Process integration aspects of the design of a gas separation system for the upgrade of crude Synthetic Natural Gas (SNG) to grid quality in a wood to methane process

The present paper investigates the prospects of process integration of the biogenic production of crude synthetic natural gas (SNG) and its upgrade to grid quality. At the example of a separation by means of a membrane cascade, a holistic design approach targeting the overall process performances is presented. Compared to a design obtained from an isolated approach, it is shown that a considerable reduction of the size and cost of the separation system is possible if a tight process integration is considered in the system design.