Kinetics of flue gas desulphurization at low temperatures: fly ash/calcium (31) sorbent behaviour

Garea, A.; Viguri, Javier R.; Irabien, Ángel

doi:10.1016/s0009-2509(96)00452-6

Cited by 61 publications

(44 citation statements)

References 57 publications

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“…Also, bulk CFA is used in road and railroad bases, pavement, and in filling mining excavations. 9) New potential uses of CFA are as additives for the capture of industrial and water treatment wastes, 10), 11) sources of valuable metals, 12),13) sorbents for flue gas desulfurization, 14) fireproofing materials, 15) filter materials for the production of various products, 16) ceramic applications, 17)-19) synthesis of several type of zeolites, etc. 20), 21) This paper presents an overview of the recovery of CFA and its uses as a resource with an emphasis on promising new ways of using CFA.…”

Section: Introductionmentioning

confidence: 99%

Resource recovery from coal fly ash waste: an overview study

Jha

Matsuda

Miyake

2008

J. Ceram. Soc. Japan

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Coal fly ash (CFA) is a useful byproduct of the combustion of coal. It is composed primarily of almost perfectly spherical aluminosilicate glass particles. This spherical characteristic and other characteristics of CFA should be exploited, rather than simply using CFA as inert filler for construction. Unfortunately, the presence of carbon residues and high levels of heavy metals has so far limited the uses of CFA. Forced leaching methods have been used to improve the technical and environmentally friendly qualities of CFA, but these processes do not seem to be economically viable. Actually, CFA is a major source of Si and Al for the synthesis of industrial minerals. Potential novel uses of CFA, e.g., for the synthesis of ceramic materials, ceramic membrane filters, zeolites, and geopolymers, are reviewed in this article with the intention of exploring new areas that will expand the positive reuse of fly ash, thereby helping to reduce the environmental and economic impacts of CFA disposal.

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Section: Introductionmentioning

confidence: 99%

Resource recovery from coal fly ash waste: an overview study

Jha

Matsuda

Miyake

2008

J. Ceram. Soc. Japan

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“…Besides the utilization of bulk CFA, several potential uses of CFA have been reported as additives for the capture of industrial and water treatment wastes, sources of valuable metals, adsorbents for flue gas desulfurization, fireproofing materials, filter materials for the production of various products, ceramic applications and synthesis of several types of zeolites [2][3][4][5][6][7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Effective utilization of coal fly ash containing unburned carbon

Miyake

Jha

Kimura

et al. 2008

WIT Transactions on Ecology and the Environment

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We investigated the conversion process of coal fly ash with unburned carbon at greater than ca. 6 mass%, which has fallen behind in terms of resource recovery. As a result, composite materials consisting of zeolite A and/or zeolite X with good crystallinity and activated carbon were successfully prepared by NaOH fusion treatment at 750°C in N 2 flow followed by hydrothermal treatment. The type of zeolite phase formed was dependent on the hydrothermal treatment conditions including NaOH concentration. The resulting composite materials exhibited removal characteristics for heavy metal ions such as Ni 2+ , Cd 2+ and Pb 2+ . In this paper, we describe the conversion of the main SiO 2 -Al 2 O 3 components and unburned carbon in coal fly ash into zeolite-activated carbon composite materials by a chemical process and the removal characteristics of the resulting materials.

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“…The emission of SO x and NO x as a result of combustion taking place in boilers and furnaces has increasingly been recognized as a problem. Currently, the primary method of SO 2 and HCl disposal during incineration is neutralization with calcium-based sorbents, which results in huge amounts of waste. [1][2][3][4][5] All these flue gas desulfurization methods produce waste materials that must be collected, stored, and disposed.…”

Section: Introductionmentioning

confidence: 99%

“…However, the relatively expensive removal processes are feasible only for the large-scale incinerator. As a result, there is a strong incentive worldwide to apply efficient processes for recycling and reusing regenerative solid sorbents to help avoid problems associated with the disposal of these toxic and corrosive materials and possibly eliminate several shortcomings of the individual SO 2 and NO x removal operations.…”

Section: Introductionmentioning

confidence: 99%

The Utilization of Catalyst Sorbent in Scrubbing Acid Gases from Incineration Flue Gas

Wey

Tseng

et al. 2002

Journal of the Air & Waste Management Association

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Catalyst sorbents based on alumina-supported CuO, CeO 2 , and CuO-CeO 2 were applied to a dry scrubber to clean up the SO 2 /HCl/NO simultaneously from pilot-scale fluidized-bed incineration flue gas. In the presence of organic compounds, CO and the submicron particles SO 2 and HCl removed by the fresh catalyst sorbents and NO reduced to N 2 by NH 3 under the catalysis of fresh and spent desulfurization/dechloridization (DeSO 2 /DeHCl) catalyst sorbents (copper compounds, Cu, CuO, and CuSO 4 ) were evaluated in this paper. The fresh and spent catalyst sorbents were characterized by the BrunnerEmmett-Teller method (BET), X-ray powder diffraction (XRPD), scanning electron microscopy (SEM), inductively coupled plasma-mass spectrometry (ICP-MS), and the elemental analyzer (EA).The study showed that the performances of CuO, CeO 2 , and CuO-CeO 2 /γ-Al 2 O 3 were better than that of Ca(OH) 2 . The removal efficiency of SO 2 and HCl was 80-95% in the dry scrubber system. Under NH 3 /NO = 1, NO could not be reduced to N 2 because it was difficult to control the ratio of air/fuel in the flue gas. For estimating the feasibility of regenerating the spent catalyst sorbents, BET and EA analyses were used. They indicated that the pore structures were nearly maintained and a small amount of carbon accumulated on their surface.

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Kinetics of flue gas desulphurization at low temperatures: fly ash/calcium (31) sorbent behaviour

Cited by 61 publications

References 57 publications

Resource recovery from coal fly ash waste: an overview study

Resource recovery from coal fly ash waste: an overview study

Effective utilization of coal fly ash containing unburned carbon

The Utilization of Catalyst Sorbent in Scrubbing Acid Gases from Incineration Flue Gas

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