Article
Engineering, Electrical & Electronic
Sheng-Lyang Jang, Hung-Wei Lai, Jiun-Yu Sung
Summary: This letter proposes a CMOS divide-by-16 injectionlocked frequency divider with a divide-by-4 ring-oscillator frequency divider stacked on a capacitive cross-coupled LC divide-by-4 ILFD, providing a locking range from 10.76 to 12.6 GHz at a power consumption of 123 mW.
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS
(2022)
Article
Biochemistry & Molecular Biology
Elodie Melro, Hugo Duarte, Filipe E. Antunes, Artur J. M. Valente, Anabela Romano, Magnus Norgren, Bruno Medronho
Summary: A new type of foam material was developed by partially substituting non-sustainable phenol with lignin extracted from pine wood residues using a green levulinic acid-based solvent. The novel foams were compared to commercially available lignin-based foams in terms of various features, including foam density, microstructure, surface hydrophilicity, chemical grafting, and mechanical and thermal properties. The research showed that up to 30 wt% of phenol can be replaced without compromising the foam properties, indicating the potential of lignin-based foams as sustainable and renewable alternatives to petrol-based counterparts.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Energy & Fuels
Zhenghong Zhao, Zewu Zhang, Xiaojian Zha, Ge Gao, Xiaoshan Li, Fan Wu, Cong Luo, Liqi Zhang
Summary: This study evaluates the feasibility of direct steam injection for forming an H2O-rich environment in MILD oxy combustion. The results show that inner-steam injection is better in controlling temperature rise and fluctuation, and maintaining MILD combustion. Inner-steam injection also inhibits fuel-N oxidation and enhances NO-reburning, leading to lower NO emission concentration.
Article
Computer Science, Information Systems
Sheng-Lyang Jang, Chia-Tung Hsieh, Tzu-Chin Yang, Miin-Horng Juang
Summary: This paper introduces a CMOS divide-by-8 injection locked frequency divider with a locking range from 15.5 GHz to 17.8 GHz and a small area of 0.8044 x 0.72 mm(2). It can also operate in a divide-by-4 mode with a locking range from 4.8 GHz to 10.6 GHz. The design flexibility is achieved through an unbalanced approach, allowing for optimized circuit performance.
Article
Green & Sustainable Science & Technology
Yufei Wang, Qianqian Liu, Long Yan, Jian Li, Gang Xie, Sanping Chen, Jianjun Wu
Summary: This study presents a novel reutilization strategy for semi-coking wastewater, converting phenols and ammonias into thermoset phenolic resin. The reaction with formaldehyde effectively removes pollutants and enables economic reutilization of the wastewater.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Energy & Fuels
Cuiliu Zhang, Listopadov Vladislav, Runsheng Xu, Grachev Sergey, Kexin Jiao, Jianliang Zhang, Tao Li, Ternovykh Aleksei, Chuan Wang, Guangwei Wang
Summary: Natural gas can replace part of the pulverized coal in blast furnace injection, and numerical simulation is used to compare and analyze the differences between mixed injection of natural gas and pulverized coal and single injection of coal. The results show that natural gas injection increases the temperature near the tuyere wall but decreases the average temperature in the raceway. The injection parameters have an effect on the combustion performance of pulverized coal, with increasing natural gas lance diameter resulting in decreased burnout of pulverized coal. The change in natural gas lance position has a relatively small effect, and increasing natural gas injection rate reduces the burnout of pulverized coal and CO2 emissions.
Article
Thermodynamics
Kai Wang, Jianliang Zhang, Heng Zhou, Jun Ni, Yifan Hu, Jian Huang, Shuo Li, Xiaodong Ma, Shengli Wu, Mingyin Kou
Summary: Natural gas injection into blast furnace is considered as an efficient and promising method to reduce carbon emissions in the iron and steel industry. A three-dimensional model considering the co-injection of natural gas and pulverized coal was established to study the co-injection behaviors. The effects of natural gas injection volume and different thermal compensation measures on the coal burnout rate were investigated. Results showed that the average temperature in the raceway and the coal burnout rate decreased after the injection of natural gas into the blast furnace. It is suggested to decrease the coal rate and increase the oxygen enrichment ratio for better coal burnout rate in blast furnace with natural gas and pulverized coal co-injection.
