| Title |
An air/metal hydride battery for simultaneous neutralization treatment of acid-base wastewater and power generation |
| ID_Doc |
10434 |
| Authors |
Ye, KQ; Du, YA; Yang, YX; Chen, R; Deng, C; Weng, GM |
| Title |
An air/metal hydride battery for simultaneous neutralization treatment of acid-base wastewater and power generation |
| Year |
2024 |
| Published |
|
| Abstract |
How to efficiently deal with waste acids and bases produced by industry has constantly been a tough question for scientists and engineers. Such acid-base wastewaters are normally treated by mixing to give neutral products (i.e., water and salts) and heat which is hard to collect and reuse. Therefore, there is a need for innovative approaches with high efficiencies and high-value added products. Here, we report an air/metal hydride battery with the function of both treating acid-base wastewaters and gathering the waste heat energy in the form of electricity. Remarkably, the proposed battery could exhibit a high coulombic efficiency of up to ca. 94%, along with an effective reduction in the acidity/alkalinity of waste acids/bases and a decent amount of electricity. The proposed battery device also demonstrates a stable operation in semi-flow mode over a two-day timescale, showcasing its potential scalability and long-term stability. Moreover, life cycle assessment results indicate that electricity retrieved from the treatment process is a key contributor to reducing environmental impacts. This work offers alternative opportunities for accelerating the transition to a waste acid-base circular economy. Here, we propose and demonstrate an air/metal hydride battery with the function of both treating acid-base wastewaters and gathering the waste heat energy in the form of electricity. |
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