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A critical review towards the causes of the iron-based catalysts deactivation mechanisms in the selective oxidation of hydrogen sulfide to elemental sulfur from biogas 被引量:1
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作者 Mostafa Tarek Janaina S.Santos +4 位作者 Victor Márquez Mohammad Fereidooni Mohammad Yazdanpanah Supareak Praserthdam Piyasan Praserthdam 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2024年第3期388-411,I0010,共25页
Hydrogen sulfide(H_(2)S) not only presents significant environmental concerns but also induces severe corrosion in industrial equipment,even at low concentrations.Among various technologies,the selective oxidation of ... Hydrogen sulfide(H_(2)S) not only presents significant environmental concerns but also induces severe corrosion in industrial equipment,even at low concentrations.Among various technologies,the selective oxidation of hydrogen sulfide(SOH_(2)S) to elemental sulfur(S) has emerged as a sustainable and environmentally friendly solution.Due to its unique properties,iron oxide has been extensively investigated as a catalyst for SOH_(2)S;however,rapid deactivation has remained a significant drawback.The causes of iron oxide-based catalysts deactivation mechanisms in SOH_(2)S,including sulfur or sulfate deposition,the transformation of iron species,sintering and excessive oxygen vacancy formation,and active site loss,are thoroughly examined in this review.By focusing on the deactivation mechanisms,this review aims to provide valuable insights into enhancing the stability and efficiency of iron-based catalysts for SOH_(2)S. 展开更多
关键词 Selective oxidation of H_(2)S iron-based Catalysts Mechanism of deactivation Sulfur or sulfate deposition Transformation of iron species Sintering SDG 7
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Measurement of iron characteristics under ramp compression
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作者 魏会冈 E Brambrink +9 位作者 N Amadou A Benuzzi-Mounaix A Ravasio G Morard F Guyot T de Rességuier N Ozaki K Miyanishi 赵刚 M Koenig 《Chinese Physics B》 SCIE EI CAS CSCD 2017年第11期360-364,共5页
Laser-driven ramp compression was used to investigate iron characteristics along the isentropic path. The iterative Lagrangian analysis method was employed to analyze the free surface velocity profiles in iron stepped... Laser-driven ramp compression was used to investigate iron characteristics along the isentropic path. The iterative Lagrangian analysis method was employed to analyze the free surface velocity profiles in iron stepped target measured with two VISARs. The onset stress for the α to ε phase transformation was determined from the sudden change in the sound velocity and was found over-pressurized compared to the static and shock results. The derived stress(26 GPa) and strain rate(up to 10-8 s^-1) are consistent with our previous experimental results. The stress-density relations were compared with those from previous ramp experiments and good agreements were found, which experimentally confirms the simulations,showing that iterative Lagrangian analysis can be applied to the ramp-compression data with weak shock. 展开更多
关键词 isentropic compression iron phase transformation
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New Industrialization Path: The Strategic Choice of Chinese Iron and Steel Industry
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作者 Yuanguan She Li Yuan Xia Zhao 《Chinese Business Review》 2006年第4期34-41,共8页
The fact-developing iron and steel industry provides the base for China economy to grow continually, stably and healthily for many years. This paper analyzes the situation and the disparity, which the iron and steel i... The fact-developing iron and steel industry provides the base for China economy to grow continually, stably and healthily for many years. This paper analyzes the situation and the disparity, which the iron and steel industry faces, and attests that the new industrialization path is the strategic choice for the Chinese iron and steel industry to develop continuously, and carries on the thorough discussion to the connotation of this choice. 展开更多
关键词 iron and steel industry new industrialization transformation
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High-temperature chlorination of gold with transformation of iron phase 被引量:2
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作者 Zheng-Yao Li Wei-Wei Wang +1 位作者 Kun Yue Ming-Xing Chen 《Rare Metals》 SCIE EI CAS CSCD 2016年第11期881-886,共6页
Gold in cyanide tailings from Shandong Province is mainly encapsulated by hematite and magnetite at distribution rates of 76.49 % and 10.88 %, respectively.Chlorination-reduction one-step roasting of cyanide tailings ... Gold in cyanide tailings from Shandong Province is mainly encapsulated by hematite and magnetite at distribution rates of 76.49 % and 10.88 %, respectively.Chlorination-reduction one-step roasting of cyanide tailings was conducted under the following conditions: calcium chloride dosage of 6 %, bituminous coal dosage of 30 %, calcium oxide dosage of 10 %(all dosages are vs.the mass of cyanide tailings) at 1000 ℃ of roasting temperature. X-ray diffraction(XRD), scanning electron microscopy(SEM), and chemical-phase analysis were performed to investigate the effects of iron phase transformation on the high-temperature chlorination of gold.Results indicate that the lattice structure of hematite undergoes expansion, pulverization, and reorganization when hematite is reduced to magnetite, which leads to42.03 % gold exposure, and the high-temperature chlorination rate of gold is 41.17 % at the same time. The structure of wustite formed by the reduction in magnetite is porous and loose, and thus 44.02 % of gold is exposed. The high-temperature chlorination rate of gold is increased by41.98 percentage points. When wustite is reduced to metallic iron, 4.42 % of gold is exposed, and the hightemperature chlorination rate of gold is increased by3.38 percentage points. Accordingly, the high-temperature chlorination of gold mainly occurs in two stages, in which Fe_2O_3 is reduced to Fe_3O_4, and Fe_3O_4 is reduced to Fe_xO finally. 展开更多
关键词 Cyanide tailings Chlorination-reduction one-step roasting Transformation of iron phase GOLD
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