Article
Energy & Fuels
John H. Jacobs, Nancy Chou, Kevin L. Lesage, Ye Xiao, Josephine M. Hill, Robert A. Marriott
Summary: Activated carbons have been found to possess good selective adsorption capability for removing sulfur dioxide from flue gas, especially in the presence of water. The activated carbons prepared with KOH and NaOH showcased the highest SO2 adsorption capacity under wet conditions. Additionally, the adsorption performance of all activated carbons remained unchanged after multicomponent adsorption of wet SO2.
Article
Energy & Fuels
Weimeng Zhao, Xinze Geng, Jincheng Lu, Yufeng Duan, Shuai Liu, Peng Hu, Yifan Xu, Yaji Huang, Jun Tao, Xiaobing Gu
Summary: The study demonstrated that brominated biomass activated carbon is an effective alternative adsorbent with good mercury removal performance in different scale experiments.
Article
Environmental Sciences
Chaoqun Li, Guorui Liu, Shuai Qin, Tingyu Zhu, Jianfei Song, Wenqing Xu
Summary: Sintering of iron ore is a major source of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) in the environment. Flue gas recirculation (FGR) and activated carbon (AC) are significant technologies for reducing PCDD/Fs and other pollutants from sintering exhaust gas. This study measured PCDD/Fs emissions during FGR and analyzed the impact of combining FGR and AC technologies. It was found that FGR removed 60.7% of PCDD/Fs by returning it to the high temperature bed, while AC further removed 95.2% through physical adsorption. Together, they achieved a removal rate of 98.1%.
ENVIRONMENTAL POLLUTION
(2023)
Article
Energy & Fuels
Hanyu Deng, Wenzhen Cai, Lanhe Zhang, Yanping Jia, Xiaoqiang Wang, Qing Zong, Guishi Cheng, Xiaoying Hu, Changqing Dong, Ying Zhao
Summary: The dry desulfurization technology of activated coke/carbon (AC) adsorption has been widely applied, especially in the industry that requires the feedstock H2SO4. This work conducted temperature-programmed experiments to study the thermal regeneration of spent activated carbon in flue gas desulfurization, focusing on the dominant reaction between adsorbed H2SO4 and carbon: 2H(2)SO(4) + C -> CO2 + 2H(2)Ogas + 2SO(2). The inhibitory effect of H(2)Ogas on regeneration was verified for the first time, which is useful for reducing carbon consumption.
Article
Green & Sustainable Science & Technology
Xiuwei Ma, Linjun Yang, Hao Wu
Summary: The removal of VOCs from coal-fired power plants is crucial in reducing emissions into the atmosphere. Adsorption on activated carbon is an effective method but can be affected by factors such as temperature and the presence of other gases. Competitive adsorption may occur when SO2, water vapor, and fly ash coexist, impacting the overall VOCs removal efficiency. Selecting activated carbon with large micropore volume and extending adsorption time can enhance the VOCs removal process.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Environmental Sciences
Hongyu Tian, Jian Pan, Deqing Zhu, Zhengqi Guo, Congcong Yang, Yuxiao Xue, Dingzheng Wang, Yingyu Wang
Summary: This research proposes an innovative one-step process for activated carbon production and direct reduction iron using low-rank coal. The activated carbon obtained through this process shows superior physical and chemical properties and performs well in desulfurization and denitrification.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Construction & Building Technology
Muhammad Riaz Ahmad, Mehran Khan, Aiguo Wang, Zuhua Zhang, Jian-Guo Dai
Summary: This study investigated the feasibility of using flue gas residues (FGR) and commercial sodium silicate (CSS) as hybrid activators (HA) for the preparation of alkali-activated materials (AAMs). The results showed that the use of hybrid activators led to the formation of more C-A-S-H gel compared to the control paste, which contained a higher amount of N-A-S-H gel. The analysis also revealed the presence of calcium-rich cross-linked gel (C-(N)-A-S-H) in all the pastes.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Energy & Fuels
Junjie Li, Hengdi Ye, Jinchao Wei, Bentao Yang, Shiqiu Gao, Kailing He
Summary: By using alkali metal K as a tracer, this study investigated the distribution and trapping mechanism of particulate matter (sintered ash and activated carbon powder) in an industrial two-stage moving bed purification system. The results showed that the capture rate of sintered ash by activated carbon in the primary adsorption tower was as high as 99.7%, and 65.92% of the sintered ash was captured in the middle chamber of the tower. The main trapping mechanisms were identified as inertial collision and interception diffusion settling. The trapped ash was recycled through the system with the activated carbon, and 99.9% of the ash was discharged with the sieved carbon powder from the desorption tower. The release of activated carbon powder in the secondary adsorption tower was identified as the key link affecting the concentration of particulate matter in the exit flue gas.
