Feasibility Evaluation of the Terminated Waste Energy in Situ Conversion Strategy toward Carbon Neutralization in Metallurgical Processes

Dong，Jianping1; Zhang，Huining1; Wei，Chao1; Yang，Liang1; Cao，Caifang1; Yang，Shaohua1; Zhang，Zuotai2

2021

10.1021/acssuschemeng.1c03731

ACS Sustainable Chemistry & Engineering   影响因子和分区

2168-0485

2168-0485

Integrated consideration of carbon dioxide reduction, terminated energy conversion, and resourceful disposal of wastes like plastics broadens a new horizon for green metallurgical processes. Here, a chlorine-free plastic gasification process in situ utilizing converter slag and flue gas heat was proposed as an example, and this complicated system's superiority was comprehensively evaluated in terms of syngas preparation efficiency and carbon dioxide reduction depth through thermodynamics. Specifically, the effects of process parameters such as temperature, pressure, and H2O/P, CO2/P, and SS/P ratios on both were discussed in detail; moreover, two sets of theoretical operation conditions were explored for the maximum syngas preparation efficiency or carbon dioxide reduction. Furthermore, the effects of waste plastics and the gasification agent amount on reaction system heat balance were discussed when the H2/CO ratio in syngas gas was 3:1 or 2:1 for CH4 or CH3OH preparation, respectively, for the purpose of terminated product quality regulation. The results showed that H2 and CO yields and the CO2 conversion rate increased as the temperature increased but decreased as the pressure increased, H2 yield was promoted by the H2O/P ratio instead of CO yield and the CO2 conversion rate, and the CO2/P ratio had a positive effect on CO yield but not on H2 yield and the CO2 conversion rate; CH4 and CaCO3 yields increased as the SS/P ratio increased. Meanwhile, chlorine-free plastic consumption increased as the temperature increased, and less gasification agent was needed. However, this system had the maximum syngas yield, namely, 44.82-64.13% H2 and 88.88-135.69% CO when temperature, pressure, and H2O/P, CO2/P, and SS/P ratios were 800-1000 °C, 1.0 atm, 1-2.0, 1.2-3.0, and 1.0, respectively; with respect to CO2 reduction efficiency, capacity ranging from 75.17 to 90% can be obtained when 800-1000 °C, 1.0 atm, 0-0.8, 0.4-1.2, and 1.0 were adopted. Definitely, the strategy of in situ converter slag and flue gas heat conversion utilizing chlorine-free plastics was indeed feasible for industrial application.

carbon dioxide reduction chlorine-free plastic gasification converter slag heat conversion flue gas syngas preparation

EI ; SCI

英语

其他

National Natural Science Foundation of China[52064020]

Chemistry ; Science & Technology - Other Topics ; Engineering

Chemistry, Multidisciplinary ; Green & Sustainable Science & Technology ; Engineering, Chemical

WOS:000711203000010

AMER CHEMICAL SOC

20214411099386

Calcite ; Calcium carbonate ; Chlorine ; Elastomers ; Energy conversion ; Flue gases ; Gasification ; Metallurgy ; Pollution control ; Slags ; Synthesis gas ; Temperature ; Waste disposal

Air Pollution Sources:451.1 ; Industrial Wastes Treatment and Disposal:452.4 ; Minerals:482.2 ; Energy Conversion Issues:525.5 ; Metallurgy:531.1 ; Thermodynamics:641.1 ; Chemical Operations:802.3 ; Chemical Products Generally:804 ; Inorganic Compounds:804.2 ; Elastomers:818.2

2-s2.0-85118181826

Scopus

1.Faculty of Materials,Metallurgy and Chemistry,Jiangxi University of Science and Technology,Ganzhou,341000,China
2.School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Dong，Jianping,Zhang，Huining,Wei，Chao,et al. Feasibility Evaluation of the Terminated Waste Energy in Situ Conversion Strategy toward Carbon Neutralization in Metallurgical Processes[J]. ACS Sustainable Chemistry & Engineering,2021,9(42):14079-14089.

Dong，Jianping.,Zhang，Huining.,Wei，Chao.,Yang，Liang.,Cao，Caifang.,...&Zhang，Zuotai.(2021).Feasibility Evaluation of the Terminated Waste Energy in Situ Conversion Strategy toward Carbon Neutralization in Metallurgical Processes.ACS Sustainable Chemistry & Engineering,9(42),14079-14089.

Dong，Jianping,et al."Feasibility Evaluation of the Terminated Waste Energy in Situ Conversion Strategy toward Carbon Neutralization in Metallurgical Processes".ACS Sustainable Chemistry & Engineering 9.42(2021):14079-14089.