Review
Engineering, Chemical
Peng Cen, Xue Bian, Zhannian Liu, Manyi Gu, Wenyuan Wu, Baokuan Li
Summary: Rare earth elements play an indispensable role in modern high technology, making the efficient exploitation and utilization of rare earth resources crucial. Current industrial processes are chemical and energy intensive, leading to negative impacts on the environment, thus further improvement towards cleaner production is necessary.
MINERALS ENGINEERING
(2021)
Article
Engineering, Chemical
Chenhao Liu, Hepeng Zhang, Bing Luo, Liqing Li, Xiaoqi Sun
Summary: The extraction-precipitation method using N-lauroyl sarcosine as the precipitant shows a specific precipitation ability for rare earth, and a new enrichment process for bastnaesite leachate is developed to effectively remove impurities and reduce energy consumption and carbon emission.
MINERALS ENGINEERING
(2022)
Article
Chemistry, Applied
Sheng Chang, Mei Li, Kai Gao, Dongliang Zhang, Haijun Duan, Linlin Ma, Zheng Ruan
Summary: The study investigated the mechanism of phthalic acid as a dicarboxylic acid collector in the flotation separation of fluorite and rare earth minerals. Experimental data showed that phthalic acid could efficiently separate the two minerals under weakly acidic conditions. The adsorption mechanism analysis revealed the formation of stable polycyclic calcium phthalate complex on the surface of fluorite.
JOURNAL OF RARE EARTHS
(2022)
Article
Chemistry, Physical
Qingmin Nie, Tingsheng Qiu, Huashan Yan, Yonggai Li
Summary: In this study, an eco-friendly depressant polyepoxysuccinic acid (PESA) was used for the flotation separation of bastnaesite from fluorite. The results showed that PESA had a strong depression effect on fluorite while having a negligible impact on bastnaesite. The addition of PESA also impeded the adsorption of octyl hydroxamic acid (OHA) on fluorite surface, which confirmed the selective depressant effect of PESA.
APPLIED SURFACE SCIENCE
(2022)
Article
Engineering, Chemical
Chunlei Guo, Shaochun Hou, Weiwei Wang, Hailong Jin
Summary: In this study, xanthan gum was evaluated as a novel depressant for the flotation separation of bastnaesite and fluorite. The results showed that xanthan gum exhibited high selectivity in depressing fluorite while having minimal impact on bastnaesite. The adsorption of xanthan gum occurred on both bastnaesite and fluorite surfaces, hindering the subsequent adsorption of octyl hydroxamic acid on fluorite.
MINERALS ENGINEERING
(2022)
Review
Green & Sustainable Science & Technology
Shaoqu Xie, Zhuoxi Li, Guodian Zhu, Wenli Song, Conghua Yi
Summary: This article critically reviews the properties, production, and application of bio-based 2,3-butanediol (2,3-BD). Efforts have been made to increase the concentration of 2,3-BD in fermentation broth by screening suitable producing bacteria and studying factors affecting the productivity. However, the conventional distillation process for industrial production of 2,3-BD by the biological method is extremely challenging. Therefore, the development of efficient and low-cost separation processes is crucial.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Chemistry, Applied
Zhao Cao, Zeyu Cheng, Jieliang Wang, Yongdan Cao
Summary: This study investigates the effect of Ca2+ ions and sodium silicate individually or in combination on bastnaesite flotation. The results show that the combination of Ca2+ ions and sodium silicate more severely depresses bastnaesite due to their synergistic effect.
JOURNAL OF RARE EARTHS
(2022)
Article
Materials Science, Ceramics
Yueh-Cheng Yu, William O. O. Nachlas, David L. L. Poerschke
Summary: This study investigated the stability limits of rare earth aluminates containing mixtures of RE cations. It was found that it is difficult to form equimolar mixed-RE aluminates, as the RE ions selectively partition into specific phases based on size trends. These results are important for understanding phase stability, cation partition trends, and potential applications.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Dzenita Avdibegovic, Koen Binnemans
Summary: The study investigated the separation of rare-earth elements (REEs) from iron and cobalt components using column chromatography, successfully recovering REEs from the leachates of magnets. The carboxylic-acid functionalized supported ionic liquid phase (SILP) showed high affinity towards trivalent cations of REEs, highlighting its effectiveness in the process.
