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Preparation and characterization of rice husk ash silica and its application in degumming of rapeseed oil
  
DOI：10.12166/j.zgyz.1003-7969/2020.02.011
KeyWord:rice husk  rice husk ash silica  specific surface area  adsorption degumming  rapeseed oil
FundProject:安徽省高等学校自然科学研究项目（KJ2019A1116）
Author NameAffiliation
ZHENG Xuebin School of Biological Engineering, Hefei Vocational and Technical College, Hefei 238000, China 
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Abstract:
      Rice husk ash silica (RHAS) with high specific surface area and fine structure was prepared from rice husk, a by-product of agricultural production, and different approaches including EDX, FTIR, XRD, SEM and BET were used to characterize the RHAS. Meanwhile, RHAS was used as the degumming agent to investigate the effect of RHAS in the degumming process of rapeseed oil.The results showed that RHAS had uniform particle size and loose structure, and the BET specific surface area was 149 cm2/g. RHAS had strong adsorption effect on phospholipids in rapeseed oil, and the degumming rate could reached 57.8% under the conditions of degumming temperature 50 ℃, RHAS dosage 4.5%, and degumming time 40 min. After six cycles of degumming, the degumming rate was still about 35%.Therefore, RHAS could be used as a good new vegetable oil adsorption degumming agent.
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