New ammonia leakage monitor system developed

Scientists have developed a full-set wireless self-powered ammonia leakage monitor system for ammonia-energy ships that will ensure that there is no contact required to get real-time and accurate ammonia measurements in the shipping industry.

Due to its zero carbon, safe storage, and high energy density, liquid ammonia is a promising marine fuel in shipping industry. However, ammonia is a common toxic gas that can cause irritation to the mucous membranes and respiratory system. Therefore, it’s necessary to develop a real-time and accurate ammonia monitoring method for long-distance sea voyages.

The system includes a honeycomb triboelectric nanogenerator (TENG)-based power generation system, a carbon nanotube doped polypyrrole (CNTs-PPy)-based ammonia detection system, and a signal collecting and transmitting system (bluetooth). This study was published in Nano Energy on April 11.

The researchers improved the electronic conduction efficiency via the synergistic effect between the carbon nanotubes and conductive polymers, which enhanced the sensing performance at room temperature. The sensor exhibited good performance with a low detection limit, short response time (about 90 s), high selectivity, good stability, and low cost.

Moreover, attributed to the bluetooth, the researchers realized wireless transmission from the detection module to the computer terminal.

By combining with the honeycomb structure TENG provided by Dalian Maritime University, the system could collect and covert the mechanical energy generated by the vibration of the ship’s engine into electrical energy, realizing self-driving of the entire sensing system.

Furthermore, the researchers tested the system on the expedition ship. The entire sensing system worked smoothly in the low-level cabin of the ship with high temperature and high humidity, confirming its potential in practical applications.

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