Article
Engineering, Chemical
A. Gomez-Aviles, M. Penas-Garzon, C. Belver, J. J. Rodriguez, J. Bedia
Summary: Activated carbons were prepared by chemical activation of lignin with FeCl3 using microwave heating, resulting in a microporous carbon with high surface area and acidic properties. The adsorption of acetaminophen reached about 300 mg.g(-1) at 60 degrees C, with an endothermic process and increased randomness observed. The kinetics was described by pseudo-second order model and breakthrough curves fitted well to various adsorption models, showing potential for application in water treatment.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Environmental Sciences
Caio Cesar Antonieti, Yovanka Perez Ginoris
Summary: Climate change and nutrient increase in aquatic environments have led to an increase in cyanobacterial blooms, which produce cyanotoxins. A carbon with high adsorption capacity for cyanotoxins was identified in this study and its operating time in a full-scale column was estimated. Wood carbon showed the best performance in removing cyanotoxins.
Article
Engineering, Chemical
Tan Zhao, Yajun Wei, Jiawei Wang, Qiang Wang, Yanli Chen, Xizheng Liu, Yunfeng Zhao
Summary: Coating a microporous carbon layer on the surface of zeolite 13X particles can enhance the CO2 adsorption capacity and selectivity by reducing the adverse effect of water molecules.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Environmental
Shilin Zhao, Yiren Liao, Xingyu Xie, Yuchen Wang, Zhiqiang Sun
Summary: In this study, the effects of carbon-based adsorbents on the removal of gaseous As2O3 emitted from the coal-fired power plant were investigated. It was found that BC showed the best removal ability, with the highest effectiveness at 150 degrees Celsius. Increasing the adsorption temperature facilitated the oxidation of As3+ and chemisorption mainly occurred through oxygen-containing functional groups and As2O3. The arsenic removal ability of the carbon-based adsorbents increased initially and then decreased with increasing adsorption temperature, and the change was mainly attributed to physical adsorption.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Environmental Sciences
Yuting Lin, Yuran Li, Zhicheng Xu, Junxiang Guo, Tingyu Zhu
Summary: Activated carbon consumption varies with different sulfur-containing products. The desorption of elemental sulfur consumes less oxygen and carbon functional groups, reducing the chemical carbon consumption by 59.8% compared to H2SO4. The compressive strength of activated carbon is less affected by the desorption of elemental sulfur.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Xiaoyu Zhang, Yuzhong Li, Zhuping Zhang, Maofeng Nie, Lu Wang, Hongwei Zhang
Summary: The study showed that activated carbons could achieve a removal efficiency of 19%-22% on CPM at 90 degrees Celsius, with higher adsorption effects on the inorganic fraction compared to the organic fraction. Additionally, at temperatures ranging from 35 to 170 degrees Celsius, the efficiency of CPM removal through AC adsorption increased as the flue gas temperature decreased.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Chemistry, Physical
Xiuwei Ma, Yong Hou, Linjun Yang, Hao Lv
Summary: Adsorbent injection is an efficient technique for flue gas purification, with the removal efficiency of VOCs being related to the pore size and distribution of activated carbon. Waste activated carbon can be reused, with a mixture containing 25% waste carbon showing similar removal efficiency to fresh carbon. In complex coal-combustion environments, the presence of p-xylene can decrease adsorption efficiency by 19.0%.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Toxicology
Sarva Mangala Praveena, Umer Rashid, Suraya Abdul Rashid
Summary: This study investigated the effect of experimental parameters on nutrient removal in synthetic greywater using activated carbon from banana trunk. The optimal method for optimization was determined to be Response Surface Methodology (RSM) with Box-Behnken Design. Increasing zinc chloride, activation time, and impregnation ratio was shown to enhance the removal of nitrate and phosphate in the synthetic greywater.
