani Jayakumar
Summary: The present study optimized the process of biodiesel production from Argemone mexicana oil using calcium oxide as a catalyst derived from chicken eggshells. The catalyst was characterized and the parameters were optimized through response surface methodology, resulting in a high yield of biodiesel. Non-statistical techniques were used to analyze the optimal values, and the obtained biodiesel was characterized using spectroscopic techniques.
Article
Materials Science, Multidisciplinary
D. Murguia-Ortiz, I. Cordova, M. E. Manriquez, E. Ortiz-Islas, R. Cabrera-Sierra, J. L. Contreras, B. Alcantar-Vazquez, M. Trejo-Rubio, J. T. Vazquez-Rodriguez, L. V. Castro
Summary: Mexican dolomites doped with sodium nitrate were calcined to generate mixed metal oxides for catalytic transesterification of canola oil. Among all catalysts, Na-CaO/MgO exhibited the highest conversion rate of 95.4% and the optimal theoretical conversion rate of 97.46% was obtained through nonlinear programming.
Article
Engineering, Environmental
Zhiguo Bian, Yingjie Li, Chunxiao Zhang, Jianli Zhao, Tao Wang, Wentao Lei
Summary: The study experimentally investigated the effects of key factors on the heat release performance of CaO in a fluidized bed reactor, indicating that CaO exhibits excellent cyclic stability in a fluidized state, the increase in cycle number leads to rapid particle expansion, and different carrier gas conditions influence the hydration conversion rate of CaO.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Engineering, Chemical
Chunxiao Zhang, Yingjie Li, Zhiguo Bian, Wan Zhang, Zeyan Wang
Summary: The modified carbide slag with by-product of biodiesel shows superior CO2 capture and heat storage capabilities in the coupled calcium looping and CaO/Ca(OH)(2) thermochemical heat storage process. Introducing CO2 capture cycles and heat storage cycles can enhance the CO2 capture reactivity and heat storage density of the modified carbide slag.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2021)
Article
Biochemistry & Molecular Biology
Ruzhan Bai, Na Li, Quansheng Liu, Shenna Chen, Qi Liu, Xing Zhou
Summary: Ca-looping is an effective method for capturing CO2 from coal-fired power plants, but there are still issues related to the influence of steam on the process that require further investigation. This study used a self-made thermogravimetric analyzer to measure the weight change of samples under constant temperature conditions. The effects of different parameters, such as the addition of water vapor and the reaction temperatures, on the Ca-looping process were studied in detail. The results showed that steam has a positive overall effect on CO2 capture.
Article
Chemistry, Applied
Marta Paniagua, Gabriel Morales, Juan A. Melero, Jose Iglesias, Clara Lopez-Aguado, Nora Vidal, Rafael Mariscal, Manuel Lopez-Granados, Irene Martinez-Salazar
Summary: By combining Zr and Al as active sites within a BEA zeolite structure, the distribution of products can be influenced and the yields of GVL and isopropyl lactate can be improved. Adjusting the Al/Zr ratio has a strong impact on the catalyst's performance, leading to higher GVL yields with an increase in Zr content and low content of Al acid sites.
Article
Chemistry, Physical
Fnu Gorky, Anthony Best, Jacek Jasinski, Bryan J. Allen, Ana C. Alba-Rubio, Maria L. Carreon
Summary: Ammonia synthesis via atmospheric dielectric barrier discharge plasma over nickel nanoparticles supported on silica showed a significant size effect, with the smallest nanoparticle size sample having at least 2 times higher synthesis rate than the larger nanoparticle size sample and nickel bulk. This study observed the size effect in plasma catalysis for the first time and determined the beneficial gas composition for hydrogen sink metal such as nickel under atmospheric plasma conditions.
JOURNAL OF CATALYSIS
(2021)
Review
Chemistry, Analytical
Surachet Duanghathaipornsuk, Eveline J. Farrell, Ana C. Alba-Rubio, Piotr Zelenay, Dong-Shik Kim
Summary: Reactive oxygen species (ROS) are widely distributed and related to various diseases, with common ROS in human health being superoxide, hydrogen peroxide, and hydroxyl radicals. Fluorescence and electrochemical methods are effective techniques recently developed for ROS detection.
Article
Polymer Science
Hossein Abedsoltan, Ibeh S. Omodolor, Ana C. Alba-Rubio, Maria R. Coleman
Summary: Poly (4-styrenesulfonic acid) (PSSA) was utilized as a recoverable acid catalyst for hydrolysis of polyethylene terephthalate (PET) to terephthalic acid (TPA) and ethylene glycol (EG). The PSSA system exhibited faster hydrolysis kinetics than H2SO4 with better surface wetting of PET and higher localized concentration of protons. Reutilization and titration results indicated that PSSA maintained activity after five reaction cycles.
Article
Chemistry, Multidisciplinary
Beatriz Garcia, Ana Orozco-Saumell, Manuel Lopez Granados, Jovita Moreno, Jose Iglesias
Summary: The catalytic transfer hydrogenation of glucose to sorbitol using biomass-derived alcohols and diols as hydrogen donors was studied. Sacrificial diols showed superior performance compared to short-chain alcohols, with terminal diols providing high selectivity in the conversion. Molybdenum promotion enhanced catalytic activity of sponge nickel catalysts, allowing high selectivity in continuous-flow operation for at least 550 hours.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Chemistry, Physical
M. Munoz-Olasagasti, I Martinez-Salazar, M. Lopez Granados, C. Lopez-Aguado, J. Iglesias, G. Morales, R. Mariscal
Summary: This study investigated the effects of the nature and strength of surface acid sites on the properties of the catalyst used for the conversion of levulinic acid to valeric biofuels. The presence of strong Bronsted acid sites was critical for achieving high ethyl valerate yields, while three types of Lewis acid sites were also identified. Reutilization tests of the catalyst showed mild deactivation, and simple calcination treatment was adequate for the recovery of surface acidity but affected the reducibility of Pd species.
