near-zero emission thermal power plant using advanced km
TRANSCRIPT
Near-Zero Emission Thermal Power Plant
using Advanced KM CDR ProcessTM
The Kansai Electric Power Co., Inc.
Mitsubishi Heavy Industries Engineering, Ltd.
5th Post Combustion Capture Conference
September 19, 2019
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The Kansai Electric Power Co., Inc.
Outline
1. Introduction
2. Study Conditions
3. OPEX & CAPEX Analysis
4. Conclusions
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1. Introduction
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Background and Objective
Carbon dioxide Capture and Storage (CCS) is expected to be one of the
major measures contributing to carbon reduction and net near-zero
emission in the near future.
Fossil fuel power plants equipped with CCS can be considered to be zero-
carbon power generation if nearly full CO2 recovery is feasible.
Background
Objective
The objective of this presentation is to investigate the process performance
and plant economic at max. 99.5% CO2 capture ratio that has not been
studied before using KM CDR ProcessTM (Kansai Mitsubishi Carbon Dioxide
Recovery Process).
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KM CDR ProcessTM – Kansai Mitsubishi Carbon Dioxide Recovery
Flue gas
Treated gas
Reboiler
Condenser
Blower
Regenerator
CW
Quencher
CW
CO2 product
CW
Absorber
CW
Developed in early 1990s with MHI
Amine-based absorption process
Proprietary features including KS-1™ solvent
First commercial plant in 1999
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The Kansai Electric Power Co., Inc.
Advanced KM CDR ProcessTM and KS-1TM Solvent
Advanced KM CDR ProcessTM
– 30% CAPEX reduction compared to conventional KM CDR ProcessTM
– For new commercial projects after further evaluation and test
KS-1TM Solvent
– High CO2 capacity
– Low corrosiveness
– Low degradation
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2. Study Conditions
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Study Conditions
Reference plant is a coal-fired power plant in U.S. with 650 MW gross
output.
Flue gas is pre-treated by typical air purification technologies equipped with
modern coal-fired power plant (e.g., SCR, FGD, and ESP) to meet US
regulation.
Design Specifications
Flue gas rate (Nm3/hr) 1,846,500
CO2 concentration (mol%) 13.5
CO2 capacity (tonne/day) 10,572 – 11,688
CO2 product pressure (kg/cm2g) 130
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Study Scope
Power plantCO2
AbsorptionSolvent
RegenerationFlue gas
Treated flue gas
CO2 product
CO2
lean solvent
CO2
rich solvent
Stack
Flue Gas Quencher
CO2 Compression
& Dehydration
Scope of CO2 Capture and Compression
Flue Gas Quencher
CO2 Absorption Section
Solvent Regeneration Section
CO2 Compression and Dehydration Section
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Study Cases
Base case
- CO2 capture ratio: 90%
- Relative absorption packing height: 100%
Study cases
- CO2 capture ratio: 95 - 99.5%
- Relative absorption packing height: 100 - 200%
Base case Study cases
CO2 capture process Advanced KM CDR ProcessTM
Capture ratio (%) 90 95, 99 99.5
Relative absorption
packing height (% as m)100 100 100, 125, 150, 175, 200
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CO2 Partial Pressure at CO2 Absorber Top
*) Typical coal-fired flue
gas case at 1 bar with
13.5 mol% CO2
CO2 partial pressure
decreases dramatically
after 95%.
More packing height is
necessary to achieve
high CO2 capture ratio.
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Costing Method
CAPEX (Total Engineering, Procurement and Construction (EPC) Cost)
- Direct cost: Purchased equipment, Instrumentation, Electrical, Piping,
Construction material
- Indirect cost: Engineering, Construction, Transportation, License fee,
Contingency and KS-1TM initial fill cost
OPEX
- Utility: LP steam, Electricity, Cooling water makeup
- Chemical: KS-1TM makeup
Plant availability (%) 90
Electricity cost($/kWh) 0.065
Cooling water makeup cost($/m3) 0.2
Low pressure steam cost ($/tonne) 10
Capital charge factor (CCF) 0.124
Costing Parameters
𝐴𝑛𝑛𝑢𝑎𝑙𝑖𝑧𝑒𝑑 𝐶𝐴𝑃𝐸𝑋 ($
𝑡𝑜𝑛𝑛𝑒 𝐶𝑂2) =
𝑇𝑜𝑡𝑎𝑙 𝐸𝑃𝐶 𝑐𝑜𝑠𝑡 $ × 𝐶𝐶𝐹(1𝑦𝑟)
𝑎𝑛𝑛𝑢𝑎𝑙 𝐶𝑂2 𝑐𝑎𝑝𝑡𝑢𝑟𝑒𝑑 (𝑡𝑜𝑛𝑛𝑒/𝑦𝑟)
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3. OPEX & CAPEX Analysis
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OPEX & CAPEX Analysis
Total OPEX & Annualized CAPEX (scale against base value: 100)
Base
caseStudy cases
CO2 capture ratio (%) 90 95 99 99.5 99.5 99.5 99.5 99.5
Absorption
packing height
(% as m)
100 100 100 100 125 150 175 200
Total OPEX &
Annualized CAPEX
($/tonne CO2)
100.0 101.5 104.0 106.0 103.2 102.7 102.8 103.0
Minimum total cost is 150% packing height case for 99.5% capture ratio.
This case is called “Near-zero emission case” in the study.
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OPEX & CAPEX Analysis
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4. Conclusions
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Conclusions
1. Advanced KM CDR ProcessTM with KS-1TM is used to explore the near-
zero emission power generation and the feasibility of high CO2 capture
ratio at 99.5%.
2. A near-zero emission coal-fired power plant that recovers 99.5% of CO2 is
technically feasible using the Advanced KM CDR ProcessTM and KS-1TM
solvent.
3. The near-zero emission case will increase the cost of CO2 captured by
near 3% compared with base case.
Thank you.