Calcium sulfite hemihydrate: Crystal growth rate and crystal habit

Tseng, Philip C.; Rochelle, Gary T.

doi:10.1002/ep.670050107

Cited by 22 publications

(14 citation statements)

References 11 publications

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“…The crystallization of calcium sulfite is inhibited by increased gypsum saturation (dissolved calcium sulfate). Tseng 27 ' 28 found that the growth rate of one crystal face is inhibited by sulfate and that the thickness of individual platelets increases as solid sulfate content decreases: 10 percent oxidation gave 0.01 urn platelets, 3 percent oxidation gave 0.1 ^m platelets, and 1 percent oxidation gave 2 jum platelets. Chang et al 24 found that dewatering properties of dual alkali solids were improved by operating at conditions giving lower levels of solids oxidation.…”

Section: Solids Dewaterlngmentioning

confidence: 99%

Thiosulfate as an Oxidation Inhibitor in Flue Gas Desulfurization Processes: A Review of R&D Results

Rochelle

Owens

Chang

et al. 1986

Journal of the Air Pollution Control Association

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Section: Solids Dewaterlngmentioning

confidence: 99%

Thiosulfate as an Oxidation Inhibitor in Flue Gas Desulfurization Processes: A Review of R&D Results

Rochelle

Owens

Chang

et al. 1986

Journal of the Air Pollution Control Association

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“…Besides, the growth rates of sparingly soluble salts are also related to the solution properties, such as ionic strength, pH, and activity ratio [4][5][6][7]. Although studies on growth kinetics of sparingly soluble salts were found elsewhere [8][9][10], most of the experiments were conducted in a stirred tank using seeds below 50 mm with a few cases for the seed size of several-hundred micrometers, which is the suitable size used in a fluidized pellet reactor. For design purpose, a correlation between crystal growth rate of large seeds and process variables of pellet reactor is required.…”

Section: Introductionmentioning

confidence: 99%

Growth kinetics of CaF2 in a pH-stat fluidized-bed crystallizer

Tai

Chen

Tsao

2006

Journal of Crystal Growth

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“…Tai and Chen (1995) showed that their results were consistent with those of Tseng and Rochelle (1986).…”

Section: Kinetics Of Dissolution or Precipitation Of Hydroxy-aluminosmentioning

confidence: 69%

Injection of CO2 with H2S and SO2 and Subsequent Mineral Trapping in Sandstone-Shale Formation

Xu¹,

Apps²,

Pruess³

et al. 2004

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Abstract. Carbon dioxide (CO 2 ) injection into deep geologic formations can potentially reduce atmospheric emissions of greenhouse gases. Sequestering less-pure CO 2 waste streams (containing H 2 S and/or SO 2 ) would be less expensive or would require less energy than separating CO 2 from flue gas or a coal gasification process. The long-term interaction of these injected acid gases with shale-confining layers of a sandstone injection zone has not been well investigated. We therefore have developed a conceptual model of injection of CO 2 with H 2 S and/or SO 2 into a sandstone-shale sequence, using hydrogeologic properties and mineral compositions commonly encountered in Gulf Coast sediments of the United States. We have performed numerical simulations of a 1-D radial well region considering sandstone alone and a 2-D model using a sandstone-shale sequence under acid-gas injection conditions. Results indicate that shale plays a limited role in mineral alteration and sequestration of gases within a sandstone horizon for short time periods (10,000 years in present simulations). The co-injection of SO 2 results in different pH distribution, mineral alteration patterns, and CO 2 mineral sequestration than the co-injection of H 2 S or injection of CO 2 alone. Simulations generate a zonal distribution of mineral alteration and formation of carbon and sulfur trapping minerals that depends on the pH distribution. The co-injection of SO 2 results in a larger and stronger acidified zone close to the well. Precipitation of carbon trapping minerals occurs within the higher pH regions beyond the acidified zones. In contrast, sulfur trapping minerals are stable at low pH ranges (below 5) within the front of the acidified zone.Corrosion and well abandonment due to the co-injection of SO 2 could be important 1 issues. Significant CO 2 is sequestered in ankerite and dawsonite, and some in siderite.The CO 2 mineral-trapping capability can reach 80 kg per cubic meter of medium. Most sulfur is trapped through alunite precipitation, although some is trapped by anhydrite precipitation and minor amount of pyrite. The addition of the acid gases and induced mineral alteration result in changes in porosity. The limited information currently available on the mineralogy of natural high-pressure acid-gas reservoirs is generally consistent with our simulations.

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Calcium sulfite hemihydrate: Crystal growth rate and crystal habit

Cited by 22 publications

References 11 publications

Thiosulfate as an Oxidation Inhibitor in Flue Gas Desulfurization Processes: A Review of R&D Results

Thiosulfate as an Oxidation Inhibitor in Flue Gas Desulfurization Processes: A Review of R&D Results

Growth kinetics of CaF2 in a pH-stat fluidized-bed crystallizer

Injection of CO2 with H2S and SO2 and Subsequent Mineral Trapping in Sandstone-Shale Formation

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