CHEN CHEN

2 weeks ago | dx.doi.org | CHEN CHEN |Cengceng Du |Zhenyu Wang |Xin Chen

1 month ago | nature.com | Yihan Wang |CHEN CHEN |Yuan Tao |Zongguo Wen

Hydrogen-based direct reduced iron (H2-DRI) is crucial for decarbonizing the steel sector but is limited by the availability of renewable energy. Here, we propose H2-DRI deployment schemes in China’s steel sector at moderate and aggressive scales, incorporating three renewable energy sources with a resolution of 1 km × 1 km across 570 steel units. Results indicate that 52.6–55.8% of China’s current steel units lack sufficient renewable energy supply for H2-DRI deployment due to uneven distribution of these energy sources. Renewable energy can fulfill 97-100% of hydrogen demand at the moderate scale, whereas the aggressive scale requires supplemented fossil fuels accounting for one-third to one-half. H2-DRI can decarbonize steel production to 0.15–0.91 t CO2 t-1 steel at the moderate scale, but the emissions would raise by up to over sixfold at the aggressive scale. Furthermore, H2-DRI fueled by solar and wind energy exhibits poorer economic and water usage performance at the aggressive scale. We highlight the necessity of avoiding excessive H2-DRI deployment and recommend prioritizing its implementation in steel units located in regions with abundant solar and wind sources nearby. This study reveals that over half of China’s steel units lack sufficient renewable energy for hydrogen-based direct reduced iron technology. Aggressive deployment would increase carbon emissions, economic costs, and water usage in the steel sector.

1 month ago | concrete.org | Xudong Chen |CHEN CHEN |Tao Ji |Chaoguo Wu

Title: Influence of Different Factors on Thermal Behavior of Permeable Concrete Pavement (Prepublished) Author(s): Publication: Materials Journal Volume: Issue: Appears on pages(s): Keywords: evaporative cooling; indoor simulation experiments; pavement temperature; permeable concrete pavement; thermal behaviors DOI: 10.14359/51746812 Date: Abstract:

2 months ago | today.line.me | Li Binian |Chang Yuan |Guan Jianwu |Feng Yasong |Ceng Yan |CHEN CHEN | +3 more

* This year marks the 75th anniversary of China-Vietnam diplomatic ties, a milestone in the two nations' profound traditional friendship featuring "camaraderie plus brotherhood."* China and Vietnam, Xi said, should give full play to their geographical advantages of being connected by land and sea, strengthen the alignment of development strategies and tap the potential of industrial cooperation.

Mar 28, 2025 | mdpi.com | Lijuan Cai |CHEN CHEN |Bingqing Wang |Guoao Xie

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