Article
Chemistry, Physical
Maryam Fayazi, Masoud Ghanei-Motlagh
Summary: The PET-AC/Cu(II)-A beads prepared by cross-linking technology showed high adsorption capacity, reusability, and potential as a desulfurization adsorbent for fuels.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Energy & Fuels
Nilesh Mohan Khalse, Mahuya De
Summary: This study investigated the effect of nitrogen doping on the adsorptive removal of sulfur compounds from model fuel. Nitrogen doping improved the surface area and pore volume of templated carbon, thereby enhancing the adsorption capacity of sulfur compounds. The adsorption-regeneration cycles showed that the removal efficiency was only lowered by 4-10% after five cycles.
Article
Green & Sustainable Science & Technology
Liberty L. Mguni, Yali Yao, Jianwei Ren, Xinying Liu, Diane Hildebrandt
Summary: This study synthesized a group of Ni-doped MOF absorbents using modulated synthesis method with formic acid modulator, which significantly increased the crystallinity and crystallite size of Ni-BDC materials. The modulated synthesis was found to enhance the overall adsorptive activity of Ni-BDC for model fuels, leading to almost twofold increase in activity and higher adsorption capacity for thiophene compared to dibenzothiophene and 4,6-dimethyl-dibenzothiophene.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Chemistry, Analytical
Weiping Ma, Ronglin Xiao, Xiaoxian Wang, Xiaoli Lv, Wenfa Zhang, Wenjing Wang, Yingping Li, Mengfan Li, Luyao Hou, Yang Gong, Yun Zhang, Cheng-Meng Chen
Summary: Chemical co-activation can effectively modify the surface chemistry and pore structure of carbon electrode materials, leading to improved capacitive behaviors. The study demonstrates the successful synthesis of ultrapure anthracite-derived porous carbons with small mesopores, which exhibit low internal resistance, high specific capacity, superior rate capability, and excellent cycling stability.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Musa O. Azeez, Abdulkadir Tanimu, Khalid Alhooshani, Saheed A. Ganiyu
Summary: This study reports the synthesis of mesoporous metal-modified nitrogen doped activated carbon (AC-N-Mo) from date seeds and its application in the selective adsorptive desulfurization of dibenzothiophene (DBT). The AC-N-Mo shows higher adsorption capacity for DBT and exhibits excellent selectivity. The enhanced adsorption performance is attributed to the synergistic effect of nitrogen heteroatom.
ARABIAN JOURNAL OF CHEMISTRY
(2022)
Review
Chemistry, Multidisciplinary
Musa O. Azeez, Saheed A. Ganiyu
Summary: Sulfur is the most abundant element in crude oil after carbon and hydrogen. The harmful effects of sulfur emissions from transportation fuels on the environment and human well-being are causing concern. In order to reduce these effects, regulatory agencies have set minimum allowable sulfur concentrations in transportation fuels. Adsorption desulfurization (ADS) process using activated carbon (AC) has gained attention due to its simplicity, effectiveness, and environmental friendliness. This review discusses the recent developments in ADS as a complementary process to traditional hydrodesulfurization (HDS) or as a standalone technique using AC.
ARABIAN JOURNAL OF CHEMISTRY
(2023)
Article
Energy & Fuels
Liping Mu, Jing Luo, Chao Wang, Jixing Liu, Yiru Zou, Xiaowei Li, Yan Huang, Peiwen Wu, Haiyan Ji, Wenshuai Zhu
Summary: The hybrid nanocomposite exhibits excellent desulfurization performance and impressive adsorption capacity for different types of sulfides, showing great potential for applications in various fields.
