Article
Engineering, Chemical
Annika Linke, Heike Teichmann, Reinhard Kohlus
Summary: The study proposed a simulation method coupling diffusion-based simulation and reaction kinetics to investigate the effect of physical powder properties on oxygen distribution and oxidation of microencapsulated oil. The simulated data were in good agreement with experimental results, indicating the reliability of the model in predicting hydroperoxide formation in encapsulated oils.
JOURNAL OF FOOD ENGINEERING
(2021)
Article
Chemistry, Applied
Jilu Feng, Karin Schroen, Vincenzo Fogliano, Claire Berton-Carabin
Summary: This study explores the use of natural antioxidants to mitigate lipid oxidation in food emulsions high in omega-3 polyunsaturated fatty acids. Soy protein isolate and dextran are found to have potential in reducing oxidation, while excess proteins can enhance antioxidant effects. Adjusting protein localization and continuous phase composition can improve oxidative stability without the need for synthetic antioxidants.
FOOD HYDROCOLLOIDS
(2021)
Article
Chemistry, Multidisciplinary
Ping Xu, Meihui Zhao, Xue Fu, Chen Zhao
Summary: This paper investigates the effect of Cl- on the corrosion behavior of carbon steel in an iron bacteria (IB) environment. The results show that a higher concentration of Cl- accelerates the anodic reaction and corrosion, but in the later stage of corrosion, a high concentration of Cl- inhibits the anodic reaction, thus suppressing corrosion.
Article
Chemistry, Physical
Marjetka Conradi, Bojan Podgornik, Maja Remskar, Damjan Klobcar, Aleksandra Kocijan
Summary: The functionalisation of AISI 316L surfaces using nanosecond Nd:YAG laser texturing was performed to modify the surface morphology. A tribological analysis was conducted under lubrication with different oils, with and without the addition of MoS2 nanotubes. The crosshatch pattern exhibited lower friction and better oil retention capacity, making it a promising choice for improving tribological performance in environmentally friendly applications.
Article
Energy & Fuels
Alexandra Saitova, Sergey Strokin, Jorge Ancheyta
Summary: The study compared the pyrolysis and oxidation processes of asphaltenes extracted from Yarega heavy crude oil and its residues in both nitrogen and air atmosphere. Different stages of pyrolysis and oxidation were identified, with varying characteristics observed for the different samples. Kinetic parameters were estimated and the findings can potentially contribute to the development of asphaltene processing methods in petroleum refineries.
Article
Agricultural Engineering
Mingyang Zan, Xue Wang, Aibibai Amuti, Zhanzhong Wang, Leping Dang
Summary: The study optimized the saponification reaction of PSO using Box-Behnken design and response surface methodology, achieving the highest yield and determining the kinetic parameters of the reaction. This work provides valuable insights for industrial production of PSO fatty acid products.
INDUSTRIAL CROPS AND PRODUCTS
(2021)
Article
Engineering, Mechanical
Leonardo I. Farfan-Cabrera, Ali Erdemir, Julio A. Cao-Romero-Gallegos, Istiaque Alam, Seunjoo Lee
Summary: This study investigates the effects of DC current discharges on the contact interfaces of AISI 52100 bearing steel. The results indicate that passing DC current increases the coefficient of friction and wear of dry sliding contacts, while it slightly reduces the coefficient of friction but significantly increases wear for lubricated contacts due to accelerated oxidation by electrification.
Article
Engineering, Mechanical
Haizum Aimi Zaharin, Mariyam Jameelah Ghazali, Mohammad Khalid, Thachnatharen Nagarajan, Wong Weng Pin, Farah Ezzah, Ong Gerard, Rashmi Walvekar, Abdul Khaliq Rasheed
Summary: In today's fast, globalised world, lubrication is essential for enhancing engine efficiency in the marine sector. Ti3C2Tx MXene nanoparticles can improve the lubrication performance of outboard engines and increase engine lifespan. The research shows that a 0.01 wt.% concentration of Ti3C2Tx MXene nanolubricant in outboard engine oil reduces friction coefficient, wear scar diameter, and improves oxidation induction time and thermal conductivity.
