Combined flue gas cleanup process for simultaneous removal of SO_x, NO_x, and CO₂ -- A techno-economic analysis

Author

Amit Narendrasing Hajari

Keywords and Phrases

Pressure Swing Adsorption; Single Step Flue Gas Cleanup Process; TECHNO-ECONOMIC ANALYSIS

Abstract

"Flue gas cleanup often requires the removal of SO_x, NO_x and CO₂ in separate units before atmospheric emission. The step-wise treatment process currently in place incurs significant cost and energy penalty. A single-step adsorption process based on pressure swing adsorption (PSA) by which these impurities are removed is envisioned as an efficient means of flue gas cleanup that can be applied relatively easily. In this study, the technological and economic feasibility of a single-step separation process in which SO_x, NO_x and CO₂ are simultaneously removed from flue gas streams are assessed. Capital and operating costs are estimated based on sizing the equipment items and utilities needed and the potentials for increased energy efficiency are determined in relation to the required PSA performance. The energy saving potential for the adoption of 2-bed and 4-bed PSA cycle is compared to conventional FGD, SCR and CO₂ capture units needed to cleanup flue gas in a step-wise fashion. The results show that energy savings can be expected when the PSA removal efficiency is greater than 90%. In the case of a 550 MW coal-fired power plant, the energy savings can be as high as 30% depending on PSA removal efficiency and cycle time. This high value can be reached when the PSA cycle time is on the order of 2 min. Overall, the PSA process is expected to lower the cleanup costs for both retrofitted and new-build power plants. This techno-economic assessment shows that the integrated single-step system can be an attractive technology when compared to multi-step systems for the removal of flue gas impurities"--Abstract, page iii.

Advisor(s)

Rezaei, Fateme

Committee Member(s)

Rownaghi, Ali
Morrison, Glenn

Department(s)

Chemical and Biochemical Engineering

Degree Name

M.S. in Chemical Engineering

Publisher

Missouri University of Science and Technology

Publication Date

Spring 2017

Pagination

xiii, 52 pages

Note about bibliography

Includes bibliographical references (pages 45-51).

Rights

© 2017 Amit Harendrasing Hajari

Document Type

Thesis - Open Access

File Type

text

Language

English

Thesis Number

T 11132

Electronic OCLC #

992439985

Recommended Citation

Hajari, Amit Narendrasing, "Combined flue gas cleanup process for simultaneous removal of SO_x, NO_x, and CO₂ -- A techno-economic analysis" (2017). Masters Theses. 7645.
https://scholarsmine.mst.edu/masters_theses/7645