The process of preparing, purifying, concentrating and desalinating carbon nanomaterials for hydrogen energy is a complex and meticulous procedure. Through the steps of preparation, purification, concentration and desalination, high-purity and high-performance carbon nanomaterials for hydrogen energy can be produced, providing strong support for the development of hydrogen energy. 

Purification purpose: Since the prepared carbon nanotube samples often contain a large amount of impurities, such as carbon impurities and metal impurities, purification is necessary to enhance their purity and performance. 

Concentration method: 

The nano-carbon solution was repeatedly concentrated using ceramic membranes to increase the content of nano-carbon, thereby forming a concentrated nano-carbon solution. 

During the concentration process, cellulose ether or ammonium bicarbonate can be added to cause the negatively charged nanocarbons in the solution to form a complex precipitate, which is convenient for subsequent separation. 

Key features: The concentration process is simple in operation, environmentally friendly, and low in energy consumption, making it suitable for large-scale industrial production. 

Notes:

During the desalination process, an appropriate desalination method should be selected based on specific circumstances, and the processing time and temperature should be controlled to avoid damaging the carbon nanotubes. 

For many years, Wuhan Bona has been dedicated to the development of application processes for membrane separation technology. By integrating processes, membranes and equipment, it has accumulated rich experience in product purification and engineering-scale expansion. This has not only solved manufacturing challenges but also improved product quality, and together with customers, it has enhanced the technical level of the industry.