APPLIED THERMAL ENGINEERING
(2023)
Article
Materials Science, Paper & Wood
Xiteng Xian, Shubin Wu, Wenguang Wei, Fengshan Zhang
Summary: Pretreatment of kraft technical lignin from coniferous wood with a deep eutectic solvent composed of ZnCl2/lactic acid can improve the reactive sites, leading to higher bond strength of the lignin-phenol-formaldehyde adhesive. When the substitution degree of modified lignin for phenol reached 70%, it met the requirements of the Chinese national standard.
Article
Engineering, Electrical & Electronic
Chengjia Lu, Bo Zhou, Qingyun Chang, Jiaxing Lei
Summary: An improved topology of the third-harmonic injection two-stage matrix converter (3TSMC) is proposed in this article, which ensures independent control capability of input reactive power and high-quality mains current waveforms by controlling the active and reactive components of the injected current.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Energy & Fuels
Xiaopeng Pei, Hong Li, Zisheng Zhang, Ying Meng, Xingang Li, Xin Gao
Summary: A novel reactive distillation followed by pressure-swing distillation process was proposed for the production of trioxane. Experimental results showed that this process could significantly improve the formaldehyde conversion rate and reduce energy consumption.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2022)
Article
Green & Sustainable Science & Technology
Jue Tang, Mansheng Chu, Feng Li, Zedong Zhang, Yating Tang, Zhenggen Liu, Junichiro Yagi
Summary: The study showed that injecting H-2 into the blast furnace leads to stable operation, increased productivity, reduced environmental impacts, especially a significant decrease in CO2 emissions.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Energy & Fuels
Lingling Liu, Shibo Kuang, Lulu Jiao, Baoyu Guo, Aibing Yu
Summary: This study presents a numerical investigation on the effects of pulverized coal injection (PCI) in an industrial blast furnace. The results show that appropriate oxygen enrichment and suitable burden distribution can enhance the maximum operable PCI rate, while excessive oxygen enrichment increases coke consumption. The integrated model used in this study can serve as a cost-effective tool to optimize PCI effects on blast furnace performance.
Article
Thermodynamics
Qiangjian Gao, Xuhang Xiao, Zhiyuan Suo, Fang Long, Fengman Shen
Summary: Pulverized coal blending with iron-bearing dust injection technology in blast furnace iron-making process can effectively utilize the iron-bearing dust. This study focused on the co-flow property, thermal reactivity, and unburned coal distribution in the blast furnace. It was found that the blends of pulverized coal and iron-bearing dust can be smoothly transported and accelerate the combustion process. The addition of iron-bearing dust improved the comprehensive combustibility, ignition, and burnout of the coal. The combustion activation energy decreased after adding the iron-bearing dust, and the accumulation of unburned coal in the blast furnace decreased.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Engineering, Chemical
Peyman Pouresmaeel Selakjani, Ali Dorieh, Antonio Pizzi, Mohammad Hassan Shahavi, Amir Hasankhah, Sara Shekarsaraee, Marzieh Ashouri, Sogand Ghafari Movahed, Mohadese Niksefat Abatari
Summary: This study successfully reduced the free formaldehyde emission of medium density fiberboard by adding phenolic compounds to urea-formaldehyde polymer, resulting in improved water resistance and lower thickness swelling, thus showing potential benefits for the production industry.
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
(2021)
Article
Energy & Fuels
Sheng-Yen Hsu, Shan-Wen Du, Yuan-Yi Yang, Chien-Hsiung Tsai, Wei-Hsin Chen
Summary: The blast furnace ironmaking process is energy-consuming, and the use of pulverized coal injection (PCI) technique can reduce CO2 emissions. This study focuses on the conveying solid-gas ratio (SGR) and oxygen enrichment in a PCI system using a lance-blowpipe-tuyere-raceway model. The results show that optimizing SGR and oxygen enrichment can significantly improve coal combustion.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
