Effect of potassium carbonate on catalytic synthesis of calcium carbide at moderate temperature

doi:10.1007/s11705-010-0570-1

Front Chem Sci Eng

2011, Vol. 5

Issue (3) : 372-375 https://doi.org/10.1007/s11705-010-0570-1

RESEARCH ARTICLE

Effect of potassium carbonate on catalytic synthesis of calcium carbide at moderate temperature

Dejun SHI, Ke QIAO, Zifeng YAN(

)

State Key Laboratory of Heavy Oil Processing, CNPC Key Laboratory of Catalysis, China University of Petroleum, Qingdao 266555, China

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Abstract

Calcium carbide was successfully synthesized by carbothermal reduction of lime with coke at 1973 K for 1.5 h. The effect of potassium carbonate as additive on the composition and morphology of the product was investigated using X-ray diffraction and scanning electron microscope. Addition of potassium carbonate increased the yield of calcium carbide. The sample in the presence of potassium carbonate generated acetylene gas of 168.3 L/kg, which was 10% higher than that in the absence of potassium carbonate. This result confirmed the catalytic effect of potassium carbonate on the synthesis of calcium carbide. A possible mechanism of the above effects was that the additive, which was melted at the reduction temperature, dissolved CaO and so promoted the contact between CaO and carbon, which was essential for the solid-solid reaction to form calcium carbide.

Keywords calcium carbide synthesis catalysis

Corresponding Author(s): YAN Zifeng,Email:zfyancat@upc.edu.cn

Issue Date: 05 September 2011

Cite this article:

Dejun SHI,Ke QIAO,Zifeng YAN. Effect of potassium carbonate on catalytic synthesis of calcium carbide at moderate temperature[J]. Front Chem Sci Eng, 2011, 5(3): 372-375.

URL:

https://academic.hep.com.cn/fcse/EN/10.1007/s11705-010-0570-1
https://academic.hep.com.cn/fcse/EN/Y2011/V5/I3/372

Fig.1 XRD patterns of the samples. (A) raw material; (B) reduced sample without addition of KCO; (C) reduced sample with addition of KCO

Fig.2 Effect of KCO in the raw materials on the amount of acetylene gas generated from reduced samples. (1) without KCO; (2) with KCO

Tab.1 Surface and pore properties of the reduced samples by BET analysis

Fig.3 SEM images of the reduced samples. (a) without KCO; (b) with KCO

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