INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Haifeng Li,Sheng Su,Yan Peng,Linkang Wu,Kai Xu,Lijun Liu,Mengxia Qing,Song Hu,Yi Wang,Jun Xiang
High temperature sorbents for removing H2S comprising manganese oxide and Al2O3 support modified with La loadings were prepared with wet impregnation. The removal of H2S and the regeneration of sorbents were conducted at 850 °C to investigate the effect of the support modified with La on the desulfurization ability and durability of the Mn/La/Al2O3 sorbents. The fresh sorbent, first sulfide sorbent, and fourth regenerated sorbent were characterized by nitrogen isothermal adsorption, X-ray power diffraction, scanning electron microscopy, and H2 temperature-programmed reduction. The results showed that the highest initial breakthrough sulfur capacity (BSC) was obtained with Mn/0.78%La/Al2O3(M/0.78L), and the initial BSC decreased with increased La loadings due to the inhibiting of excessive La on the reaction between MnO and H2S. The BSC of sorbents with lower La loadings suffered more serious deactivation than MnxOy/Al2O3 during successive desulfurization–regeneration cycles, and the BSC durability of sorbents increased with an increase in La loadings and calcination temperature of La/Al2O3. Mn/4.83%La/Al2O3 with La/Al2O3 calcined at 900 °C (M/4.83H) had the best BSC durability, which was better than the BSC durability of MnxOy/Al2O3 (M) during several desulfurization–regeneration cycles. The characterization results showed that the structure of the M/4.83H sorbent was more stable than other sorbents. The M/4.83H sorbent derived the La(AlO3) phase, which could maintain the structural stability of the sorbent during several desulfurization–regeneration cycles. The formation of the LaAlO3 phase may inhibit MnxOy from dissolving into Al2O3, which was beneficial for the durability of sorbents during several successive desulfurization–regeneration cycles.
研究领域:
化学工程
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材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Shuwen Peng,Yuran Li,Bin Wang,Yanbin Cui,Jinglei Tian,Hongqiang Liu,Tingyu Zhu
Removal of sulfur species from blast furnace gas is urgently needed due to the strict emission limits imposed on iron-steel industrial flue gas. Improving the sulfur capacity of H 2 S is a crucial challenge to reduce the operation cost. NiFe layered double hydroxide (LDH) adsorbents were synthesized using the hydrothermal method to strengthen the adsorption of H 2 S, achieving a high sulfur capacity of 133.6 mg/g at 50 °C. Characterization studies have revealed that the reaction pathway of H 2 S on the NiFe LDH surface involves adsorption, dissociation and oxidation. It has been clarified that the high sulfur capacity can be attributed to the abundant H 2 S dissociation sites and the excellent O 2 activation sites. The dissociation sites of H 2 S encompass metal sites, -OH and CO 3 2- . The interaction between O 2 and the bridge site of asymmetric metal atoms significantly enhances the dissociation of O 2 . Strengthening the dissociation of H 2 S and O 2 improves the sulfur capacity. The deactivation of adsorbents comes from the continuous consumption of oxygen species mainly composed of -OH and the deposition of sulfur species in the smaller mesopores ranging from 2 to 10 nm. This work provides useful insights into designing highly efficient iron-based adsorbents for the desulfurization of blast furnace gas.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FUEL
·
2016
·
IF 3.611
Dongjing Liu,Weiguo Zhou,Jiang Wu
The high-temperature H 2 S removal was conducted over x La y Cu/ZSM-5 sorbents prepared via citric acid method. The sorbents showed good desulphurization performance, the maximal sulfur capacity of 2240.5 μmol S/g over 5La5Cu/ZSM-5 was achieved at 700 °C. The presence of H 2 obviously shortened the breakthrough time and reduced the sulfur capacity. However, the presence of CO had little influence on the desulphurization behavior. The sulfidation activity of La 2 O 3 can be significantly enhanced by introduction of Cu due to the intimate mixing of La 2 O 3 and CuO, the formation of La 2 CuO 4 compound.
研究领域:
材料科学
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环境化学
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能源工程
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催化化学
✓ 已验证
DOI
高影响因子
KOREAN JOURNAL OF CHEMICAL ENGINEERING
·
2022
·Vol. 39
·期 12
·3305-3314
·
IF 3.146
Liu Zhihao,Qiu Kui,Dong Yu,Jin Zhaobo,Liu Luwei,Wu Jirong
A non-aqueous phase (Sb/Fe/NMP) desulfurization system for the removal of hydrogen sulfide from natural gas was constructed by introducing SbCl 3 and FeCl 3 in a specific ratio into N-methylpyrrolidone (NMP). The desulfurizing agent and its sulfur product were characterized, and the absorption pattern of H 2 S by the system was investigated by static desulfurization experiments. The results indicate that the desulfurizer’s sulfur capacity can reach 16 g/L at room temperature and pressure, and that adding the optimum amount of water and appropriate temperature increase can assist to increase desulfurization efficiency. The system maintained a sulfur capacity level of more than 90% of the initial sulfur capacity after five consecutive desulfurization-regeneration cycles. XRD and XPS spectrogram revealed that the regenerated solid product was high purity sulfur. Sb 3+ is a key component to ensure the effective absorption of H 2 S. The presence of a moderate amount of Fe 3+ can oxidize and absorb small amounts of H 2 S and promote the oxidative regeneration of the system. In addition, we combined the obtained experimental data with density flooding theory (DFT) theoretical calculations to show that the effective coordination of Sb(III) with HS − in the NMP environment is the main reason for the effective absorption of H 2 S by the desulfurizer. NMP is not involved in the coordination absorption process of hydrogen sulfide.
