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
Engineering, Environmental
Yu Feng, Man Zhang, Yangjie Sun, Chunyan Cao, Jiancheng Wang, Mingzheng Ge, Weilong Cai, Jie Mi, Yuekun Lai
Summary: A sorbent with highly dispersed active components, Zn@MnOx/porous carbon nanofibers (PCNFs), was constructed in this study using electrospinning, carbonization, and hydrothermal techniques. The resulting sorbent exhibited a sulfur capacity of 9.63 g S 100 g(-1) sorbent and a utilization of 117% of ZnO, which can be attributed to the synergistic effects of the enlarged surface area of PCNFs and the uniformly distributed active components. The activation with KMnO4 not only generated active components MnOx but also provided seed sites for the attachment of Zn2+, promoting the high dispersion of active components. This method is beneficial for producing sorbents with improved structure and enhanced desulfurization performances.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Polymer Science
Yu-Chun Chiang, Wei-Ting Chin, Chih-Cheng Huang
Summary: Coaxial electrospinning is a useful method for producing HACNFs for CO2 capture, with carbonization temperature and CO2 activation affecting the structure and adsorption performance of the nanofibers. Increasing N=C and quaternary N groups can enhance CO2 adsorption, while maintaining the degradation rate of CO2 uptakes after cyclic runs is crucial for long-term performance.
Article
Engineering, Environmental
Ziwei Ru, Xin Zhang, Man Zhang, Jie Mi, Chunyan Cao, Zhifeng Yan, Mingzheng Ge, Hongchao Liu, Jiancheng Wang, Wei Zhang, Weilong Cai, Yuekun Lai, Yu Feng
Summary: This study proposes a method for producing ZnxCo3-xO4/carbon nanofiber sorbents with high active component utilization and excellent sulfur adsorption capacity through electrospinning, in situ hydrothermal growth, and carbonization techniques. The superior performance of ZnxCo3-xO4/CNFs can be attributed to the hierarchical structure and the well-dispersed ZnxCo3-xO4 nanoparticles.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Environmental
Xiao-Lu Sun, Zan Liu, Zhi-Lin Cheng
Summary: This report introduces the facile synthesis of carbon-nanofiber films reinforced by halloysite nanotubes (HNTs) via electrospinning, with the HNTs enhancing the mechanical performance of the carbon-nanofiber films. The higher N doping content in the N-doped carbon-nanofiber films resulted in higher strength and toughness, while maintaining good adsorption capability for sulfur compounds in oil.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Yu-Chun Chiang, Chih-Cheng Huang, Wei-Ting Chin
Summary: Electrospinning techniques were utilized to produce various structures of PAN-based activated carbon nanofibers, showcasing their potential for CO2 capture. The successful removal of PMMA and excellent CO2 adsorption capacity of the ACNFs were demonstrated in this study.
APPLIED SCIENCES-BASEL
(2021)
Article
Polymer Science
Xing Yang, Xianghua Wu, Zhaoyang Chen, Wenqiong Li, Qi-Jun Sun, Zeping Guo, Xiaoguang Liang, Yun He
Summary: Metal-organic-frameworks derived porous carbon fibers synthesized by electrospinning exhibit great potential in VOC adsorption. N-doped carbon nanofibers fabricated in N-2 atmosphere show enhanced benzene adsorption capacity due to synergistic effect of hierarchically porous structure and abundant N-species-containing active sites, while N-doped hierarchical carbon nanofibers fabricated in Ar atmosphere exhibit lower benzene adsorption attributed to porous structure damage caused by heavy Ar atoms during pyrolysis. These findings suggest promising application of N-CF-N-2 in VOCs adsorption for air purification and expand potential of electrospinning technology and composite fibers in volatile organic gas adsorption.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Engineering, Environmental
Zhen Liu, Zhuang Ma, Xiuxiu Pang, Mateen Ahmad, Yongchao Zhao, Ning Su, Jiangyu Liu, Ying Zhang, Hongman Sun, Fazle Subhan, Zifeng Yan
Summary: An electrospinning method was used to prepare nickel-based carbon fibers (NCF) and their adsorption desulfurization performance was compared with nickel-based carbon particles (NCP) obtained via traditional solid-state grinding method. The results showed that NCF had better adsorption desulfurization performance and regeneration properties compared to NCP.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Qiang Le, Zhilin Cheng
Summary: A nano-Ag2O/ZIF-8@PAN nanofiber membrane with low energy consumption and processing cost was successfully fabricated using electrospinning and microwave-assisted synthesis. It exhibited superior adsorption performance for thiophene from fuel oil.