Article
Nanoscience & Nanotechnology
Celine Ming Hui Goh, Yie Hua Tan, N. M. Mubarak, Jibrail Kansedo, Umer Rashid, Mohammad Khalid, Rashmi Walvekar
Summary: This study utilized waste palm kernel shells to prepare recyclable magnetic catalysts, which were successfully used in the methanolysis of palm oil to produce biodiesel with high yield. Experimental factors were optimized, and the waste catalyst demonstrated good reusability and stability in the biodiesel production process.
APPLIED NANOSCIENCE
(2022)
Article
Environmental Sciences
Rose Fadzilah Abdullah, Umer Rashid, Balkis Hazmi, Mohd Lokman Ibrahim, Toshiki Tsubota, Fahad A. Alharthi
Summary: In this study, empty fruit bunch-based activated carbon (EFBHAC) was prepared using the HTC technique and functionalized with K2CO3 and Cu(NO3)(2) to produce a bifunctional nano-catalyst for waste cooking oil conversion. The physicochemical properties of the catalyst were investigated, showing promising results for high biodiesel yield. The transformation of waste cooking oil to biodiesel was confirmed, and the fuel properties of the biodiesel produced were analyzed, demonstrating the commercial potential of this approach.
Article
Chemistry, Physical
Aminul Islam, Srimonta Roy, Siow Hwa Teo, Shahjalal Khandaker, Yun Hin Taufiq-Yap, Azrina Abd Aziz, Minhaj Uddin Monir, Umer Rashid, Dai-Viet N. Vo, Mohd Lokman Ibrahim, Hussein Znad, Md Rabiul Awual
Summary: The global e-waste generation is expected to increase significantly in the coming years, which may have a negative impact on health and the environment if not managed properly. This study focuses on recovering palladium from ceramic capacitors using a solvent-ligand process, with findings showing high purity recovery of Pd(II) under optimized conditions and minimal environmental impact compared to other methods. This sustainable approach to precious metal recovery contributes to the circular economy.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Engineering, Environmental
Aroosh Shabbir, Hamid Mukhtar, Muhammad Waseem Mumtaz, Umer Rashid, Ghulam Abbas, Bryan R. Moser, Ali Alsalme, Tooba Touqeer, Chawalit Ngamcharussrivichai
Summary: Biodiesel produced from low-cost, inedible tallow using Lewatit-immobilized lipase showed promising fuel properties and reduced exhaust emissions compared to petro-diesel. The two-step chemical-mediated transesterification achieved a higher conversion rate compared to the single-step lipase-mediated method. The research also revealed the potential of waste animal fats for biodiesel production and a new efficient lipase source.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Environmental Sciences
Maria Khalil, Muhammad Asif Hanif, Umer Rashid, Junaid Ahmad, Ali Alsalme, Toshiki Tsubota
Summary: The present study focuses on the preparation and utilization of granite stone powder waste composite for the effective removal of Terasil dye. The results showed that the granite composites prepared using sodium metasilicate exhibited an exceptionally high dye adsorption capacity. Characterization techniques such as scanning electron microscopy and Fourier transform infrared spectroscopy were employed to determine the morphological features and functional groups of the granite composites.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Polymer Science
Aamna Ashfaq, Raziya Nadeem, Hongyu Gong, Umer Rashid, Saima Noreen, Shafique ur Rehman, Zubair Ahmed, Muhammad Adil, Nayab Akhtar, Muhammad Zeeshan Ashfaq, Fahad A. Alharthi, Elham Ahmed Kazerooni
Summary: This research study explored a simple, efficient, and environmentally friendly method for the biosorption of Cr(VI) ions using agrowaste-based adsorbents. The synthesized TiO2 nanocomposite was found to be the most effective in removing Cr(IV) from aqueous solution.