研究领域:
化学工程
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环境科学
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理论化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RARE EARTHS
·
2020
·
IF 3.104
Xuechao Hu,Junhui Dong
Sulfides existing in many gas mixtures of high temperature cases have a negative effect on various industrial applications. In this study, we present samarium-doped cerium (SDC) sorbent to remove H 2 S at high temperature. Compared with pure CeO 2 , the SDC sorbent shows excellent ability in sulfur removal because of the positive effect of the doping of Sm. The H 2 has a negative influence on sulfidation of the SDC sorbent and significantly shortens the breakthrough time, hence breakthrough sulfur capacity (BSC). The carbon monoxide present in the feed gas has no obvious effect on the sulfur-removal performance. A suitable samarium loading in SDC leads to an optimum interaction between metal oxide species and the surface oxygen vacancies , which results in an optimal adsorbed activity of reduced gas (H 2 , H 2 S) and hence desulphurization performance. In addition, the SDC sorbents have a good regenerated ability by a simple calcination process.
研究领域:
材料科学
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环境化学
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能源工程
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无机化学
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催化化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2015
·
IF 4.321
Dongjing Liu,Weiguo Zhou,Jiang Wu
x Ce y Mn/ZSM-5 sorbents were prepared using sol–gel method and employed for H 2 S removal in the temperature range of 600–800 °C. The sorbents exhibited high performance in sulfur removal due to the cooperative effect of CeO 2 and MnO x . The presence of H 2 was unfavorable for sulfidation and obviously shortened the breakthrough time and reduced the sulfur capacity. However, the existence of CO had little impact on the sulfur-removal performance. The characterization results revealed that the ZSM-5 structure remained intact during preparation and sulfidation process. And active species, such as CeO 2 and Mn 2 O 3 , were well dispersed on ZSM-5, which would suppress the mechanical disintegration and improve the thermal stability of x Ce y Mn/ZSM-5.
研究领域:
环境催化
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能源化学工程
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材料科学
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无机功能材料
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气体净化技术
✓ 已验证
DOI
高影响因子
KOREAN JOURNAL OF CHEMICAL ENGINEERING
·
2016
·Vol. 33
·期 6
·1837-1845
·
IF 1.408
Liu Dongjing,Zhou Weiguo,Wu Jiang
Performance of CeO 2 -La 2 O 3 /ZSM-5 sorbents for sulfur removal was examined at temperature ranging from 500 oC to 700 oC. The sulfur capacity of 5Ce5La/ZSM-5 was much bigger than that of CeO 2 /ZSM-5. H 2 had a negative impact on the sulfidation; however, CO had little influence on sulfur removal. The characterization results showed that CeO 2 and La 2 O 3 were well dispersed on ZSM-5 because of the intimate admixing of La 2 O 3 and CeO 2 , the major sulfidation products were Ce 2 O 2 S and La 2 O 2 S, the XRD and SEM results revealed that ZSM-5 structure could remain intact during preparation and sulfidation process, the H 2 -TPR showed that the reducibility of CeO 2 can be remarkably enhanced by addition of La.
研究领域:
材料科学
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环境化学
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催化化学
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能源工程
·
无机功能材料
·
气体净化
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Xiaoxia Zhang,Yongjin Wang,Junjie Liao,Jiancheng Wang,Liping Chang,Weiren Bao
Coke oven gas (COG) is a hydrogen-rich byproduct whose efficient utilization requires deep removal of organic sulfur compounds such as thiophene . While Cu-based sorbents exhibit excellent desulfurization performance, the influence of precursor structural characteristics on their activity remains poorly understood. In this study, the relationship between precursor assembly and desulfurization performance of unpromoted Cu/ZnO/Al 2 O 3 sorbents was systematically elucidated. Three synthesis routes were explored to tailor precursor structures, revealing that aurichalcite-derived precursors enable superior Cu dispersion, stronger Cu-Zn interaction, and enhanced reducibility of active sites. The optimized sorbent prepared via urea hydrolysis achieved an exceptional breakthrough sulfur capacity of 29.91 mg/g—nearly twice that of hydrotalcite-derived counterparts—without the use of additional promoters. Mechanistic analysis further demonstrates that the precursor structure governs the formation of highly reducible Cu species and promotes thiophene activation through improved hydrogenation pathways. These findings provide new insights into the design of high-performance Cu-based sorbents.
