Jichao Sun’s scientific contributions

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Publications (2)


Synthesis of a novel acid-base bifunctional Zn/Ca–Zr catalyst for biodiesel application: Experimental and molecular simulation studies
  • Article

August 2023

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7 Reads

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10 Citations

Renewable Energy

Hewei Yu

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Jichao Sun

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Xiuxiu Chen

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[...]

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Hongyu Si

Figure 2. The experimental flow chart of catalyst synthesis and transesterification.
Figure 8. XPS spectra of the Ca-Ce/slag-0.8 catalyst. (a) XPS survey; (b) O 1s; (c) Ca 2p; (d) Ce 3d.
Microstructural properties of the slag and Ca-Ce/slag-x catalysts.
CO 2 -TPD data for the slag and Ca-Ce/slag-x catalysts.
Comparison of performance efficiencies of various base catalysts.
Steel Slag Decorated with Calcium Oxide and Cerium Oxide as a Solid Base for Effective Transesterification of Palm Oil
  • Article
  • Full-text available

June 2023

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71 Reads

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5 Citations

Processes

For further resource utilization of solid waste steel slag and the reduction in biodiesel production costs, this study used steel slag as a carrier to synthesize a CaO-CeO2/slag solid base catalyst for the effective transesterification of palm oil into fatty acid methyl esters (FAMEs). The synthesis involved a two-step impregnation of steel slag with nitrate of calcium and cerium and thermal activation at 800 °C for 180 min. Then, the catalysts’ textural, chemical, and CO2 temperature-programmed desorption properties were characterized. The catalytic activity depended highly on the ratio of Ca-Ce to steel slag mass; the CaO-CeO2/slag-0.8 catalyst showed outstanding performance. Characterization showed that the surface area and total basicity of the Ca-Ce/slag-0.8 catalyst were 3.66 m2/g and 1.289 mmol/g, respectively. The reactivity results showed that FAMEs obtained using 7 wt.% catalyst, 9:1 of methanol-to-palm-oil molar ratio, 180 min reaction duration, and 70 °C reaction temperature was optimum (i.e., 95.3% yield). In addition, the CaO-CeO2/slag-0.8 catalyst could be reused for at least three cycles, retaining 91.2% of FAMEs yield after n-hexane washing. Hence, the catalyst exhibits an excellent potential for cost-effective and environmentally friendly biodiesel production.

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Citations (1)


... In fact, steel slags without any modification have been successfully employed as catalyst for the preparation of biodiesel under conventional heating using soybean oil as the feedstock, [15] while doped waste steel slags have been used for the transesterification of palm oil. [16] However, in the presence of neat steel slags long reaction time (12 h) and high temperatures (120°C) have been required to reach reaction completion, with edible oils being used as starting feedstock, [15] making the whole process economically inconvenient. Indeed, it is world-wide recognized that microwave irradiation ensures a more efficient and faster heating than conventional methods, enabling a considerable energy saving. ...

Reference:

Microwave Assisted Biodiesel Production from Waste Cooking Oil Using Steel Slags as Catalyst
Steel Slag Decorated with Calcium Oxide and Cerium Oxide as a Solid Base for Effective Transesterification of Palm Oil

Processes