N2 Removal
Hawk Energy offers small skid mounted NRU (Nitrogen Rejection Units). Additionally, our team design customized skid mounted systems often referred as “Plug and Play” systems for N2 Removal. The beauty of these units lies in their portability, which means they can be shifted to new locations after the abandonment of the field. From the desert to the snow, and for projects of all scales—small, medium, or large—in fact, our professionals develop reliable and cost-effective engineering solutions that perform well under all conditions. Furthermore, we provide NRUs utilizing our proprietary “Pressure Swing Adsorption” technology with a specialized adsorbent design.
Understanding the Need for N2 Removal:
The market recognizes the need for N2 removal knowing the Nitrogen decreases the heating value of Natural Gas. Typically, all pipeline specifications do not allow for more than 3-4% Nitrogen in the natural gas to avoid transport and storage problems. Consequently, it is crucial to remove Nitrogen from the natural gas streams to improve gas quality and sales.
How Our NRUs Work for N2 Removal:
In our process, nitrogen is selectively adsorbed and removed from the feed gas as it passes through a fixed bed of sorbent. The adsorption occurs at the feed gas inlet pressure, and the upgraded product gas returns to the customer with only a slight pressure drop across the sorbent bed. Before this happens, we switch the feed gas to a fresh sorbent bed to ensure a constant flow of feed and product gas to and from the system. The product gas exits through the product gas accumulator, which provides surge capacity to ensure smooth, steady-state product gas flow without significant pressure or flow fluctuations.
Moreover, our integrated control system (PLC) automatically manages the vessel cycle sequence. Gas flows through the system via a series of pneumatically actuated valves, and each cycle step is based on time. Therefore, we assign each step a predetermined duration to optimize performance.
ADVANTAGES:
Selectively removes Nitrogen through proprietary PSA technology
Compatible with almost any ratio of nitrogen and methane
Very high recovery rates for Hydrocarbon (>95% methane)
Skid mounted systems – Robust and Scalable
Proprietary technology offers flexibility; stage wise design
Minimal greenhouse gas emissions