APPLIED SURFACE SCIENCE
(2023)
Article
Polymer Science
Aiza Farhani Zakaria, Sazlinda Kamaruzaman, Norizah Abdul Rahman
Summary: The study fabricated ACNFs with potential as adsorbents for the removal of heavy metal contaminants through electrospinning technique. ACNFs showed higher adsorption capacity compared to CNFs after thermal and acid treatment, with a more porous and compact fiber structure.
Article
Chemistry, Applied
Qiang Le, Zan Liu, Zhilin Cheng
Summary: In this study, a novel core-shell nanostructured coaxial nanofiber membranes (CFMs) were produced using coaxial electrospinning. The CFMs consisted of core-shell structure nanofibers with Cu(I)/UIO-66 scattered in the shell layer and HNTs dispersed in the core layer. These CFMs showed superior adsorption performance and mechanical stability.
FUEL PROCESSING TECHNOLOGY
(2023)
Article
Energy & Fuels
Yang Liu, Junjie Liao, Liping Chang, Weiren Bao
Summary: This paper investigates the adsorption performance of silver-modified mesoporous materials in removing thiophenic compounds. The results show that the adsorption of thiophene by the sorbents involves S-Ag and pi complexation reactions, and the adsorption efficiency is greatly affected by benzene. XPS analysis reveals that silver interacts strongly with the carrier and forms Ag-O-Si bonds as the active centers for thiophenic compounds. The Mulliken charges of sulfur atoms have an impact on the interactions between silver and thiophene sulfur compounds.
Article
Chemistry, Physical
Qiang Le, Yang Xiang, Zan Liu, Zhilin Cheng
Summary: This study prepared a submicron-sized Cu2O necklace-shaped polyacrylonitrile nanofiber composite membrane (Cu2O/PAN NFM) using electrospinning technology. The Cu2O/PAN NFM exhibited larger pore volume, higher tensile strength, and lower friction coefficient compared to PAN nanofiber membrane. It showed good static and dynamic adsorption capacities for thiophene simulated oil, fitting the Avrami model and Liu isotherm. Moreover, the Cu2O/PAN NFM maintained sustainable adsorption capacity and demonstrated excellent mechanical properties and separation efficiency, making it a promising material for adsorption desulfurization.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Chemistry, Physical
He Wang, Haitao Niu, Hongjie Wang, Wenyu Wang, Xin Jin, Hongxia Wang, Hua Zhou, Tong Lin
Summary: A new type of carbon nanofibrous material with high specific surface area and unique porous structure has been developed, showing a supercapacitor electrode capacitance as high as 394 F g(-1). The carbon nanofibers maintain stable capacitance after 10,000 cycles of charge and discharge at 1.0 A g(-1).
JOURNAL OF POWER SOURCES
(2021)
Article
Engineering, Environmental
Zhihui Yao, Yuting Li, Daisong Chen, Yiwen Zhang, Xinghong Bao, Juan Wang, Qin Zhong
Summary: This study presents a feasible method to synthesize materials with well-dispersed β-Fe2O3 clusters in 1D porous carbon nanofibers through electrospinning, impregnation, and pyrolysis processes. The resulting material, β-Fe2O3@CNFs-12, exhibits remarkable ORR performance in alkaline electrolyte, outperforming commercial Pt/C, thanks to its well-designed 1D hierarchical porous structure and accessible β-Fe2O3 clusters embedded in carbon nanofibers.
CHEMICAL ENGINEERING JOURNAL
(2021)