The fate of mercury in fluidized beds under oxy-fuel combustion conditions

被引：18
|
作者：
de las Obras-Loscertales, M. [1 ]
Izquierdo, M. T. [1 ]
Rufas, A. [1 ]
de Diego, L. F. [1 ]
Garcia-Labiano, F. [1 ]
Abad, A. [1 ]
Gayan, P. [1 ]
Adanez, J. [1 ]
机构：
[1] Inst Carboquim ICB CSIC, Environm & Energy Dept, Zaragoza 50018, Spain
来源：
FUEL | 2016年 / 167卷
关键词：
CO2; capture; Oxy-fuel combustion; Fluidized bed; Mercury emissions; CALCIUM-BASED SORBENTS; COAL COMBUSTION; FLUE-GAS; OPERATING-CONDITIONS; OXIDATION; SYSTEMS; TRANSFORMATIONS; MECHANISMS; SPECIATION; EMISSIONS;
D O I：
10.1016/j.fuel.2015.11.045
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Among the different pollutant gases released from oxy-coal combustion, mercury is the responsible for important operational issues in the CO2 processing unit, being able to cause material corrosion. Some studies concerning the fate of mercury during oxy-coal combustion are referred to pulverized coal (PC) boilers. However, the fate of mercury emissions in fluidized bed (FB) combustors has yet to be elucidated. In this work, mercury emissions from a 3 kWth bubbling FB combustor operating under oxy-fuel combustion conditions have been evaluated. For this purpose, two Spanish Ca-based sorbents and two Spanish coals were used. The effects of type of Ca-based sorbent, the Ca/S molar ratio, temperature and recycled gases (NO, SO2 and H2O) typical in oxy-fuel combustion process on the distribution of mercury species have been analyzed. It was observed that the presence of Ca-based sorbents in the combustor favored mercury fixation as particle-bound mercury which exhibited a maximum at a temperature about 925 degrees C corresponding to the highest degree of limestone sulfation. SO2 recirculation inhibited the Hg-0 oxidation and thus the mercury fixation as particle-bound mercury decreased. However, neither NO nor steam recirculation affected mercury speciation. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：75 / 81
页数：7
相关论文
共 50 条
  • [21] Calcium looping performance under extreme oxy-fuel combustion conditions in the calciner
    Arias, B.
    Diego, M. E.
    Mendez, A.
    Alonso, M.
    Abanades, J. C.
    [J]. FUEL, 2018, 222 : 711 - 717
  • [22] Reactivity and Kinetic Analysis of Coal Chars Combustion under Oxy-fuel Conditions
    Fei, Hua
    Li, Pei-Sheng
    Li, Yuan-Lin
    Deng, Jian-Hong
    [J]. PROCEEDINGS OF THE 2ND ANNUAL INTERNATIONAL CONFERENCE ON ADVANCED MATERIAL ENGINEERING (AME 2016), 2016, 85 : 968 - 973
  • [23] Morphological analysis of sulfated Ca-based sorbents under conditions corresponding to oxy-fuel fluidized bed combustion
    de las Obras-Loscertales, M.
    Rufas, A.
    de Diego, L. F.
    Garcia-Labiano, F.
    Gayan, P.
    Abad, A.
    Adanez, J.
    [J]. FUEL, 2015, 162 : 264 - 270
  • [24] COMBUSTION CHARACTERISTICS OF BIOMASS ASH AND LIGNITE BLEND UNDER OXY-FUEL CONDITIONS
    Atibeh, Ehsan Abbasi
    Yozgatligil, Ahmet
    [J]. PROCEEDINGS OF THE ASME INTERNATIONAL MECHANICAL ENGINEERING CONGRESS AND EXPOSITION, 2013, VOL 6A, 2014,
  • [25] Global Combustion Mechanisms for Use in CFD Modeling under Oxy-Fuel Conditions
    Andersen, Jimmy
    Rasmussen, Christian Lund
    Giselsson, Trine
    Glarborg, Peter
    [J]. ENERGY & FUELS, 2009, 23 (3-4) : 1379 - 1389
  • [26] Fundamental study of heterogeneous KCl sulfation under oxy-fuel combustion conditions
    Liu, Dianbin
    Li, Wei
    Li, Shiyuan
    [J]. INTERNATIONAL JOURNAL OF ENERGY RESEARCH, 2019, 43 (09) : 4093 - 4103
  • [27] Pressurized oxy-fuel combustion of a char particle in the fluidized bed combustor
    Li, Lin
    Duan, Lunbo
    Yang, Zhihao
    Sun, Zhenkun
    Zhao, Changsui
    [J]. PROCEEDINGS OF THE COMBUSTION INSTITUTE, 2021, 38 (04) : 5485 - 5492
  • [28] A Review on the Progress of Oxy-fuel Combustion Technology in Circulating Fluidized Bed
    Ge, Chen
    Wang, Chuanhao
    Li, Shiyuan
    [J]. Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics, 2023, 44 (03): : 840 - 849
  • [29] Performance Evaluation of South African Coals under Oxy-Fuel Combustion in a Fluidized Bed Reactor
    Mathekga, H. I.
    Oboirien, B. O.
    Engelbrecht, A.
    North, B. C.
    Premlal, K.
    [J]. ENERGY & FUELS, 2016, 30 (08) : 6756 - 6763
  • [30] Ash characterisation formed under different oxy-fuel circulating fluidized bed conditions
    Baqain, Mais
    Yoruk, Can Rustu
    Nesumajev, Dmitri
    Jarvik, Oliver
    Konist, Alar
    [J]. FUEL, 2023, 338
12345