Article
Engineering, Chemical
Shivam Singh Tomar, Nishith Verma, K. D. P. Nigam
Summary: This study proposes an enhanced radial mixing approach in coiled flow inverter (CFI) as an alternative to packed bed adsorptive desulphurization (ADS). Cu-carbon nanofiber (Cu-CNF) was synthesized using Cu-tartrate as the precursor and applied in the ADS process of liquid fuels in CFI. Experimental results showed that Cu-CNF slurry effectively removed thio-phene from n-hexane, achieving a sulfur (S) loading of 103 mg/g at a thiophene concentration of 2000 ppmw-S and a flow rate of 120 cc/min using five CFI units connected in series. Recycling was introduced in CFI for the first time, and three CFI units connected in series with a recycle ratio of 2 achieved the same removal efficiency as five CFI units without recycling. The results indicate that CFI is an efficient technology with the potential to replace packed bed adsorbers.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Energy & Fuels
Guanrong Song, Carlos Romero, Tom Lowe, Greg Driscoll, Boyd Kreglow, Harold Schobert, Jonas Baltrusaitis, Zheng Yao
Summary: An anthracitic coal-derived activated porous carbon is proposed as a promising carbon electrode material for supercapacitor applications. In this study, a series of anthracite-based activated carbons (ABAC) were prepared via a multistage activation process and evaluated for their electrochemical performance. The specific capacitance of the ABAC electrode was found to be related to specific surface area, pore size distribution, wettability, and conductivity. The optimum ABAC electrode exhibited excellent electrochemical performance, achieving a specific capacitance of 288.52 F/g and 260.30 F/g in 1 M sulfuric acid and 6 M potassium hydroxide electrolytes, respectively. The presence of oxygen functional groups on the activated carbon surface greatly improved its specific capacitance due to increased wettability. The results also showed that the electrolyte type influenced the performance, with the acidic electrolyte being more suitable for pore diffusion. The concentrated potassium hydroxide electrolyte resulted in increased specific capacitance due to increased ion adsorption. Additionally, the specific capacitance of the ABAC sample remained at 95.4% of the initial value after 1000 galvanostatic charge-discharge tests at 0.5 A/g, demonstrating its superior stability compared to commercial carbon materials.
Article
Engineering, Environmental
Xinyu Ge, Zhilin Wu, Maela Manzoli, Barbara Bonelli, Stefano Mantegna, Werner Kunz, Giancarlo Cravotto
Summary: This study focused on the removal of antibiotics from contaminated water and milk using pristine and modified activated carbons from various biomass sources. Modified activated carbons showed significantly higher adsorption performance for antibiotics than pristine ones, reducing adsorbent consumption and treatment costs.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Environmental
Yan Yin, Yueyang Xu, Konglu Guo, Peng Zhang, Yongping Zeng
Summary: In this study, it was found that Cu+ cation plays a significant and highly effective role in adsorptive desulfurization in Cu+-modified UiO-66(Zr), leading to improved adsorption capacity for thiophene.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Energy & Fuels
Muhammad Yaseen, Sana Ullah, Waqas Ahmad, Sidra Subhan, Fazle Subhan
Summary: In this study, zinc and manganese loaded activated carbon derived from corn cobs were used for adsorptive desulfurization of model and real fuel oils. The results showed that Zn/AC and Mn/AC performed better in removing dibenzothiophene, following pseudo 2nd order kinetics and Freundlich adsorption isotherm model. The prepared adsorbents remained highly active for six repeated cycles with minimal decrease in desulfurization performance under the optimized reaction conditions.
Article
Chemistry, Physical
Jing Luo, Ming Yan, Haiyan Ji, Liping Mu, Yan Huang, Linhua Zhu, Yiru Zou, Chao Wang, Peiwen Wu, Yanhong Chao, Wenshuai Zhu
Summary: This study successfully synthesized Ce@C-BN materials through a direct pyrolysis strategy, which exhibited high specific surface area and excellent adsorption performance for desulfurization. The presence of Ce-MOFs not only provided active sites but also enhanced the interaction between Ce and BN.
APPLIED SURFACE SCIENCE
(2022)
Article
Environmental Sciences
Heba H. El-Maghrabi, Rasha S. Mohamed, Ahmed A. Younes
Summary: The study describes a novel method of incorporating sulfonic acid groups onto mesoporous silica surface and evaluates its desulfurization efficiency. The prepared adsorbent showed high adsorption capacity for DBT and the desulfurization process was found to be spontaneous and exothermic.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Raziyeh Ahmadi, Omid Arjmand, Neda Haj Mohammad Hossein Tehrani, Atiyye Ghorbani, Alimorad Rashidi, Mehdi D. Esrafili, Hadi Hamyali
Summary: In this study, amine impregnated activated carbon was synthesized and used as an effective adsorbent for gasoline vapor uptake. The physiochemical characterization of the synthesized sorbents showed high surface area and unique micro-meso pore structure, which significantly influenced the gasoline sorption capacity. The prepared sorbents exhibited high durability and maintained a high uptake capacity after multiple cycles.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2023)
Article
Computer Science, Interdisciplinary Applications
Rakesh Kumar, Vimal Kumar Pathak
Summary: The present study aims to develop an adaptive neuro-fuzzy inference system (ANFIS) model to find a relationship between loading parameters and bone remodelling rate. The results indicate that the ANFIS model outperformed other models in predicting the mineral apposition rate (MAR) at periosteal and endosteal surfaces. This study provides a way to accurately predict site-specific osteogenesis based on the loading parameters.
