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Energy Optimization via Process Modification To Maximize Economic Feasibility of the Butane Gas-Splitting Process

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journal contribution
posted on 15.09.2020 by Yeongryeol Choi, Nahyeon An, Il Moon, Junghwan Kim
Gas splitting is an energy-intensive process that is widely used in the chemical industry. Consequently, the cost effectiveness of this process can be maximized through energy optimization. This study focuses on the energy optimization of the commercial mixed butane gas-splitting technique via process modification. Because the previous process is impeded by the instability of the n-butane content in the feedstock, it consumes excessive energy and results in a product that is inferior in purity. Therefore, we initially simulated the previously used process model and then modified this process to achieve the target purity of the product and minimize energy consumption. The energy optimization model was designed in accordance with the standards of the commercial-grade product. After achieving energy optimization, we conducted economic analyses for the two modified processes by considering their capital and operating costs. Each modified process exhibited an approximate reduction of 19.67−21.85% in its energy consumption; however, only one of the two modified processes managed to enhance the product yield (by 1.00%). The net present value of the previous process model was 126.98 M$, whereas those of the modified processes were calculated to be 134.71 and 133.78 M$.