Article
Chemistry, Applied
Wenjie Zhang, Dongxia Feng, Xian Xie, Xiong Tong, Yunpeng Du, Yang Cao
Summary: Solvent extraction is a crucial method for rare earth extraction and separation. In this study, the unsaponification extraction of light rare earth ions in a hydrochloric acid medium by the HDEHPP350 system was investigated. The results show that HDEHP-P350 has a good separation effect for light rare earths and is easy to strip. The structure of the extracted complex is determined through analysis and discussion.
JOURNAL OF RARE EARTHS
(2022)
Article
Engineering, Chemical
Hongxiang Xu, Li Zhang, Zengrui Pang, Zhenlei Wang, Weichao Li, Jiushuai Deng
Summary: Ionic liquids have been widely used for metal ion extraction and separation due to their excellent dissolving and selecting ability. A suitable ionic liquid, [N1888][P507], was selected using the COSMO-RS method, and when mixed with TRPO, it showed high extractabilities and selectivities for heavy rare earths, making it an effective and environmentally friendly option for extraction and separation processes.
MINERALS ENGINEERING
(2022)
Article
Engineering, Chemical
Chang Liu, Longhua Xu, Jiushuai Deng, Donghui Wang, Kai Xue, Yan Wang, Lin Jing
Summary: In this study, a novel cationic Gemini surfactant, EDDA, was designed and synthesized for the separation of bastnaesite from calcite. The results showed that EDDA exhibited excellent selective collecting ability for bastnaesite, with higher grade and recovery compared to other collectors. The adsorption mechanism of EDDA on bastnaesite surface was investigated and the results indicated that EDDA enhanced the hydrophobicity of bastnaesite through electrostatic and hydrogen bonding interactions.
MINERALS ENGINEERING
(2022)
Article
Engineering, Chemical
Weiwei Wang, Erdou Li, Zhangkuang Peng, Chunlei Guo, Shaochun Hou, Qiang Li
Summary: In this study, an environmentally friendly depressant, dextrin hydrate (DH), was introduced for the flotation separation of bastnaesite from monazite. The results showed that the recovery of monazite decreased significantly in the presence of DH, while the recovery of bastnaesite only exhibited a slight reduction. The mechanism was found to be related to the adsorption of DH on the Ce sites of monazite, which had a strong effect on the subsequent adsorption of the collector on the surface of monazite.
MINERALS ENGINEERING
(2023)
Article
Engineering, Environmental
Amrita Das, K. R. S. Chandrakumar, Bhaskar Paul, Jagannath Gupta, Nidhi Gupta, Ajoy K. Singh, Vivekanand Kain
Summary: Separation of hard actinides from rare earth metal ions is a challenging task that requires selecting suitable ligands. In this study, two oxygen donating ligands were synthesized and tested for their ability to separate hard actinides and rare earths. The binding of metal ions with the adsorbents was found to be controlled by the anions present in the aqueous medium.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Environmental Studies
Sulgiye Park, Cameron L. Tracy, Rodney C. Ewing
Summary: China has dominated the global production of rare-earth elements (REE) since the 1990s, primarily due to domestic factors. The decline in US REE production, which facilitated China's market dominance, can be attributed to a misalignment between the US government and corporate interests. Strategic cooperation between China and the US in the REE sector could diversify and improve the resilience of supply chains, mitigating potential economic and national security risks.