COMPUTER METHODS IN BIOMECHANICS AND BIOMEDICAL ENGINEERING
(2023)
Article
Engineering, Mechanical
Rakesh Kumar, Abhishek Kumar Tiwari, Dharmendra Tripathi, Ashutosh Mishra
Summary: Osteoporosis, bone-muscle disuse, and long-term exposure to space microgravity can lead to bone loss and fractures. This study investigates the role of electromagnetic fields in regulating fluid motion within bone tissue and suggests an optimal loading regimen with electromagnetic field to prevent and mitigate irreversible bone loss caused by microgravity and disuse.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Engineering, Biomedical
Sushil Kumar Saroj, Rakesh Kumar, Nagendra Pratap Singh
Summary: This study proposes a new method for the enhancement and segmentation of retinal vessels, which achieves better performance compared to existing methods by using the Multiscale switching morphological operator and a new matched filter based on the Wald probability distribution function.
COMPUTER METHODS IN BIOMECHANICS AND BIOMEDICAL ENGINEERING-IMAGING AND VISUALIZATION
(2023)
Article
Thermodynamics
Ashif Perwez, Rakesh Kumar, Abhishek Bhushan
Summary: This study investigated the thermal performance of inclined elliptical dimpled plates through experimental and numerical analysis. It was found that staggered and inline patterns of the dimples have different effects on flow patterns and heat transfer characteristics.
NUMERICAL HEAT TRANSFER PART A-APPLICATIONS
(2023)
Article
Thermodynamics
Sudharani Panda, Rakesh Kumar
Summary: The thermal and flow characteristics of a dimple imprinted absorber plate solar air-heater were investigated numerically in this study. The results showed that the dimpled surface demonstrated a significant improvement in heat transfer and friction characteristics compared to the smooth surface.
NUMERICAL HEAT TRANSFER PART A-APPLICATIONS
(2023)
Article
Radiology, Nuclear Medicine & Medical Imaging
Esha Baidya Kayal, Jayendra Tiru Alampally, Raju Sharma, Sameer Bakhshi, Amit Mehndiratta, Rakesh Kumar, S. H. Chandrashekhara, Manisha Jana, Ashu Seith Bhalla, Mehar Chand Sharma, Asit Ranjan Mridha, Sreenivas Vishnubhatla, Devasenathipathy Kandasamy
Summary: This study assessed the role of diffusion-weighted magnetic resonance imaging (MRI) in the early evaluation of chemotherapeutic response in Ewing sarcoma family of tumors (ESFT). The results suggest that baseline nADC and its change after the first cycle of chemotherapy can serve as reliable markers for early chemotherapeutic response in ESFT patients.
Article
Telecommunications
Sweta Singh, Rakesh Kumar
Summary: This paper introduces a method for optimizing energy efficiency and resource utilization in the field of cloud computing. By utilizing the proposed MAMFO algorithm and DT-ESAR method, workflow planning and VM consolidation can be effectively performed, improving the energy efficiency and time efficiency of the system. Experimental results show significant improvements compared to existing methods.
WIRELESS PERSONAL COMMUNICATIONS
(2023)
Article
Oncology
Suresh Mani, Rajeev Kumar, Aanchal Kakkar, Adarsh Barwad, Kondamudi Dheeraj, Prem Sagar, Rakesh Kumar
Summary: Dermatofibrosarcoma protuberans (DFSP) is a rare cutaneous sarcoma with low metastatic potential but high local recurrence rate. Surgical excision with adequate margins is the preferred treatment, with possible adjuvant radiotherapy or chemotherapy. This retrospective analysis of head and neck DFSP cases revealed that incomplete excision margins may increase the risk of recurrence.
