[ green ammonia ]
One of the key advantages of Stamicarbon ’ s nitric acid technology is its high energy efficiency : the process is designed to minimize heat losses and maximize heat recovery from the process streams . This decreases steam consumption and , hence , operational costs .
Stamicarbon ’ s technology is also designed with environmental concerns in mind . The technology incorporates measures to minimize emissions of greenhouse gases and other pollutants . The use of proprietary tertiary abatement technology allows for the elimination of nitrogen oxides and nitrous oxide , which can be reduced to almost zero , resulting in the disposal of an environmentally safe tail gas .
Integration of technologies in a green fertilizer complex
A green fertilizer complex , as shown in Figure 5 , can integrate multiple units , including a green ammonia production plant , a nitric acid plant , a urea solution plant , and an ammonium nitrate solution plant . One key advantage of integration is the reduction of CAPEX and OPEX .
For example , the oxygen stream from the water electrolysis section can be incorporated into the nitric acid plant , as illustrated in Figure 6 , reducing the need for conventional air-supplied oxygen .
To maintain safety , the ammonia-oxygen mixture must remain below the explosive limit , requiring
Fig . 5 . Integration of green ammonia and nitric acid technologies
Fig . 6 . Oxygen integration with the nitric acid technology : recirculation of tail gas to the burner
50 Hydrogen Tech World | Issue 19 | December 2024