CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Zhiyang Zhao,Dongqiang Cai,Juan Liu,Guifu Zou,Qiang Zhang,Zhanlong Song,Cuiping Wang,Longzhi Li
Direct cracking of hydrogen sulfide (H 2 S) can be used to obtain high purity hydrogen (H 2 ), thus avoiding the waste of hydrogen resources by the traditional Krauss process. Microwave-induced discharge of spherical graphitization petroleum coke (PC) was proposed to solve the problem of low efficiency and high energy consumption of H 2 S cracking. The PC was prepared by microwave-assisted desulfurization and metal (Fe, Co) catalytic graphitization to obtain better discharge effect. Subsequently, the graphitized PC was applied to induce microwave discharge, and the effects of graphitization parameters on the discharge performance were discussed. Lastly, the attention was concentrated on multi-effects catalytic decoupling and cracking kinetic properties of microwave-induced discharge for H 2 S cracking. PC with Fe 1 /Co 2 loading exhibited greater graphitization degree ( I D / I G = 1.027) (30.7 % than petroleum coke), brought stronger discharge intensity (initial and ending intensity at 4.08 V and 2.73 V in one-hour), and better discharge stability (67 % after one-hour) compared to PC raw coke. H 2 S cracking through microwave discharge catalysis exhibited a favorable catalytic effect, obtained a complete conversion at the initial stage and remained 95.58 % after one-hour, with H 2 yield of 98.1 %. With Fe 1 /Co 2 loading, H 2 S cracking had the least activated energy, 14.96 kJ/mol, which was the multi-effects of microwave discharge catalysis, thermal-catalysis and Co-catalysis. It was further calculated that discharge-catalysis dominated in H 2 S cracking, with the highest contribution, followed by Co-catalysis, and thermal-catalysis had the lowest contribution.
研究领域:
化学工程
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能源科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2014
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IF 3.065
Lidan Lv,Jie Zhang,Chongpin Huang,Zhigang Lei,Biaohua Chen
The removal of dimethyl disulfide from model liquefied petroleum gas using metal salt impregnated zeolite as the adsorbent was studied in a fixed-bed adsorption equipment. Effects of different carrier, metal iron species and content of active component, mass space velocity, temperature, as well as adsorption selectivity and regeneration performance were all investigated by performing the breakthrough experiment. Among all these adsorbents, 5 wt.%Ag 2 O/NaY showed the highest breakthrough sulfur capacity. The adsorption selectivity of Ag 2 O/NaY was studied by the infrared spectra. It was found that the direct S–Ag(I) interaction was the essential reason for the evidently improved adsorption ability and selectivity of Ag 2 O/NaY for removing disulfide from solutions containing olefin . Regeneration study indicated that the saturated adsorbent was regenerated under the temperature of 550 °C for 8 h in the air atmosphere. After five times regeneration, the adsorbent Ag 2 O/NaY still shows high breakthrough sulfur capacity.
研究领域:
化学工程
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环境科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING RESEARCH & DESIGN
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2020
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IF 3.35
Yuan-Yuan Zhan,Yong Cai,Guang-Wen Chu,Yong Luo,Liang-Liang Zhang,Jian-Feng Chen
Spent caustic from the desulfurization of liquefied petroleum gas has been proved to be effectively regenerated in a rotating packed bed (RPB) with classic wire mesh packing. However, the influence of the packing’s surface wettability on regeneration performance in the RPB was not clear with this oil-water two-phase system. In this work, the surface-modified packing was proposed to be used in the RPB to estimate the regeneration performance, including oxidation and separation efficiency. Three different surface-modified packings of hydrophilic surface-modified wire mesh packing (ISP), non-surface-modified wire mesh packing (NSP), and hydrophobic surface-modified wire mesh packing (OSP) were prepared and employed in the RPB for regeneration experiments. Results show that regeneration performance is in order of ISP＞NSP＞OSP. Compared with OSP, the NaSR conversion, RSSR removal efficiency, and number of transfer units of ISP increased nearly by 34%, 13%, and 21% at 1000 r/min rotational speed and 25 mm packing thickness, respectively. For the view of different packing combination, not only in the inner layer but also in the outer layer, ISP had noticeable superior regeneration performance, which displays the bright future of advanced surface-modified packing used in the RPB for process intensification of reaction and separation.
研究领域:
化学工程
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
POWDER TECHNOLOGY
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2020
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IF 4.142
Chunyun Zhu,Yaowen Xing,Yangchao Xia,Yongtian Wang,Guosheng Li,Xiahui Gui
Traditional non-polar oil collectors cannot achieve high recovery of low-rank coal because of the presence of oxygen-containing groups at coal surface. In this study, a new mixture of fossil oil and oxygen containing compound (FO) was used to enhance low-rank coal flotation compared with that using traditional collector, diesel oil. The oil droplet-particle detachment, induction-time, stability of the bubble-particle aggregate, attachment angle test and chemical force microscopy (CFM) were selected to further analyze the strengthening mechanism of collectors. The results show that higher yield was obtained using FO than that using diesel. Compared with diesel, FO was easier to adhere and spread on coal surface. The shorter induction time, higher amplitude and bigger attachment angle in presence of FO indicated that the FO treatment enabled the particles to much easily adhere to bubble. CFM provided a new insight into intensification mechanism of collector by the direct measurement of interaction force.
研究领域:
化学工程
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矿物加工
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煤炭科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）