Article
Metallurgy & Metallurgical Engineering
Xing-Qiang Qian, Bin Sun, Dong-Shan Tang, Jian Chen, Lei Cheng, Zhi-Feng Li
Summary: The oxidation behavior of SUS430 ferritic stainless steel was studied under different humidities. It was found that increasing humidity resulted in a shorter induction period and earlier breakaway oxidation. The surface structure of the oxide scale was layered, with an outer layer of iron oxide and an inner layer mainly composed of Fe-Cr spinel phase. Cracks accelerated the diffusion of ions and electrons, as well as the erosion of the substrate.
STEEL RESEARCH INTERNATIONAL
(2023)
Article
Materials Science, Characterization & Testing
Irving Morgado-Gonzalez, Martin Ortiz-Dominguez, Mourad Keddam
Summary: In this study, boronization was performed on ASTM A1011 steel substrate to form iron boride layers. X-ray diffraction was used to confirm the presence of boride phase. Tribological studies were conducted to evaluate the adherence and coefficient of friction of the boride layer.
Article
Chemistry, Physical
Wen Zhong, Jiazhi Dong, Siqiang Chen, Zhe Tong
Summary: The addition of g-C3N4 and h-BN as lubricating additives can significantly improve the lubricating properties of the white oil, reducing the friction coefficient and wear rate. The large contact area between g-C3N4 and its sliding counterpart, and the strong adhesive force between h-BN and its sliding counterpart, enhance the film formation efficiency, leading to enhanced tribological properties under oil lubrication conditions.
Article
Engineering, Mechanical
Davide Massocchi, Steven Chatterton, Marco Lattuada, Thomas Reddyhoff, Daniele Dini, Paolo Pennacchi
Summary: This study evaluated the effect of different types of friction reducers (FRs) on the lubrication of PEEK-steel couplings and studied their mechanisms. The experimental results showed that the addition of FRs significantly reduced friction, and all FRs effectively reduced friction when PEEK was present. This demonstrates the promising performance of PEEK as a lubricating material and its potential for improving efficiency in sliding machine parts.
Article
Engineering, Environmental
Xiaoqi Shi, Saier Liu, Chuansong Duanmu, Minjing Shang, Min Qiu, Chong Shen, Yong Yang, Yuanhai Su
Summary: In this study, phenol was successfully synthesized through photooxidation, reaching a high yield of 94% and selectivity over 99% under optimized conditions. The photomicroreactor with blue LEDs as an eco-friendly light source demonstrated significant advantages, while a reaction kinetic model was established to further understand the photooxidation mechanism.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Applied
Siyu Zhang, Casimir C. Akoh
Summary: This research overcame the oxidative instability of o3-3 fatty acids (FAs) by combining processing techniques with antioxidant addition. The resulting microencapsulated oleogel with 1-o-galloylglycerol (GG) as antioxidant showed similar physicochemical properties to store-bought yogurt using saturated fat source. These findings could pave the way for incorporating o3-3 FAs into a variety of products in the future.
Article
Engineering, Chemical
Wei Zhan, Junnan Wang, Chengxiang He, Bin Jiang, Chunying Zhu, Youguang Ma, Taotao Fu
Summary: This study proposes a method of oxidizing glyoxal with nitric acid through a continuous flow microreactor to solve the problems of long operation periods, low selectivity, and low safety in traditional batch reactors, with high selectivity. The method utilizes the excellent performance of mass and heat transfer in the microreactor to improve reaction efficiency, selectivity, and safety. The effects of mixing performance, reactant molar ratio, temperature, residence time, and nitric acid mass fraction on the oxidation of glyoxal are investigated, and the optimum reaction conditions are determined.
CHEMICAL ENGINEERING SCIENCE
(2023)