The Sulaway® system is designed to upgrade large-scale amounts of Renewable Natural Gas (RNG). And for smaller capacities, Gazpack introduced the Sulabead® 200 system.

The Sulabead® 200 system is based on a cluster principle, meaning that several smaller units are placed at various locations collecting the RNG onsite. Once the Sulabead® tower is saturated, the tower is collected and transported to a central location where a Sulaway® package is situated to allow the RNG to be processed further. (see diagram 1)

The Sulabead® 200 system consists of one water separator, one compressor/dryer set and two Sulabead® filter towers, all of which are stored in one compact storage system. All of the Sulabead® stations are equipped with a gas leak alarm.

Process cycle

The diagram to outlines the four steps the system follows, the four steps are as follows:

• Step 1: The concept behind the Sulabead® 200 process is to be able to provide smaller, more compact and affordable Sulabead® units to individual locations, allowing their renewable natural gas (RNG) to be collected and partially processed.
• Step 2: Once the Sulabead® filter tower is fully saturated, it is transported to a central collection point.
• Step 3: At the central location point there’s one Sulaway® Package. Here the saturated towers are regenerated.
• Step 4: Once the towers are regenerated, they are transported back on site where the towers are then re-integrated back into the system.

At any given time, only one Sulabead® 200 filter tower will be in operation, actively monitored by an H2S sniffer. The other will be on stand-by mode. When the level of H2S collected reaches the pre-set amount an alarm will be triggered sending a message to the controller. The system will then automatically switch over to the second (stand-by) tower. A signal will also be sent to our head office, notifying us that the saturated tower is ready for regeneration and collection will be arranged.