Article
Plant Sciences
Elham Ahmed Kazerooni, Abdullah Mohammed Al-Sadi, Umer Rashid, II-Doo Kim, Sang-Mo Kang, In-Jung Lee
Summary: The study found that salvianolic acid treatment can improve agronomic traits of soybean and maize seedlings under drought stress and enhance their survival rate under osmotic stress conditions. Salvianolic acid treatment also helps maintain the physiological functions of plants, reduce the accumulation of harmful substances, and regulate the expression of key genes.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Chemistry, Physical
Summayia Inam, Muhammad Asif Hanif, Umer Rashid, Farwa Nadeem, Fahad A. Alharthi, Elham Ahmed Kazerooni
Summary: This study aimed to improve the properties of biodiesel by utilizing interesterification and hydrolysis processes on Pongamia pinnata oil. The treated biodiesel showed better cold flow properties and met the international fuel standards.
Article
Chemistry, Physical
Balkis Hazmi, Umer Rashid, Sibudjing Kawi, Wan Nur Aini Wan Mokhtar, Firdous Ahmad Ahangar, Thomas Choong Shean Yaw, Toshiki Tsubota, Fahad A. Alharthi, Chawalit Ngamcharussrivichai
Summary: In this study, black carbon derived from PET wastes was used as a precursor to prepare a heterogeneous bifunctional nanocatalyst for the conversion of waste cooking oil into biodiesel. The optimized catalyst exhibited a maximum yield of 97.2% under the given reaction conditions and maintained catalytic activity up to six reaction cycles.
Article
Microbiology
Elham Ahmed Kazerooni, Sajeewa S. N. Maharachchikumbura, Abdullah Mohammed Al-Sadi, Umer Rashid, Sang-Mo Kang, In-Jung Lee
Summary: In this study, fungal strains isolated from the rhizosphere of healthy tomatoes were found to mitigate symptoms of drought and salinity stresses. These fungal strains exhibited plant growth promoting traits on solid media and positively impacted stressed tomato plants in a greenhouse experiment.
Article
Biochemistry & Molecular Biology
Balkis Hazmi, Mahnoush Beygisangchin, Umer Rashid, Wan Nur Aini Wan Mokhtar, Toshiki Tsubota, Ali Alsalme, Chawalit Ngamcharussrivichai
Summary: This study utilized the by-product glycerol from previous transesterification as a precursor for acid catalyst synthesis in biodiesel production. Sulfonated glycerol-SO3H and glycerol-ClSO3H were synthesized through sulfonation with sulfuric acid and chlorosulfonic acid, respectively. Various analytical techniques were used to characterize the synthesized catalysts, which showed mesoporous structures but low surface areas. The acidity of the catalysts was sufficient for catalyzing biodiesel production, and optimal reaction conditions were determined. The catalysts could be reused for three reaction cycles but experienced deactivation.
Article
Environmental Sciences
Ifrah Javed, Muhammad Asif Hanif, Umer Rashid, Farwa Nadeem, Fahad A. Alharthi, Elham Ahmed Kazerooni
Summary: The combination of adsorption process and electrocoagulation is an effective technique for dye removal. In this study, calcinized and non-calcinized composites based on bentonite and sodium zeolite were prepared and tested for the adsorptive removal of different dyes. Factors such as contact time, initial dye concentration, and temperature were investigated. The results showed that the calcinized nano-composite material had better adsorption capacity and could be used as a low-cost alternative for dye removal.
Article
Chemistry, Physical
Hafiza Qurat ul Ain Sami, Muhammad Asif Hanif, Umer Rashid, Shafaq Nisar, Ijaz Ahmad Bhatti, Samuel Lalthazuala Rokhum, Toshiki Tsubota, Ali Alsalme
Summary: Biodiesel is an alternative fuel with significant economic, environmental, and social benefits. Conventional biodiesel production is expensive due to high industrial production costs, mainly from raw materials. This research focuses on using magnetic nano-catalysts to produce biodiesel, which have easy recovery, recyclability, selectivity, and fast reaction rates. The nano-catalysts were found to be efficient in transesterifying Pongamia pinnata oil, with high yields achieved after 2 hours of reaction time at 60 degrees C. The synthesized nano-catalysts could be recovered and reused multiple times without losing activity.