INDIAN JOURNAL OF SURGICAL ONCOLOGY
(2023)
Article
Optics
Rakesh Ranjan Kumar, Lars Nielsen, Nicolas Volet, Martijn J. R. Heck
Summary: We present a study on the intra-cavity coherent combining of two DBR lasers on an InP platform, achieving a combining efficiency of 84%. The combined DBR lasers exhibit an on-chip power of 9.5 mW at an injection current of 42 mA in both gain sections simultaneously. This monolithic approach enables the operation of compact and high-power lasers in a single-mode regime with a side-mode suppression ratio of 38 dB, providing a promising direction for integrated photonic technologies.
Article
Chemistry, Multidisciplinary
Prerna Gupta, Rekha Garg Solanki, Pushpanjali Patel, K. M. Sujata, Rakesh Kumar, Abhay Pandit
Summary: Microorganisms can cause health issues, but semiconductor nanostructures have potential for antimicrobial properties. This study synthesized ZnSe nanostructures using a green coprecipitation method and annealed them at different temperatures. The samples were analyzed for structural, morphological, optical, and antibacterial properties. The results showed that the annealing process enhanced the photoluminescence and antimicrobial activities of ZnSe nanostructures, making them suitable for blue LEDs and lasers for medical applications. The as-synthesized and annealed ZnSe nanostructures were found to be effective against microbial growth, indicating their potential for developing new drugs against bacterial infections.
Article
Computer Science, Artificial Intelligence
Rakesh Kumar, Satish Kumar
Summary: This article discusses the distance and similarity measures as two interrelated information measures that can effectively quantify the deviation and similarity between pairs of objects. It proposes a novel similarity measure that overcomes the limitations of existing measures and analyzes its characteristics through numerical experiments. Furthermore, it develops an algorithm for pattern recognition and examines the efficiency of the suggested measure in clustering analysis and decision-making.
GRANULAR COMPUTING
(2023)
Review
Energy & Fuels
Divyam Jha, Pranjal Maheshwari, Yugank Singh, Mohd Belal Haider, Rakesh Kumar, M. S. Balathanigaimani
Summary: Extractive desulfurization has been found to be one of the most effective methods for desulfurizing liquid fuels. The factors that affect desulfurization include temperature, oil/ionic liquid (IL)/deep eutectic solvent (DES) mass ratio, extraction time, initial sulfur content, mutual solubilities, multiple cycles, and regeneration of used solvents in the extractive desulfurization (EDS) process. The results of this study are significant for solvent selection and setting criteria for the EDS process.
JOURNAL OF THE ENERGY INSTITUTE
(2023)
Article
Surgery
Avinash Shekhar Jaiswal, Rajeev Kumar, Rakesh Kumar, Arvind Kumar Kairo, Sarath Raveendran, Prem Sagar
Summary: This study retrospectively investigated the clinico-demographical profile and outcomes of cochlear implantation in adult patients with post-lingual hearing loss in a tertiary care hospital in north India. The study included 21 patients, with a mean age of 38.6 years and a male-to-female ratio of 15:6. The major cause of deafness was infections, and the complication rate was 4.8%. The mean postoperative speech intelligibility score was 74%, and there were no device malfunctions in the average follow-up of 44 months. Cochlear implantation is a safe and effective surgical intervention for post-lingually deafened adults, with infections being the major cause of deafness.
INDIAN JOURNAL OF OTOLARYNGOLOGY AND HEAD & NECK SURGERY
(2023)
Article
Computer Science, Theory & Methods
Rakesh Kumar, Meenu Gupta, Jaismeen, Shreya Dhanta, Nishant Kumar Pathak, Yukti Vivek, Ayush Sharma, Deepak, Gaurav Ramola, Sudha Velusamy
Summary: Automatic bokeh is an important photography effect on smartphones, and this study proposes a deep learning model to recommend high-quality bokeh effects with a high accuracy rate.
ACTA UNIVERSITATIS SAPIENTIAE INFORMATICA
(2022)
Article
Surgery
Kapil Sikka, Rijendra Yogal, Tanvi Chaudhary, Mao Bhartiya, Hitesh Verma, Rakesh Kumar, Alok Thakar
Summary: Patients with single sided-deafness (SSD) have significant hearing disability compared to normal hearing individuals, affecting their quality of life in various domains. The study highlights the need for appropriate counseling and treatment options for these patients.
INDIAN JOURNAL OF OTOLARYNGOLOGY AND HEAD & NECK SURGERY
(2022)
