The burning of hydrocarbon fuels releases greenhouse gases (GHGs) that are linked to climate change and pose a health risk to people. To offset the marine industry's transition to renewable energy fuel, reduced emissions are going to be required (IMO, “Greenhouse Gas Emissions. Retrieved from IMO”, 2018). LNG fossil gas was seen as the most environmentally friendly option due to its lower carbon emissions compared to other fuels. The increasing cost and demand for LNG have facilitated the exploration of inland gas deposits (GIIGNL, “RETAIL LNG HANDBOOK”, 2015). However, most gas reservoirs are situated in offshore areas, which encourages the growing number of FLNG, which stands for Floating Liquefied Natural Gas, widely recognised and utilized in both nearshore and offshore. The initial phase of the clean energy trial initiative for FLNG involves meeting the power generation needs aboard through the utilization of clean energy sources. Adopting a clean energy mindset is crucial for maximizing the sustainable use of hydrocarbon fuel. The main reason for choosing hydrogens is preferred over other energy sources is because it has a better energy-to-mass ratio (H/C ratio). The preferred method for hydrogen production is the methane reforming process, which is highly efficient in generating large quantities of hydrogen. The reforming method is determined by the choice of either steam or oxygen as the reactant for natural gas. This choice leads to three possible processes: steam methane reforming (SMR), partial oxidation (POX), or autothermal reforming (ATR) (Alicia Boyano in Steam Methane Reforming System for Hydrogen Production, 2012). Moreover, restricted space availability which design SMR or ATR will be implemented to enhance the small-scale plant with CCS as an onboard FLNG. In conjunction with CCS (Carbon Capturing System), research on the integration of extra Clean Conversion modules to produce green hydrogen fuel is presented in this study. The goal is to help provide clean fuel for FLNG's power generation, which has been engineered for offshore conditions and emits no carbon.