can make such adjustments depending on the product slate and target specifications in fig2 natural gas stream 1 is fed with steam and oxygen stream 2 to reformer 19 the reformer is preferably an autothermal reformer synthesis gas stream 3 comprising carbon monoxide and hydrogen exits the reformer the synthesis gas typically has a h 2 co ratio of 2 2 to 2 6 the synthesis gas stream is separated into a hydrogen rich stream and a ratio adjusted stream in hydrogen membrane 20 the ratio adjusted stream 4 has a preferred ratio of about 2 1 this ratio may be further adjusted within the fischer tropsch unit 21 depending on the reactor configuration the fischer tropsch unit 21 contains one or more fischer tropsch reactors configured in parallel and or series with or without recycle to achieve the desired targets for conversion and selectivity the reactors may be fixed bed fluidized bed ebulating bed microchannel or slurry bubble column reactors any reactor known to one skilled in the art may be used the reactors may be configured in a manner desirable to achieve the objective of converting synthesis gas to hydrocarbon products the h 2 co ratio may be adjusted within the fischer tropsch block to enhance performance such as hydrocarbon selectivity products from the fischer tropsch reactor may be separated a number of different ways the figure describes three product streams a light gaseous stream 17.