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Citation: YIN Zi-Chen, WANG Yan-Ling, ZHANG Chuan-Bao. Study of Adsorption Behavior of Hydroxypropyl Guar Gum on Kaolin[J]. Chinese Journal of Analytical Chemistry, ;2019, 47(1): 93-98. doi: 10.19756/j.issn.0253-3820.171441 shu

Study of Adsorption Behavior of Hydroxypropyl Guar Gum on Kaolin

School of Petroleum Engineering, China University of Petroleum(East China), Qingdao 266580, China

Received Date: 21 December 2017
Revised Date: 29 October 2018

Fund Project: This work was supported by the National Key Basic Research Program of China (No. 2015CB250904) and the Fundamental Research Funds for the Central Universities (No.15CX08003A).

Guar gum fracturing fluid is most widely used fracturing fluid in oilfield, but it needs gel breaking and flowback after fracturing, which causes damage to the formation. The adsorption of gel-breaking solution is an important aspect of formation damage. In this work, hydroxypropyl guar gum (HPG) was selected for determining the concentration of guar gum solution. The adsorption behavior of HPG on the kaolin was studied. The determination method of HPG concentration was established by the similar structure of guar gum and cellulose. The result showed that the adsorption amount of HPG on kaolin was 7.1 mg/g, and the adsorption behavior followed the Langmuir adsorption isotherm. FTIR results showed that the HPG adsorption on kaolin was physical adsorption. XRD characterization confirmed the adsorption of HPG into kaolin inside. In summary, the adsorption of HPG onto kaolin was physical adsorption, inside adsorption and monolayer adsorption. Finally, different influencing factors (temperature, pH, salts, alcohols, polymers) were studied. The results showed that the adsorption of HPG on kaolin increased with the increase of pH value. Desorption amount of HPG on kaolin did not increase with the increase of temperature. MgCl₂ and CaCl₂ decreased the adsorption capacity. NaCl, KCl, Na₂SO₄ and Na₃PO₄ could increase the adsorption capacity, in which KCl had the greatest impact. The addition of monobasic alcohol did not change the amount of adsorption, while polybasic alcohol could increase the amount of adsorption. The addition of the polymer decreased the amount of adsorption.
- Guar gum,
- Kaolin,
- Adsorption amount,
- Adsorption behavior
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