Effect of different temperature using energy analysis for power to methanol production plant / Dg Ku Nornasuha Nassa Pg Osman

Methanol is one of the valuable chemical that has a high demand all over the world due to its various purposes and usage. Mostly, the large production of methanol are using natural gas as raw material. Lately, the issues of global warming has arising thus it is believed the accumulation of CO₂ (carbon dioxide) in the atmosphere is one of the factor that lead to the problem stated. Therefore, one of the way to reduce the CO₂ impact to environment is by capturing CO₂from the environment and produce a product which is methanol. As for now, there are no evaluation of energy along with high selectivity and conversion for methanol plant. Usually, the previous researcher only do a research for a higher selectivity but did not including the energy consumption for methanol plant. Therefore, in this paper, the design and simulation of methanol plant also analysation of the energy consumption using energy analysis is being conducted. There are two objective in this research. First, to design and simulate methanol power to methanol plant using different temperature in the reactor. Second, to analyse the energy consumption of methanol plant using energy analysis by manipulating temperature in the reactor. 3 condition (reactor feed) of methanol plant are simulated using aspen HYSYS V8.8 which are plant 1(442 bar, 280˚C), plant 2(76 bar, 280˚C) and plant 3 (442 bar, 210˚C). The energy is calculated by manual calculation according to standard formula of each equipment and being compared with HYSYS value. From the calculation, it is proven that plant 3 is the least energy required followed by plant 1 and plant 2. For plant 3, the overall energy required is 7,235.992kW that costs RM 256,877.716. Next, plant 2 required 38,655.44kW that costs RM 1,372,623.12 while plant 1 required 10231.1kW that costs RM 363,204.05. Therefore, plant 3 is the least energy and costs required with feed of reactor condition (442 bar, 210˚C).