Article
Energy & Fuels
Shujun Zhu, Jianguo Zhu, Qinggang Lyu, Chengbo Man, Ziqu Ouyang, Jingzhang Liu, Hongliang Ding, Yuhua Liu, Xiaoyu Zhang
Summary: This study achieved stable high-efficiency and low-NOx combustion of weakly caking coal by preheating fuel in a PCFB. High preheating temperature and fluidizing gas velocity helped alleviate or resolve preheating instability, while arranging combustion air position effectively reduced NO emissions. The findings highlight the potential of preheating combustion technology for improving combustion performance and reducing emissions.
Article
Energy & Fuels
Song Yang, Junjie Liu, Mingyi Wang, Bowen Ren, Shoujun Liu, Yadong Bai
Summary: The hydro-modification mechanism of subbituminous coal was investigated using the isotope trace method. The results showed that the yield and caking index of modified coal increased under H2-THN, indicating the presence of bonding components in the extracts. The analysis of modified coal under different conditions confirmed that more hydrogen atoms from H2 and THN entered the modified coal with high GRI.
Article
Chemistry, Analytical
Xianzhong Cao, Jingchong Yan, Zhicai Wang, Zhiping Lei, Shibiao Ren, Shigang Kang, Zhanku Li, Hengfu Shui
Summary: This study investigates the effects of different solvents on Xilinguole lignite and coking coal through thermal dissolutions, and evaluates the feasibility of using the soluble fractions for coke-making. The results show that methanol significantly enhances the yield of soluble fractions for Xilinguole lignite and can effectively substitute fat coal to improve the quality of coke.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2022)
Article
Chemistry, Physical
Chunyan Li, Yiping Zheng, Minghui Li, Biyun Fang, Jianxin Lin, Jun Ni, Xiuyun Wang, Bingyu Lin, Lilong Jiang
Summary: The presence of Ce species in Ru/La2O3 catalyst enhances the proportion of metallic ruthenium species and promotes the desorption of hydrogen.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Energy & Fuels
Yanjun Zhang, Shansong Gao, Jing Xie, Hongxue Wang, Geping Shu
Summary: This study investigates the synergistic effect of oil-coal co-hydrogenation and the relationship between H2 consumption and hydrogenation performance. It is found that H2 consumption is closely related to the severity of reaction and positively correlated with the conversion of raw material and oil yield. Hydrogen-donor solvent (HDS) rich in partially hydrogenated polycyclic aromatic hydrocarbons can enhance the synergistic effect of oil-coal co-hydrogenation, inhibit coke formation, and improve product distribution.
Article
Chemistry, Analytical
Linyang Zhang, Zishen Qiao, Jingsong Wang, Guang Wang, Haibin Zuo, Xuefeng She, Qingguo Xue
Summary: The study investigated the mechanism of rapid preheating to enhance the caking property of coking coal by analyzing the molecular structure evolution during different heating rates. The results showed that rapid preheating altered the molecular structure of coal, strengthened hydrogen bonding, and generated more bonding phases, ultimately enhancing the caking property of the coal. This research provides valuable insights for expanding the utilization of weakly-caking coal in the coking process.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2022)
Article
Metallurgy & Metallurgical Engineering
Hiroshi Otsuka, Yusuke Dohi, Takashi Matsui, Kazutoshi Hanada
Summary: Adding aromatic amines, particularly N, N'-di-2-naphthy1-1, 4-phenylenediamine (DNPD), can enhance the fluidity of coal and improve coke strength. Additional studies showed that even a small amount of DNPD greatly improved the flowability of blended coal and the strength of coke.
TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN
(2021)
Article
Energy & Fuels
Yaru Zhang, Jinfeng Bai, Xiangyun Zhong, Lijun Jin, Yang Li, Haoquan Hu
Summary: The study demonstrates the use of RFMI obtained from the modified FAMM technique in evaluating coking coal, showing a linear correlation with vitrinite reflectance and increased sensitivity to coking properties. This can serve as a powerful supplement to existing coal evaluation standards.
Article
Materials Science, Multidisciplinary
Sara Azmi, Amelia Klimek, Elzbieta Frackowiak
Summary: Urea can improve the corrosion resistance and electrochemical performance of carbon electrode-based capacitors in aqueous electrolytes without affecting the electrolyte conductivity.
Article
Chemistry, Physical
Noratiqah Sazelee, Nurul Amirah Ali, Mohammad Ismail, Sami-Ullah Rather, Hisham S. Bamufleh, Hesham Alhumade, Aqeel Ahmad Taimoor, Usman Saeed
Summary: LiAlH4 is a promising material for hydrogen storage due to its high hydrogen storage capacity and release at a moderate temperature. However, it suffers from slow kinetics and irreversibility issues. This study focused on reducing the onset desorption temperature and quickening the desorption kinetics of LiAlH4. By adding 10 wt.% of LaCoO3, the desorption temperature of LiAlH4 decreased to 70℃ for the first stage and 156℃ for the second stage. Moreover, LiAlH4 + 10 wt.% LaCoO3 desorbed 3.37 wt.% H2 at 90℃ in 80 min, which was 10 times faster than the unsubstituted samples. The in situ formation of AlCo and La or La-containing species in the presence of LaCoO3 contributed to the enhanced hydrogen desorption kinetics of LiAlH4.
Article
Green & Sustainable Science & Technology
Huaming Dai, Huiwei Zhu
Summary: This study investigated the effects of partial oxidation combustion in porous media on temperature distribution and methane conversion, and found that the addition of an appropriate free section can improve the reforming efficiency.
Article
Energy & Fuels
Jia-Kai Bai, Xiao-Bin Zhang, Wang Li, Xing-Bao Wang, Zhen-Yi Du, Wen-Ying Li
Summary: In this study, the hydrogen-donating activity of hydrogen-donor solvents (H-donors) was investigated to determine their impact on the sustainability of direct coal liquefaction. The results showed that hyperconjugation and ring strain are key factors affecting the hydrogen-donating activity of H-donors. Additionally, the length of alkyl substituents and isomerization play significant roles in determining the hydrogen-donating activity.
Article
Chemistry, Physical
Xiao-Feng Wu, Zhen-Cheng Wang, Ke-Yan Wang, Rong-Da Zhao, Fu-Fa Wu
Summary: Cu addition in Al-10Mg(2)Si alloys effectively refines grain structure and modifies eutectic morphology, resulting in improved strength and ductility of the alloy with a transformation of failure mode from brittle to ductile.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Xiaobo Shen, Xuening Zhang, Qiuping Xiao, Haifeng Liu
Summary: This paper investigates the two-step thermal decomposition properties of LiAlH4 with and without Fe-Fe2O3 catalysts, and finds that doping catalysts can significantly decrease activation energies and improve hydrogen release properties.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Multidisciplinary
Yuqiong Zhao, Shouqi He, Qingxiang Guo, Guoqiang Li, Liping Wang, Yunbo Liu, Yongfa Zhang
Summary: The presence of FeS catalyst significantly improves the caking property of lignite, promotes the decomposition and hydrogenation of coal, and leads to the generation of more active hydrogen. This contributes to the development of plastic materials and the enhancement of caking property of lignite.
