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2021
Conference Paper
Titel
Assessment of Feasible and Effective Technologies for the Chemical Utilization of Domestic Coal for Value-Added Production in Vietnam
Abstract
Vietnam is a country rich in coal resources. Currently, coal is mainly combusted for energy production. However, there is increasing interest to generate additional value from domestic coal via chemical utilization as feedstock for production of chemicals and/or transportation fuels. This article evaluated the chemical utilization of Vietnam's coal via gasification for the production of syngas, and the subsequent synthesis of syngas via Fischer Tropsch (FT) technology for the production of FT diesel. A technology overview of coal gasification technologies provided insights into different types of gasification processes as well as a comparative evaluation of their advantages and disadvantages. Similarly, a review of FT technologies enabled a comparative technology overview of commercial FT reactors and associated processes, their advantages and disadvantages. Using a case study approach, the suitability of identified commercial gasification and FT technologies are evaluated based on their applicability for the conversion of high ash-containing Vietnamese anthracite with high melting temperature to produce FT-diesel. Evaluation results indicated that the Fixed Bed Dry Ash (FBDA) gasification technology in combination with the medium-temperature Fischer Tropsch (MTFT) synthesis would be the most advantageous technologies for the production of FT-diesel from Vietnamese anthracite. The importance of considering the gas loop and product recovery is also highlighted.