Optimization of Procurement and Production Planning Model in Refinery Processes Considering Corrosion Effect

Abstract

This study focused on finding optimal procurement and production planning including corrosion effect. We developed the corrosion forecasting and cost model, which are combined in the procurement and production planning model. The corrosion cost model was presented to calculate cost depending on corrosion rate estimated by corrosion factors, which are H+, Cl–, H2S, and CO2. This study found the optimal results such as the optimal amount of crude to be purchased and optimal design. Several case studies are also included in this study to analyze and improve the optimization production planning model of petrochemical and refinery processes. Although the government regulation requires the operating cycle time as 4 years, this study reveals that the profit per day is increasing up to 5 years if the corrosion is considered. This result increases the net profit per day about 4.14% in a crude distillation unit (CDU) process with 120 000 barrels per day capacity.

Physical and rheological properties of deasphalted oil produced from solvent deasphalting

“…Because API gravity is related to the inverse of relative density, API gravity increases with decreasing specific gravity and has been widely used in the petroleum industry to establish the quality and properties of oils [25,26]. In general, crude oil with an API gravity of less than 20-22°is defined as heavy oil, while that with an API gravity of less than 10°is classified as extra heavy oil [27,28].…”

Development and application of machine learning‐based prediction model for distillation column

“…2 In general, optimization is performed for the energy consumption of the process operation or for its cost, by additionally performing economic evaluation. 3,4 For energy optimization of the distillation process, a simulation program based on theory is generally used. For example, Huidong et al developed a vacuum distillation process to improve the separation sequence of acetone-butanol-ethanol, and they confirmed via simulation that the energy used could be efficiently reduced.…”

“…The energy consumed in the distillation process is mainly exploited for reboiler and condenser operations; furthermore, there is a need to optimize the operating conditions to reduce energy by interacting with the operating conditions, such as the pressure and temperature of the distillation column 2 . In general, optimization is performed for the energy consumption of the process operation or for its cost, by additionally performing economic evaluation 3,4 . For energy optimization of the distillation process, a simulation program based on theory is generally used.…”

Techno‐economic comparison of amine regeneration process with heat‐stable amine salt reclaiming units

“…11 The HSAS includes formate (CHOO − ), acetate (CH 3 COO − ), and thiocyanate (SCN − ), which corrode the device and reduce efficiency because they are deposited inside the heat exchanger. 12,13 Further, HSAS reacts with amines, thereby reducing the amount of available amines and the efficiency of the desulfurization process. 14 Unlike H 2 S, the HSAS has a relatively large pKa with amines; therefore, it is not degraded at the high temperature of the regenerator and needs to be removed through additional processes.…”