Sulfur release and migration characteristics in chemical looping combustion of high-sulfur coal

Luo，Ming1; Qin，Yanjun1; Cai，Jianjun2; Qian，Lili1; Wang，Shuxiang3; Zhang，Haiyan1; Zhou，Lunzheng1; Liu，Peng4

2021-07-01

10.1016/j.psep.2021.05.004

PROCESS SAFETY AND ENVIRONMENTAL PROTECTION   影响因子和分区

0957-5820

Chemical looping combustion of coal has attracted great attention due to its advantage in carbon capture. Sulfur in coal may have negative impacts on this process including deteriorating the reactivity of oxygen carrier and generating gaseous sulfur species. In this research, the release and migration characteristics of sulfur in the chemical looping combustion of Xinzhou coal with two synthetic oxygen carriers, CuO/SiO and NiO/AlO, were investigated by experiments and thermodynamic simulation. The thermodynamic analysis showed that sulfur in coal mainly migrated to metal sulfides at lower temperatures and peroxide coefficients, but the formation of SO was favored at higher temperatures and peroxide coefficients. Experimental results showed that the sulfur conversion efficiencies (X) during the reduction stage reached 62.34 % and 61.25 % under Cu- and Ni-based oxygen carriers, respectively, and X during the reoxidation stage were 6.25 % and 7.44 %, respectively. For both oxygen carriers, the share of HS and SO in the sulfurous gases exceeded 96 % during the reduction stage, while SO was the only sulfurous gas when air was introduced. Even though the metal sulfides (CuS, NiS and NiS) were observed in the reduced samples, those two oxygen carriers showed satisfactory regeneration performance after one redox process.

Chemical looping combustion CO2 capture Coal Oxygen carrier Sulfur

SCI ; EI

英语

其他

WOS:000663637600001

20212010351492

Coal ; Copper oxides ; Hydrogen sulfide ; Nickel oxide ; Nickel sulfates ; Oxidation ; Oxygen ; Peroxides ; Sulfide minerals ; Sulfur ; Sulfur dioxide ; Thermoanalysis

Minerals:482.2 ; Solid Fuels:524 ; Chemistry:801 ; Chemical Reactions:802.2 ; Chemical Products Generally:804 ; Inorganic Compounds:804.2

ENVIRONMENT/ECOLOGY

2-s2.0-85105565554

Scopus

1.School of Energy and Power Engineering,Jiangsu University,Zhenjiang,212013,China
2.School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
3.Guangzhou Maritime University,Guangzhou,510725,China
4.Shandong Province Special Equipment Inspection Institute Liaocheng Branch,Liaocheng,252000,China

Luo，Ming,Qin，Yanjun,Cai，Jianjun,et al. Sulfur release and migration characteristics in chemical looping combustion of high-sulfur coal[J]. PROCESS SAFETY AND ENVIRONMENTAL PROTECTION,2021,151:1-9.

Luo，Ming.,Qin，Yanjun.,Cai，Jianjun.,Qian，Lili.,Wang，Shuxiang.,...&Liu，Peng.(2021).Sulfur release and migration characteristics in chemical looping combustion of high-sulfur coal.PROCESS SAFETY AND ENVIRONMENTAL PROTECTION,151,1-9.

Luo，Ming,et al."Sulfur release and migration characteristics in chemical looping combustion of high-sulfur coal".PROCESS SAFETY AND ENVIRONMENTAL PROTECTION 151(2021):1-9.