Desulfurization and upgrade of pyrolytic oil and gas during waste tires pyrolysis: The role of metal oxides

被引:5
作者
Jiang, Hao [1 ,2 ]
Zhang, Junjie [1 ,2 ,5 ]
Shao, Jingai [1 ,2 ,5 ]
Fan, Tingting [1 ,2 ]
Li, Jianfen [3 ]
Agblevor, Foster [4 ]
Song, Hao [1 ]
Yu, Jie [1 ]
Yang, Haiping [1 ]
Chen, Hanping [1 ,2 ]
机构
[1] Huazhong Univ Sci & Technol, Sch Energy & Power Engn, State Key Lab Coal Combust, Wuhan 430074, Hubei Province, Peoples R China
[2] Huazhong Univ Sci & Technol, Sch Energy & Power Engn, Dept New Energy Sci & Engn, Wuhan 430074, Hubei Province, Peoples R China
[3] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China
[4] Utah State Univ, USTAR Bioenergy Ctr, Dept Biol Engn, Logan, UT 84341 USA
[5] 1037 Luoyu Rd, Wuhan 430074, Hubei, Peoples R China
基金
中国国家自然科学基金;
关键词
Waste tire pyrolysis; Metal oxide; Volatile desulfurization; Monoaromatic hydrocarbons; Molecular dynamics simulation; DENSITY-FUNCTIONAL THEORY; CATALYTIC PYROLYSIS; PRODUCTS DISTRIBUTION; CO-PYROLYSIS; TG-FTIR; MECHANISM; ADSORPTION; RUBBER; SIMULATIONS; ALPHA-FE2O3;
D O I
10.1016/j.wasman.2024.04.020
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Pyrolysis can effectively convert waste tires into high-value products. However, the sulfur-containing compounds in pyrolysis oil and gas would significantly reduce the environmental and economic feasibility of this technology. Here, the desulfurization and upgrade of waste tire pyrolysis oil and gas were performed by adding different metal oxides (Fe2O3, CuO, and CaO). Results showed that Fe2O3 exhibited the highest removal efficiency of 87.7 % for the sulfur-containing gas at 600 degrees C with an outstanding removal efficiency of 99.5 % for H2S. CuO and CaO were slightly inferior to Fe2O3, with desulfurization efficiencies of 75.9 % and 45.2 % in the gas when added at 5 %. Fe2O3 also demonstrated a notable efficacy in eliminating benzothiophene, the most abundant sulfur compound in pyrolysis oil, with a removal efficiency of 78.1 %. Molecular dynamics simulations and experiments showed that the desulfurization mechanism of Fe2O3 involved the bonding of Fe-S, the breakage of C-S, dehydrogenation and oxygen migration process, which promoted the conversion of Fe2O3 to FeO, FeS and Fe2(SO4)3. Meanwhile, Fe2O3 enhanced the cyclization and dehydrogenation reaction, facilitating the upgrade of oil and gas (monocyclic aromatics to 57.4 % and H2 to 22.3 %). This study may be helpful for the clean and high-value conversion of waste tires.
引用
收藏
页码:44 / 54
页数:11
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