研究领域:
材料科学
·
化学工程
·
环境催化
·
能源利用
·
无机化学
✓ 已验证
产品关联
DOI
高影响因子
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
·
2016
·Vol. 94
·期 12
·2276-2281
·
IF 1.066
Dongjing Liu,Weiguo Zhou,Jiang Wu
The high-temperature H 2 S removal at 500–700 °C was conducted over CuO-CeO 2 /ZSM-5 composites prepared with sol-gel method. 7Cu3Ce/ZSM-5 partially reacting at 500 °C yielded Cu 7 S 4 and Cu 2 S. The major sulphidation products at 600 °C were Ce 2 O 2 S, Cu 2 S, CuS, and S. Sulphidation of 7Cu3Ce/ZSM-5 at 700 °C yielded Ce 2 S 3 , Cu 2 S, Cu 2 S, and S. Sulphidation of 7Cu3Ce/ZSM-5 with 20 % H 2 and 20 % CO generated the same products Ce 2 O 2 S, Cu 2 S, Cu 2 S, and S. Increase in the degree of crystallinity of 7Cu3Ce/ZSM-5 resulted in the decrease of sulphur capacity during the sulphidation and regeneration process. Experimental results showed that the activity of CuO improved by adding Ce; 7Cu3Ce/ZSM-5 performed the optimal sulphiation behaviour at 600 °C with sulphur capacity of 1429 μmol/g (micromoles of sulphur per gram) due to the synergy of CuO and CeO 2 . H 2 repressed sulphur removal, causing the reduction of sulphur capacity from 1429 to 1014 μmol/g. CO had little impact on sulphidation reaction; sulphur capacity only reduced from 1429 to 1221 μmol/g due to the presence of 20 % CO.
研究领域:
环境催化
·
能源化学工程
·
材料科学
·
无机化学
·
气体净化技术
✓ 已验证
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2021
·
IF 5.455
Chengcheng Huang,Zipeng Zhao,Enming Ping,Lijuan Zhang,Yunshan Zhou,Libo Qin
The Ag@CPO-27-Ni composites were deliberately synthesized with different loading amounts of silver nano-particles in CPO-27-Ni which features unsaturated metal sites and cylindrical one-dimensional channels having a diameter of ca. 11 Å constructed by 2,5-dihydroxybenzene-1,4-dicarboxylate and Ni 2+ by a simple one-pot solvothermal method. The well-characterized composites were used as adsorbents to eliminate the aromatic S-compounds of the model oil and fluid catalytic cracking (FCC) oil at room temperature. The experimental results showed that the adsorptive desulfurization followed pseudo-second order reaction kinetics and the adsorptive desulfurization capacity of Ag@CPO-27-Ni (wherein Ag is 1.23 wt%) was notably enhanced as compared with CPO-27-Ni under the same experimental conditions. Impressively, 35 ppmw S dibenzothiophene (DBT) (or benzothiophene (BT))-containing model oil (20 g) was desulfurized to 2.01 ± 0.27 (or 4.05 ± 0.26) ppmw S by using 0.2 (or 0.5) g of the composite, respectively; the composite showed much higher selectivity factor of adsorbing DBT to naphthalene than CPO-27-Ni. The notable enhancement in adsorptive desulfurization performance is thought to be due to the interactions between Ag particles and sulfur or π-system of thiophene moiety in the S-containing compounds that consequently promote selective attraction between S-containing compounds and the composite. Besides, the composite also showed satisfactory recyclability.
研究领域:
材料科学
·
环境化学
·
催化
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2018
·Vol. 10
·期 38
·18407-18414
·
IF 7.233
Yong Wang,Xin Liang,Jufeng Yun,Pengcheng Shi,Peng Lu,Yi Sun,Hongfa Xiang
In this work, a ternary confined-functional sulfur composite with a Host–Sulfur–Container structure is designed and synthesized for high performance lithium sulfur batteries. The host in this unique architecture is porous carbon, which contains interconnected macropore tunnels and meso/micropores on the macropore tunnel walls. These hierarchical pores exhibit a synergistic effect to adsorb sulfur in their spaces and provide more nucleation sites to direct the uniform coating of sulfur. Moreover, the interconnected porous structure can facilitate electron transfer and also ensure high sulfur utilization. Furthermore, the poly(3,4-ethylenedioxythiophene) layer container improves the conductivity of the electrode, prevents the diffusion of dissolved polysulfide, and prevents volume expansion during the charge–discharge processes. As a result, the electrode with the poly(3,4-ethylenedioxythiophene)/sulfur/porous carbon composite and Host–Sulfur–Container architecture maintains a reversible capacity of 831.9 mA h g−1 after 200 cycles at a current density of 0.5 C and presents long-term cycling stability with 0.088% capacity decay per cycle over 500 cycles at 1 C. This indicates that the prepared Host–Sulfur–Container composite is a promising cathode material for lithium–sulfur batteries, and its hierarchical tunnel pore carbon host with meso/micropores inside shows great potential in the energy storage field.
研究领域:
材料科学
·
能源存储
·
电池技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）