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Frontiers in Energy

ISSN 2095-1701

ISSN 2095-1698(Online)

CN 11-6017/TK

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2018 Impact Factor: 1.701

Front. Energy    2023, Vol. 17 Issue (3) : 412-427    https://doi.org/10.1007/s11708-023-0879-3
RESEARCH ARTICLE
Lifecycle carbon footprint and cost assessment for coal-to-liquid coupled with carbon capture, storage, and utilization technology in China
Jingjing XIE1, Kai LI1, Jingli FAN2(), Xueting PENG3, Jia LI4, Yujiao XIAN5()
1. Centre for Sustainable Development and Energy Policy Research, School of Energy and Mining Engineering, China University of Mining and Technology, Beijing 100083, China
2. Centre for Sustainable Development and Energy Policy Research, School of Energy and Mining Engineering; State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Beijing 100083, China
3. The Administrative Centre for China’s Agenda 21, Ministry of Science and Technology, Beijing 100038, China
4. The Hong Kong University of Science and Technology (Guangzhou), Carbon Neutrality and Climate Change Thrust, Guangzhou 511400, China; Jiangmen Laboratory of Carbon Science and Technology, The Hong Kong University of Science and Technology, Jiangmen 529199, China
5. Centre for Sustainable Development and Energy Policy Research, School of Energy and Mining Engineering; State Key Laboratory of Coal Resources and Safe Mining; School of Management, China University of Mining and Technology, Beijing 100083, China
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Abstract

The coal-to-liquid coupled with carbon capture, utilization, and storage technology has the potential to reduce CO2 emissions, but its carbon footprint and cost assessment are still insufficient. In this paper, coal mining to oil production is taken as a life cycle to evaluate the carbon footprint and levelized costs of direct-coal-to-liquid and indirect-coal-to-liquid coupled with the carbon capture utilization and storage technology under three scenarios: non capture, process capture, process and public capture throughout the life cycle. The results show that, first, the coupling carbon capture utilization and storage technology can reduce CO2 footprint by 28%–57% from 5.91 t CO2/t·oil of direct-coal-to-liquid and 24%–49% from 7.10 t CO2/t·oil of indirect-coal-to-liquid. Next, the levelized cost of direct-coal-to-liquid is 648–1027 $/t of oil, whereas that of indirect-coal-to-liquid is 653–1065 $/t of oil. When coupled with the carbon capture utilization and storage technology, the levelized cost of direct-coal-to-liquid is 285–1364 $/t of oil, compared to 1101–9793 $/t of oil for indirect-coal-to-liquid. Finally, sensitivity analysis shows that CO2 transportation distance has the greatest impact on carbon footprint, while coal price and initial investment cost significantly affect the levelized cost of coal-to-liquid.

