BGL gasifier for coal-to-SNG: A comparative techno-economic analysis. (15th August 2017)

• Record Type: Journal Article
• Authors: Yang, Sheng; Qian, Yu; Ma, Donghui; Wang, Yifan; Yang, Siyu
• Is Part Of: Energy. Volume 133(2017)
• Page Start: 158
• Page End: 170
• Publication Date: 2017-08-15
• Subjects: Coal-to-SNG -- BGL gasifier -- Technical analysis -- Economic evaluation; Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Energy consumption -- Periodicals; 333.7905
• DOI: 10.1016/j.energy.2017.05.081
• Languages: English
• ISSNs: 0360-5442

Abstract

Abstract: Coal-to-SNG plays an irreplaceable and important role in the SNG industry of China. BGL gasifier is the most suitable for coal-to-SNG. In order to promote the development and improvement of SNG industry in China, it is of great significance to simulate, research and analyze the coal-to-SNG of BGL gasifier. In this paper, the whole process model of coal-to-SNG is established and the accuracy of the model was verified by comparing with the actual operating parameters, mass and energy balance data. On basis of the established model, the key parameters of the process were conducted sensitivity analysis. Based on the simulation results, the exergy analysis and economic evaluation of the process were carried out to provide theoretical support and reference for the actual production and the later process improvement. The results show that the exergy efficiency is 0.63, the total exergy loss is 2023.2 MW, and the loss of gasification unit is 1141.9 MW, which is 56.5% of the total loss. Gasification unit for the entire process of the exergy loss of the largest, should give priority to improvement. Economic evaluation: the FIRR is 6.58% at the condition of the SNG price is 1.68 CNY/Nm 3 and the coal price is 201 CNY/t. The FIRR will larger than 10% when the SNG price is larger than 1.9 CNY/Nm 3 at the condition of coal price is 201 CNY; the FIRR will larger than 10% when the coal price is lower than 100 CNY/t when the SNG price is 1.68 CNY/Nm 3 . Highlights: The coal-to-SNG is established and verified. The key parameters of the whole process were conducted sensitivity analysis. Exergy analysis is conducted and strategies for improving exergy efficiency are put forward. Economic evaluation is conducted on SNG price and coal price sensitive analysis.