Article
Chemistry, Applied
Umer Rashid, Balkis Hazmi, Rose Fadzilah Abdullah, Siti Fadhilah Ibrahim, Ali Alsalme, Toshiki Tsubota
Summary: In this study, palm kernel shell-based char was developed and utilized for synthesizing bifunctional carbon catalyst. The catalyst showed higher surface area and stronger acid-base properties, making it suitable for efficient esterification and transesterification reactions.
TOPICS IN CATALYSIS
(2023)
Correction
Chemistry, Applied
Jia Liu, Juntong Dong, Xiaodan Li, Teng Xu, Zhenguo Li, Jeffrey Dankwa Ampah, Mubasher Ikram, Shihai Zhang, Chao Jin, Zhenlong Geng, Tianyun Sun, Haifeng Liu
FUEL PROCESSING TECHNOLOGY
(2024)
Article
Chemistry, Applied
Seba Alareeqi, Daniel Bahamon, Kyriaki Polychronopoulou, Lourdes F. Vega
Summary: This study explores the potential application of single-atom-alloy (SAA) catalysts in bio-oils hydrodeoxygenation refining using density functional theory (DFT) and microkinetic modeling. It establishes the relationships between stability, adsorptive properties, and activity structures for bio-oil derivatives, providing guidance for the synthesis of cost-effective SAA combinations.
FUEL PROCESSING TECHNOLOGY
(2024)
Article
Chemistry, Applied
Bin Hu, Wen -Ming Zhang, Xue-Wen Guo, Ji Liu, Xiao Yang, Qiang Lu
Summary: This study explored the pyrolysis behaviors and mechanisms of different monosaccharides, including arabinose, galactose, galacturonic acid, and glucuronic acid. The roles of structural differences in these monosaccharides were analyzed, and it was found that glucuronic acid undergoes a special C-C bond breaking reaction during pyrolysis. The findings provide a deep understanding of the pyrolysis chemistry of hemicellulose and the role of different branches.
FUEL PROCESSING TECHNOLOGY
(2024)
Review
Chemistry, Applied
Youwei Zhi, Donghai Xu, Guanyu Jiang, Wanpeng Yang, Zhilin Chen, Peigao Duan, Jie Zhang
Summary: Hydrothermal carbonization (HTC) is an effective method for the harmless disposal of municipal sludge (MS) and offers potential applications for the obtained products. Optimizing reaction conditions, coupling with other waste materials, and combining different processes can improve the performance of HTC. Furthermore, HTC contributes to energy recovery and enhances the quality of life cycle assessment.
FUEL PROCESSING TECHNOLOGY
(2024)
Article
Chemistry, Applied
Jia Wang, Jianchun Jiang, Dongxian Li, Xianzhi Meng, Arthur J. Ragauskas
Summary: This study presents a scalable process for converting holocellulose and cellulosic wastes into advanced oxygen-containing biofuels with high furan, cyclic ketone, and ethanol content. By combining hydropyrolysis and vapor-phase hydrodeoxygenation using Pd/Al2O3 as a catalyst, the researchers achieved high yields and conversions. The integrated process holds great promise for biomass waste conversion into advanced biofuels.
FUEL PROCESSING TECHNOLOGY
(2024)
Article
Chemistry, Applied
Florian Held, Jannis Reusch, Steffen Salenbauch, Christian Hasse
Summary: The accurate prediction and assessment of soot emissions in internal combustion engines are crucial for the development of sustainable powertrains. This study presents a detailed quadrature-based method of moments (QMOM) soot model coupled with a state-of-the-art flow solver for the simulation of gasoline engines. The model accurately describes the entire cause-and-effect chain of soot formation, growth and oxidation. Experimental validation and engine cycle simulations are used to identify the root cause of observed soot formation hotspots.
FUEL PROCESSING TECHNOLOGY
(2024)
