Cleaner energy production with integrated gasification combined cycle systems and use of metal oxide sorbents for H2S cleanup from coal gas

Atimtay, Aysel T.

doi:10.1007/pl00011306

Cited by 28 publications

(12 citation statements)

References 50 publications

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“…1(b) and (c)). In previous studies, it was found that solid sorbents based upon Mn have promising desulfurization potential (Westmoreland and Harrison, 1976;Atimtay, 2001). Laboratory scale experiments have also been conducted, and Mn-based sorbents were proved to have high desulfurization performance (Bakker et al, 2003;Ko et al, 2005).…”

Section: Thermodynamic Screeningmentioning

confidence: 99%

High-Temperature Cleaning for Chlorine-Containing Coal Gas by Supported Manganese Oxide Sorbent

Tseng

Wang

Chu

2012

Aerosol Air Qual. Res.

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This research aimed to achieve HCl removal for chlorine-containing hot coal gas by using supported oxide sorbents in a fixedbed reactor at 673-873 K. Mn 2 O 3 /SiO 2 was chosen as the optimal sorbent to eliminate chlorine species, after thermodynamic screening of the dechlorination potential of sorbents based upon various metals. The dechlorination experiments and results of the ICP, BET, XRD, XPS, and FTIR analyses provided in-depth views of the reaction chemistry behind the complex system of HCl removal in a simulated syngas containing 3,000 ppm HCl, 25 vol% CO, 15 vol% H 2 , and N 2 . When the sorbent composed of 23 wt% Mn 2 O 3 /SiO 2 came into contact with HCl, CO, and H 2 , the reaction mechanism contained two paths. At lower temperatures Mn 2 O 3 tended to react with HCl, while at higher temperatures it might first be reduced into Mn 3 O 4 and then react with HCl. The probable products from the reaction (Mn 2 O 3 and HCl or Mn 3 O 4 and HCl) are MnCl 2 , Cl 2 , and H 2 O. That is, as the reaction temperature increased, the second path started to become more important. The final product of this reaction might also include metallic manganese in addition to MnCl 2 . Furthermore, when the temperature increased, the equilibrium constants of all the reactions reduced, and subsequently resulted in the decreasing sorbent performance.

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Section: Thermodynamic Screeningmentioning

confidence: 99%

High-Temperature Cleaning for Chlorine-Containing Coal Gas by Supported Manganese Oxide Sorbent

Tseng

Wang

Chu

2012

Aerosol Air Qual. Res.

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“…However, the growth in energy production need not take place to the detriment of the environment, so that strict regulations on pollutant emissions have been imposed around the world. An integrated gasification combined cycle (IGCC) systems are being advanced today, due to their higher thermal efficiency and superior environmental performance and economics, compared to conventional plants [293]. The development of these systems depends on the ability to remove sulphur compounds, mainly H2S, from the coal gas.…”

Section: Desulphurization Of Hot Coal Gasmentioning

confidence: 99%

Applications and Preparation Methods of Copper Chromite Catalysts: A Review

Прасад

2011

Bull. Chem. React. Eng. Catal.

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In this review article various applications and preparation methods of copper chromite catalysts have been discussed. While discussing it is concluded that copper chromite is a versatile catalyst which not only catalyses numerous processes of commercial importance and national program related to defence and space research but also finds applications in the most concerned problem worldwide i.e. environmental pollution control. Several other very useful applications of copper chromite catalysts are in production of clean energy, drugs and agro chemicals, etc. Various preparation methods about 15 have been discussed which depicts clear idea about the dependence of catalytic activity and selectivity on way of preparation of catalyst. In view of the globally increasing interest towards copper chromite catalysis, reexamination on the important applications of such catalysts and their useful preparation methods is thus the need of the time. This review paper encloses 369 references including a well-conceivable tabulation of the newer state of the art.

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“…Previous literatures have reported on sorbent based upon manganese having promising desulfurization potential (Westmoreland and Harrison, 1976;Atimtay, 2001). Laboratory scale experiments were also conducted showing that Mn-based sorbents had high desulfurization performance (Bakker et al, 2003;Ko et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Influence of CO and H2 Concentrations on Coal Gas Dechlorination by Supported Manganese Oxide Sorbent

Tseng

Wang

Chu

2013

Aerosol Air Qual. Res.

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The Mn 2 O 3 /SiO 2 sorbent prepared by incipient wetness impregnation was investigated for the elimination of chlorine species produced from coal gasification. The experiments were conducted in a fixed-bed reactor at 673 K with the Mn 2 O 3 /SiO 2 sorbent at various CO and H 2 concentrations to evaluate their influences on the dechlorination performance. It was observed that the absence of inlet H 2 led to a drastic decrease in the sorbent capacity; i.e., the presence of H 2 was essential for achieving dechlorination. Furthermore, the concentration of CO seemed to have no obvious effect on the HCl removal.Through the breakthrough experiments, X-ray powder diffractometer, and Fourier transform infrared spectroscopy analysis, the overall dechlorination mechanism of the Mn 2 O 3 /SiO 2 sorbent in a chlorine-containing coal gas system was successfully described in this study. The mechanism consisted of three major routes: (a) Mn 2 O 3 reacted with HCl to form MnCl 2 , (b) Mn 2 O 3 was first reduced into Mn 3 O 4 and then reacted with HCl to produce MnCl 2 , and (c) without the involvement of HCl in the dechlorination experiments, the Mn 2 O 3 contained in the fresh sorbent was first reduced to Mn 3 O 4 and then to MnO under the strong reducing atmosphere provided by CO and/or H 2 .

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Cleaner energy production with integrated gasification combined cycle systems and use of metal oxide sorbents for H2S cleanup from coal gas

Cited by 28 publications

References 50 publications

High-Temperature Cleaning for Chlorine-Containing Coal Gas by Supported Manganese Oxide Sorbent

High-Temperature Cleaning for Chlorine-Containing Coal Gas by Supported Manganese Oxide Sorbent

Applications and Preparation Methods of Copper Chromite Catalysts: A Review

Influence of CO and H2 Concentrations on Coal Gas Dechlorination by Supported Manganese Oxide Sorbent

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