Article
Chemistry, Applied
Zongcheng Miao, Chao Qi, Liangshi Wang, Allison M. Wensley, Yi Luan
APPLIED ORGANOMETALLIC CHEMISTRY
(2017)
Article
Chemistry, Multidisciplinary
Xiaowei Huang, Jinshi Dong, Liangshi Wang, Zongyu Feng, Qiannan Xue, Xianglong Meng
Article
Metallurgy & Metallurgical Engineering
Jinyu Wang, Xiaowei Huang, Liangshi Wang, Qiang Wang, Yannan Yan, Na Zhao, Dali Cui, Zongyu Feng
Article
Biochemical Research Methods
Yun-Yan Liu, Long-Sheng Zhao, Xiu-Ping Song, Peng-Chen Du, Dong-Mei Li, Zhong-Ke Chen, Qi-Yong Liu
JOURNAL OF MICROBIOLOGICAL METHODS
(2017)
Article
Chemistry, Applied
Xue Qiannan, Huang Xiaowei, Zhang He, Xu Hong, Zhang Jianxing, Wang Liangshi
JOURNAL OF RARE EARTHS
(2017)
Article
Chemistry, Multidisciplinary
Jianxing Zhang, Xiaowei Huang, He Zhang, Qiannan Xue, Hong Xu, Liangshi Wang, Zongyu Feng
Review
Engineering, Environmental
Shengxi Wu, Liangshi Wang, Longsheng Zhao, Patrick Zhang, Hassan El-Shall, Brij Moudgil, Xiaowei Huang, Lifeng Zhang
CHEMICAL ENGINEERING JOURNAL
(2018)
Article
Metallurgy & Metallurgical Engineering
Shengxi Wu, Liangshi Wang, Patrick Zhang, Hassan El-Shall, Brij Moudgil, Xiaowei Huang, Longsheng Zhao, Lifeng Zhang, Zongyu Feng
Article
Chemistry, Applied
Longsheng Zhao, Liangshi Wang, Genghong Shuai, Zhiqi Long, Dali Cui, Xiaowei Huang
JOURNAL OF RARE EARTHS
(2018)
Article
Chemistry, Applied
Shengxi Wu, Longsheng Zhao, Liangshi Wang, Xiaowei Huang, Yunhan Zhang, Zongyu Feng, Dali Cui
JOURNAL OF RARE EARTHS
(2019)
Article
Chemistry, Applied
Shengxi Wu, Longsheng Zhao, Liangshi Wang, Xiaowei Huang, Yunhan Zhang, Zongyu Feng, Dali Cui
JOURNAL OF RARE EARTHS
(2019)
Review
Chemistry, Applied
Yannan Yan, Yang Xu, Xiaowei Huang, Zongyu Feng, Yongke Hou, Kai Li, Liangshi Wang, Yihanna Hu
JOURNAL OF RARE EARTHS
(2019)
Article
Metallurgy & Metallurgical Engineering
Sheng-xi Wu, Long-sheng Zhao, Liang-shi Wang, Xiao-wei Huang, Jin-shi Dong, Zong-yu Feng, Da-li Cui, Li-feng Zhang
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2018)
Article
Engineering, Environmental
Jinyu Wang, Yang Xu, Liangshi Wang, Longsheng Zhao, Qiang Wang, Dali Cui, Zhiqi Long, Xiaowei Huang
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2017)
Article
Green & Sustainable Science & Technology
Lars odegaard Bentsen, Narada Dilp Warakagoda, Roy Stenbro, Paal Engelstad
Summary: This study investigates uncertainty modeling in wind power forecasting using different parametric and non-parametric methods. Johnson's SU distribution is found to outperform Gaussian distributions in predicting wind power. This research contributes to the literature by introducing Johnson's SU distribution as a candidate for probabilistic wind forecasting.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Xing Liu, Qiuchen Wang, Yunhao Wen, Long Li, Xinfang Zhang, Yi Wang
Summary: This study analyzes the characteristics of process parameters in three lean gas ethane recovery processes and establishes a prediction and multiobjective optimization model for ethane recovery and system energy consumption. A new method for comparing ethane recovery processes for lean gas is proposed, and the addition of extra coolers improves the ethane recovery. The support vector regression model based on grey wolf optimization demonstrates the highest prediction accuracy, and the multiobjective multiverse optimization algorithm shows the best optimization performance and diversity in the solutions.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Cairong Song, Haidong Yang, Xian-Bing Meng, Pan Yang, Jianyang Cai, Hao Bao, Kangkang Xu
Summary: The paper proposes a novel deep learning-based prediction framework, aTCN-LSTM, for accurate cooling load predictions. The framework utilizes a gate-controlled multi-head temporal convolutional network and a sparse probabilistic self-attention mechanism with a bidirectional long short-term memory network to capture both temporal and long-term dependencies in the cooling load sequences. Experimental results demonstrate the effectiveness and superiority of the proposed method, which can serve as an effective guide for HVAC chiller scheduling and demand management initiatives.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Zhe Chen, Xiaojing Li, Xianli Xia, Jizhou Zhang
Summary: This study uses survey data from the Loess Plateau in China to evaluate the impact of social interaction on the adoption of soil and water conservation (SWC) technology by farmers. The study finds that social interaction increases the likelihood of farmers adopting SWC, and internet use moderates this effect. The positive impact of social interaction on SWC adoption is more pronounced for farmers in larger villages and those who join cooperative societies.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Chenghua Zhang, Yunfei Yan, Kaiming Shen, Zongguo Xue, Jingxiang You, Yonghong Wu, Ziqiang He
Summary: This paper reports a novel method that significantly improves combustion performance, including heat transfer enhancement under steady-state conditions and adaptive stable flame regulation under velocity sudden increase.
JOURNAL OF CLEANER PRODUCTION
(2024)