Keywords coal-to-liquid      carbon capture      utilization and storage (CCUS)      carbon footprint      levelized cost of liquid      lifecycle assessment     
Corresponding Author(s): Jingli FAN,Yujiao XIAN   
Online First Date: 14 July 2023    Issue Date: 09 August 2023
 Cite this article:   
Jingjing XIE,Kai LI,Jingli FAN, et al. Lifecycle carbon footprint and cost assessment for coal-to-liquid coupled with carbon capture, storage, and utilization technology in China[J]. Front. Energy, 2023, 17(3): 412-427.
 URL:  
https://academic.hep.com.cn/fie/EN/10.1007/s11708-023-0879-3
https://academic.hep.com.cn/fie/EN/Y2023/V17/I3/412
Fig.1  Study boundary of DCL.
Fig.2  Study boundary of ICL.
ParametersParameter descriptionValueUnitData source
RrPercentage of railway transportation of coal70.1%Refs. [17,23,24]
RsPercentage of waterway transportation of coal11.75%Refs. [17,23,24]
RhPercentage of highway transportation of coal18.15%Refs. [17,23,24]
DrAverage transportation distance of coal by railway696.27kmRef. [25]
DsAverage transportation distance of coal by waterway1402.69kmRef. [25]
DhAverage transportation distance of coal by highway176.52kmRef. [25]
ErCarbon emission factor of railway transportation101.78kg/(104 t·km)Ref. [26]
EsCarbon emission factor of highway transportation1406.16kg/(104 t·km)Ref. [27]
EhCarbon emission factor of waterway transportation58.92kg/(104 t·km)Ref. [28]
Tab.1  Main parameters of carbon footprint assessment of coal transportation
DCL
Carbon input/(104 t·a–1)Carbon output/(104 t·a–1)
Coal for liquefactionCoal for gasificationThermal power coalTotalLiquid gasNaphthaDiesel oilCoarse powderLiquefied oil residueGasification ashThermoelectric ashGasification methanol washing tail gasGasification filter exhaustFlue gas and flare of various industrial furnacesThermoelectric flue gasTotal
150.389.370.43108.322.364.50.345.20.80.580.71.116.369.9310
ICL
Carbon input/(104 t·a–1)Carbon output/(104 t·a–1)
Raw coalFuel coalTotalLight dieselNaphthaDissolved gasBy-productProcess high concentration and unit tail gas CO2Coal gasification ashFlue gas from coal-fired boilerWish coal boiler ashTotal
890.49197.311087.8239.673.0327.777.6538.43.95191.55.81087.8
Tab.2  Carbon balance sheet
ParametersParameter descriptionValueUnitData source
Ecc1ccsEnergy consumption of per unit CO2 of process capture220kWh/tRefs. [20,31]
Ecc2ccsEnergy consumption of per unit CO2 of public capture720kWh/tRefs. [20,31]
EctccsCO2 energy consumption of per unit transportation1.3kWh/(t?km)Ref. [32]
EcsEccsOilfield CO2 storage energy consumption15.6kWh/tRef. [16]
EcsccsBrackish water layer CO2 sequestration energy consumption12kWh/tRef. [32]
Tab.3  Main parameters of carbon footprint assessment for the CCUS technology
ParametersDescriptionValue /($?(104 t?km)?1)Data source
CrUnit transportation cost by railway13.46Ref. [35]
CsUnit transportation cost by waterway31.22Ref. [36]
ChUnit transportation cost by highway460.89Ref. [37]
Tab.4  Unit transportation cost of coal
ParametersParameter descriptionNumerical valueUnitData source
CAPEXDCLDCL unit initial investment cost2149.04$/tRef. [3]
CAPDCLSize of DCL16.06104 t/aRef. [3]
OMDCLDCL operation and maintenance costs3%CAP$/tRef. [47]
CAPEXICLICL unit initial investment cost2007.11$/tRef. [13]
CAPICLSize of ICL400104 t/aRef. [13]
OMICLICL operation and maintenance costs3%CAP$/tRef. [36]
TProject operation period20aAssumed in this paper
nProject load90%Ref. [16]
rDiscount rate0.08Ref. [11]
Tab.5  Cost parameters of CTL projects
FeedstocksNumerical value/kgUnit price/($?t?1)
DCL feedstocksCoal for liquefaction2018.1968.39/111.13/153.88
Coal for gasification1198.6765.42/106.30/147.19
Coal for cogeneration1460.7359.47/96.64/133.81
Sulfur1.0429.73
Carbon disulfide1.03780.54
Liquid ammonia0.36408.86
Ferrous sulfate335.9132.71
Steam, water2536.020.30
ICL feedstocksCoal for gasification4074.465.41/106.30/147.19
Coal for cogeneration1059.5859.47/96.64/133.81
Steam, water1314.690.30
Desalinated water589.7110.11
Lime2.65104.07
Tab.6  Feedstock consumption of CTL
ParametersDescriptionDataUnitData source
CwCapture cost of process emission source18.58$/tRef. [51]
CbCapture cost of Boiler emission source51.30$/tRef. [46]
CTTransportation cost0.15$/(t?km)Ref. [46]
CDSFDSF cost8.92$/tRef. [46]
CEOREOR cost11.15$/tRef. [52]
PCO2Carbon price6.68$/tNational average carbon price
eOil change rate0.04t oil/t CO2Ref. [53]
Poil Oil price459.51$/tRef. [44]
Tab.7  CCUS-related cost parameters
Capture scenariosTypeCapture unitConcentration of CO2/%Capture rate
Foundation (S1)DCLNone
ICLNone
Process capture (S2)DCLLow temperature methanol washing87.690
ICLLow temperature methanol washing> 9890
F-T synthesis9090
Coal gasification pulverized coal bunker9990
Sulfur recovery4090
Full capture (S3)DCLLow temperature methanol washing87.690
Coal-fired boilers15.190
ICLLow temperature methanol washing> 9890
Coal gasification pulverized coal bunker9990
F-T synthesis9090
Sulfur recovery4090
Coal-fired boilers990
Tab.8  CO2 capture by coal-to-liquid coupled CCUS technology
Fig.3  (a) Carbon footprint and (b) cost of DCL and ICL (Trans representing the cost of coal transportation, CAP representing initial investment cost, OPEX representing operation and maintenance costs, Fuel representing raw material cost, CCUS representing CCUS cost, and Income representing carbon market revenue or oil displacement revenue).
Fig.4  Carbon footprint of DCL coupled CCUS under (a) S2 and (b) S3 scenarios (M&W representing coal mining and washing process emissions, Trans representing the coal transportation process emissions, and CTL representing coal to oil process emissions).
Fig.5  LCOL of DCL in different conditions (unit: $/t of oil; L/M/H respectively representing the low/middle/high price of coal, and D1/D2/D3 respectively representing the CO2 transportation distance of 0/100/250 km).
Fig.6  Cost components of DCL (Trans representing the cost of coal transportation, CAP representing initial investment cost, OPEX representing operation and maintenance costs, Fuel representing raw material cost, CCUS representing CCUS cost, and Income representing carbon market revenue or oil displacement revenue).
Fig.7  Carbon footprint of ICL coupled CCUS under (a) S2 and (b) S3 scenarios.
Fig.8  LCOL of ICL in different conditions (unit: $/t of oil; L/M/H respectively representing the low/middle/high price of coal, and D1/D2/D3 respectively representing the CO2 transportation distance of 0/100/250 km).
Fig.9  Cost components of ICL (Trans represents the cost of coal transportation, CAP represents initial investment cost, OPEX represents operation and maintenance costs, Fuel represents raw material cost, CCUS represents CCUS cost, Income represents carbon market revenue or oil displacement revenue).
Fig.10  Sensitivity of carbon footprint to CO2 transportation distance of CTL.
Fig.11  Sensitivity of LCOL to various factors under the S2 scenario.
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