SUSTAINABLE ENERGY & FUELS
(2022)
Article
Energy & Fuels
Lu Yu, Kendhl Seabright, Ishan Bajaj, David J. Keffer, David M. Alonso, Chien-Te Hsieh, Mi Li, Hao Chen, Sheng Dai, Yasser Ashraf Gandomi, Christos T. Maravelias, David P. Harper
Summary: In this study, lignins extracted from yellow pine and switchgrass were converted into porous activated carbon electrodes for high energy-density supercapacitors. The research explores the impact of lignin composition on the structure and electrochemical properties of activated carbons. The resulting electrodes exhibited excellent stability and efficiency.
FRONTIERS IN ENERGY RESEARCH
(2022)
Article
Green & Sustainable Science & Technology
Jorge Blanco, Maria Linares, Manuel Lopez Granados, Ion Agirre, Inaki Gandarias, Pedro Luis Arias, Jose Iglesias, Jovita Moreno, Alicia Garcia
Summary: This study compares the production of maleic anhydride from different feedstock using life cycle analysis and exergy analysis. The results show that the gas phase oxidation of furfural is competitive with petrochemical technologies, while the aqueous phase process is not viable due to energy and environmental concerns. The environmental footprint of the starting raw material is the major drawback for the new furfural-to-maleic anhydride production processes. The use of environmentally friendly furfural production technologies at the commercial scale can improve the environmental performance of gas phase maleic anhydride production.
ADVANCED SUSTAINABLE SYSTEMS
(2022)
Article
Chemistry, Physical
Ibeh S. S. Omodolor, Subhash Kalidindi, Sarah A. A. Walz, Maria R. R. Coleman, Ravikumar Gogar, Sridhar Viamajala, Manuel Lopez Granados, Ana C. C. Alba-Rubio
Summary: This article presents a novel polystyrene sulfonic acid-based catalyst for the efficient synthesis of HMF from glucose. The catalyst has both Bronsted and Lewis acid sites, enabling both glucose isomerization and fructose dehydration reactions. By adjusting the Bronsted to Lewis acid ratio, a HMF yield of 55mol% was achieved, and the catalyst could be recycled multiple times.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Ana Orozco-Saumell, Rafael Mariscal, Francisco Vila, Manuel Lopez Granados, David Martin Alonso
Summary: The catalytic transformation of furfural to cyclopentanone was studied using different solvents. The presence of tert-butanol inhibits key steps in the overall conversion and requires higher H-2 pressure and temperature. The obtained productivities per gram of catalyst and mols of Cu basis are substantially higher than other copper-based catalysts.
Article
Chemistry, Physical
Ana Orozco-Saumell, R. Mariscal, J. Iglesias, P. Maireles-Torres, M. Lopez Granados
Summary: Long-term studies on the activity of the formic acid-mediated hydrogenation of MAc to SAc revealed that deactivation occurs when the catalyst is subjected to a high WHSV of MAc. However, the loss of activity can be compensated for by adjusting the reaction conditions.
SUSTAINABLE ENERGY & FUELS
(2022)
Article
Chemistry, Physical
M. Munoz-Olasagasti, M. Lopez Granados, C. P. Jimenez-Gomez, J. A. Cecilia, P. Maireles-Torres, J. A. Dumesic, R. Mariscal
Summary: In the gas phase direct transformation of levulinic acid into ethyl valerate, the presence of aluminum is necessary for the selective transformation to gamma-valerolactone. The catalyst with the highest Al content, CoSBA-2.5Al, showed the best performance with a yield of up to 70% due to the stabilization of Co2+ Lewis acid sites (LAS) by incorporation of aluminum.
CATALYSIS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Surachet Duanghathaipornsuk, Dong-Shik Kim, Tamara L. Phares, Cheng-Han Li, Joerg R. Jinschek, Ana C. Alba-Rubio
Summary: Excessive hydroxyl radicals (OH) in the human body can lead to oxidative stress-related diseases, with a supersensitive nanosensor integrated with an electrochemical method being able to measure the concentration of OH accurately. This method has shown high selectivity and the ability to differentiate OH from other reactive oxygen species.
Article
Chemistry, Physical
Yifan Sun, Ye Lv, Wei Li, Jinli Zhang, Yan Fu
Summary: In this study, PtRu electrocatalysts were fabricated on carbon paper via cyclic electrodeposition for the electrocatalytic hydrogenation (ECH) of phenol. The Pt3Ru3 catalyst exhibited excellent activity and stability for the conversion of phenol to cyclohexanol at ambient temperature and various current densities. The in situ Raman spectroscopy and kinetic study revealed the hydrogenation mechanism of phenol over Pt3Ru3 in acidic electrolyte, providing an effective electrochemical strategy for the facile construction of durable electrode materials and efficient phenol hydrogenation.
JOURNAL OF CATALYSIS
(2024)
Article
Chemistry, Physical
Amir Shahzad, Khezina Rafiq, Muhammad Zeeshan Abid, Naseem Ahmad Khan, Syed Shoaib Ahmad Shah, Raed H. Althomali, Abdul Rauf, Ejaz Hussain
Summary: Photocatalytic hydrogen production through water splitting is an effective method for meeting future energy demands. In this study, researchers synthesized a 1 % Ag2S/Cu2S co-doped CdZnS catalyst and found that it can produce hydrogen at a higher rate. The co-doping of Ag2S and Cu2S in the CdZnS catalyst showed a synergistic effect, with Ag2S promoting oxidation reactions and Cu2S promoting reduction reactions.
JOURNAL OF CATALYSIS
(2024)