2022 Spring Meeting and 18th Global Congress on Process Safety Proceedings

(71b) A New Conceptual Design on Natural Gas Comprehensive Utilization for Simultaneous Power, Ammonia, Fertilizer, and LNG Productions with Inherent Carbon Capture

Authors

Ying Liu - Presenter, Lamar University
Qiang Xu, Lamar University
Natural gas is the one of the most promising large-scale alternative energy/material resources in the world, which needs to be comprehensively utilized to satisfy the increasing demand on global energy/fertilizer consumptions with carbon sequestrations. This paper, based on our previous work [1, 2], has developed a novel conceptual design of an industrial complex to simultaneously generate power, ammonia, nitrogen fertilizer, and LNG; meanwhile, with its inherent carbon capture process to produce the pipeline-grade CO2 product for many potential uses. It employs natural gas and air as the major feeds, and retrofit five industrial process sub systems including (i) an air separation unit (ASU); (ii) an Allam-cycle power plant (ACPP); (iii) an ammonia plant (AP); (iv) a urea fertilizer plant (UFP), and (v) an LNG plant (LNGP). Through optimally integrating energy/material streams among five subsystems, this new complex can simultaneously produce electricity, ammonia, urea, LNG, pure N2, and pipeline-ready CO2 products efficiently and effectively with the eco-friendly manufacturing ways that would prevent CO2 and NOx emissions. The newly developed complex has been modeled and examined through a commercial simulator, and its exciting economic and environmental performances have also been evaluated and demonstrated. The study has a great industrial potential with salient economic, environmental, and societal benefits, which could be further optimized in the future with possible interested industrial partners.

Keywords: Allam-cycle power plant; urea fertilizer plant; LNG plant; inherent carbon capture; process modeling

Reference:

  1. Fernandes, D.; Wang, S.; Xu, Q.; Buss, R.; Chen, D. Process and carbon footprint analyses of the Allam cycle power plant integrated with an air separation unit. Clean Technologies, 1, 325-340, 2019a.
  2. Fernandes, D.; Wang, S.; Xu, Q.; Chen, D. Dynamic simulations of the Allam cycle power plant integrated with an air separation unit. International Journal of Chemical Engineering, 1-10, 2019b.