Differential Thermal Analysis of Calcium Carbide Formation

Thoburn, W. J.; Pidgeon, L. M.

doi:10.1179/cmq.1965.4.3.205

Cited by 7 publications

(3 citation statements)

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“…The large granular feeds, however, inevitably lead to poor contact between the feeds and consequently limit the mass and heat transfer and reaction rates. The high reaction temperature (∼2200 °C , ) and long reaction time (1–2 h) are used to overcome these limitations and result in high electricity consumption (∼4000 kW·h per ton of pure CaC 2 ).…”

Section: Introductionmentioning

confidence: 99%

Kinetic Behaviors of CaC₂ Production from Coke and CaO

Liu

2013

Ind. Eng. Chem. Res.

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To replace the high-temperature and energy extensive traditional calcium carbide (CaC 2 ) production technique, characterized by electric arc heating and large granular feeds of coke and calcium oxide (CaO), methods using fine feeds with autothermal heating were reported to be promising at lower temperatures in the literature. To understand the kinetic behaviors of the low-temperature CaC 2 production, a series of experiments were carried out in a thermal gravimetric analyzer (TGA) coupled online with a mass spectrometer (MS). The results indicate that the initial temperature for the CaC 2 formation decreases linearly with an increase in contact points between the coke and CaO particles. The reaction proceeds differently in two temperature ranges, from 1550 to 1700 °C and from 1700 to 1750 °C. The rate-limiting step in the low-temperature range is mass transfer of solid CaO toward solid coke with an apparent activation energy of about 456 kJ mol −1 , while that in the hightemperature range is mass transfer of liquid CaO in the form of CaC 2 −CaO eutectics toward solid coke with a much lower apparent activation energy of about 256 kJ mol −1 . The direction of the mass transfer and the change in mass transfer mode were further confirmed by a number of special design experiments.

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Section: Introductionmentioning

confidence: 99%

Kinetic Behaviors of CaC₂ Production from Coke and CaO

Liu

2013

Ind. Eng. Chem. Res.

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“…Solid-state reactions of BaCOs with Pb304 (313), CoO with W03 (337), La203 with NH4N03 (168), Sr(OA)2-2H20 with Zn(OA)2 ( 274), as well as high temperature acid-base reactions reported by Wendlandt and his students (391, 392), indicate the suitability of DTA for such work. In a study of CaO with C to form CaC2 (417), it was possible to show that this commercially important reaction could take place as low as 1550°C. Reaction of S03 with several alkali metal phosphates was investigated using a sealed ampoule technique (215).…”

Section: Differential Thermal Analysis (Dta)mentioning

confidence: 99%

Thermal analysis

Murphy¹

1968

Anal. Chem.

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“…As we know, calcium carbide production is an energy-intensive process. It is industrially produced in an electric arc furnace at a very high reaction temperature of up to 2000–2200 °C, and at high energy consumption of 3300 kW·h·ton −1 standard calcium carbide [ 3 , 4 , 5 , 15 ]. Partly due to the energy-intensive nature of the calcium carbide production, academic research and technology improvement on coal to calcium carbide is relatively limited, compared with coal to olefins mainly by Fischer–Tropsch synthesis or MTO processes.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Mass Diffusion Behaviors of Calcium Oxide and Carbon in the Solid-State Synthesis of Calcium Carbide by Microwave Heating

Chen

Dai

et al. 2021

Molecules

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Microwave (MW) heating was proven to efficiently solid-synthesize calcium carbide at 1750 °C, which was about 400 °C lower than electric heating. This study focused on the investigation of the diffusion behaviors of graphite and calcium oxide during the solid-state synthesis of calcium carbide by microwave heating and compared them with these heated by the conventional method. The phase compositions and morphologies of CaO and C pellets before and after heating were carefully characterized by inductively coupled plasma spectrograph (ICP), thermo gravimetric (TG) analyses, X-ray diffraction (XRD), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). The experimental results showed that in both thermal fields, Ca and C inter-diffused at a lower temperature, but at a higher temperature, the formed calcium carbide crystals would have a negative effect on Ca diffusion to carbon. The significant enhancement of MW heating on carbon diffusion, thus on the more efficient synthesis of calcium carbide, manifested that MW heating would be a promising way for calcium carbide production, and that a sufficient enough carbon material, instead of CaO, was beneficial for calcium carbide formation in MW reactors.

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Differential Thermal Analysis of Calcium Carbide Formation

Cited by 7 publications

References 7 publications

Kinetic Behaviors of CaC₂ Production from Coke and CaO

Kinetic Behaviors of CaC₂ Production from Coke and CaO

Thermal analysis

Experimental Investigation on the Mass Diffusion Behaviors of Calcium Oxide and Carbon in the Solid-State Synthesis of Calcium Carbide by Microwave Heating

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Differential Thermal Analysis of Calcium Carbide Formation

Cited by 7 publications

References 7 publications

Kinetic Behaviors of CaC2 Production from Coke and CaO

Kinetic Behaviors of CaC2 Production from Coke and CaO

Thermal analysis

Experimental Investigation on the Mass Diffusion Behaviors of Calcium Oxide and Carbon in the Solid-State Synthesis of Calcium Carbide by Microwave Heating

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Product

Resources

About

Kinetic Behaviors of CaC₂ Production from Coke and CaO

Kinetic Behaviors of CaC₂ Production from Coke and CaO