Desulfurization of fuels with calcium-based sorbents

Abbasian, Javad; Rehmat, A.; Leppin, Dennis; Banerjee, D.D.

doi:10.1016/0378-3820(90)90091-6

Cited by 45 publications

(44 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Different quantities of sulphur from the gasification atmosphere were also retained during the experiments. It should be pointed out that sulphur retention capacities ranging from 6 to 400 mg g -1 , are described in the literature, 7 and the retention mechanisms have been well established [1] [2]. Although in our retention experiments the MRC for sulphur was not achieved, from an analysis of the quantity of sulphur simultaneously retained, it was possible to estimate the "retention velocity"…”

Section: Resultsmentioning

confidence: 99%

“…The high temperature and the reducing atmosphere produced certain modifications in the morphology of these solids (Figure 2). These modifications were mainly due to the formation of FeS or ZnS from the reactions between the sulphur present in the gas atmosphere and the spinel compound [1][2]. 4,6 FeS and ZnS were identified by XRD Because it was not possible to identify the arsenic and selenium species present in the gas phase at the temperatures of the experiments, a theoretical approximation was performed, using thermodynamic equilibrium models.…”

Section: Resultsmentioning

confidence: 99%

“…These materials are cheap, widely available, and commonly employed to remove sulphur from both combustion and gasification processes. [1][2][3] However, they generate a huge quantity of solid residues. An alternative to hot gas desulphurisation in IGCC, is the use of regenerable sorbents such as metal oxides or metal oxide mixtures, because these materials can be used in several cycles and in small quantities.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Retention of Arsenic and Selenium during Hot Gas Desulfurization Using Metal Oxide Sorbents

2004

View full text Add to dashboard Cite

The present work explores the possibility of capturing toxic elements other than sulphur in coal gasification flue gases using metal oxide mixtures. Arsenic and selenium compounds were the elements selected for study because they are toxic species which are present in coal gasification flue gases in different amounts, depending on temperature. Among the regenerable sorbents already developed for hot gas cleaning systems in Integrated Gasification Combined Cycles, metal oxide mixtures based on iron, titanium or zinc oxides (zinc ferrites and zinc titanates) were tested for arsenic and selenium retention. These sorbents have previously proved to possess good characteristics for H 2 S(g) retention. The study was carried out in a laboratory scale reactor, using the sorbent in a fixed bed, at 550ºC. Good retention capacities (56 mg g -1 )were obtained in these conditions for selenium in a metal oxide mixture containing zinc titanate. A metal oxide mixture containing zinc ferrite proved to be an appropriate sorbent for both elements, retention capacities being 21 mg g -1 for arsenic and 55 mg g -1 for selenium. The results obtained indicate that arsenic and selenium compounds can be retained together with sulphur compounds in these sorbents and be desorbed in the sorbent regeneration processes.3

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Retention of Arsenic and Selenium during Hot Gas Desulfurization Using Metal Oxide Sorbents

2004

View full text Add to dashboard Cite

show abstract

“…Many studies of the reaction between calcined limestone (CaO) and half or fully calcined dolomites (respectively CaC0 3 -Mg0 and CaO-MgO) with HzS have been published (Abbasian et al, 1990;Freund, 1981;Squires et al, 1971;Ruth et al, 1972;Yen, 1979). These works were often concerned with the addition of limestone or dolomite to the coal in the gasifier where the conditions are such that the calcination of the calcium carbonate or the magnesium carbonate might occur rapidly (Freund, 1981), or were conducted at a C0 2 fugacity low enough to obtain partial or total calcination of the calcium carbonate.…”

Section: Chapi'er 2: Previous Workmentioning

confidence: 99%

Structural studies in limestone sulfidation

Fenouil¹

1993

View full text Add to dashboard Cite

“…Typical desulfurization processes involve lime chemistry [2][3][4] where byproducts are either of relatively low value, such as gypsum, or they are waste products requiring storage and eventual landfilling. However, new technologies involving regenerable sulfur sorbents have been devised, and many are proven effective for Integrated Gasification Combined Cycle applications [5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Sulfur-Based Water Treatment Agent From Sulfur Dioxide Waste Streams

Brown¹,

Fan²,

Cooper³

2002

View full text Add to dashboard Cite

Absorption of sulfur dioxide from a simulated flue gas was investigated for the production of polymeric ferric sulfate (PFS), a highly effective coagulant useful in treatment of drinking water and wastewater. The reaction for PFS synthesis took place near atmospheric pressure and at temperatures of 30-80°C. SO 2 removal efficiencies greater than 90% were achieved, with ferrous iron concentrations in the product less than 0.1%. A factorial analysis of the effect of temperature, oxidant dosage, SO 2 concentration, and gas flow rate on SO 2 removal efficiency was carried out, and statistical analyses are conducted. The solid PFS was also characterized with different methods. Characterization results have shown that PFS possesses both crystalline and non-crystalline structure. The kinetics of reactions among FeSO 4 ⋅7H 2 O, NaHSO 3 and NaClO 3 was investigated. The PFS product was used in pilot-scale tests at a municipal water treatment facility and gave good results in removal of turbidity and superior results in removal of disinfection byproduct precursors (TOC, DOC, UV-254) when compared with equal doses of ferric chloride.

show abstract

Desulfurization of fuels with calcium-based sorbents

Cited by 45 publications

References 9 publications

Retention of Arsenic and Selenium during Hot Gas Desulfurization Using Metal Oxide Sorbents

Retention of Arsenic and Selenium during Hot Gas Desulfurization Using Metal Oxide Sorbents

Structural studies in limestone sulfidation

Synthesis of Sulfur-Based Water Treatment Agent From Sulfur Dioxide Waste Streams

Contact Info

Product

Resources

About