Clay Adsorption Perspective on Petroleum Refining Industry

Emam, Eman A.

doi:10.11648/j.ie.20180201.13

Cited by 8 publications

(1 citation statement)

References 29 publications

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“…Bentonites are used consistently and standardized in animal feed in the form of additives, specific products and compounds [9][10][11]. The role of bentonites in the process of refining and the catalytic cracking of petroleum is well known [12][13][14]. However, one of the most widespread uses is in the drilling of wells during prospecting and the exploration of metallic, non-metallic and gas-petroleum deposits; In these operations, bentonites play a very important role in the lubrication of the drill bit and walls of the well, as well as in the suspension and extraction of the rock debris accumulated at the bottom.…”

Section: Introductionmentioning

confidence: 99%

Bentonite Clays from Southeastern Spain as Sustainable Natural Materials for the Improvement of Cements, Mortars and Concretes

Costafreda,

Martín,

Sanjuán

et al. 2023

Sustainability

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The effects of global climate change are becoming more evident and accelerating at an unprecedented pace. For this reason, human activities urgently need a paradigm shift to stop this entropic process before the consequences become irreversible. In this sense, the use of highly eco-efficient materials aimed at conveniently neutralizing CO2 greenhouse gas emissions entering into the atmosphere can contribute significantly to mitigating and reversing this process. This work aims to demonstrate the positive effects obtained when Portland cement is partially replaced by bentonite clays of volcano-sedimentary origin. The samples were initially characterized by various methods, such as Thin-Section Petrographic Study (TSP) and the analysis of mineral phases with XRD, chemical composition was determined via XRF, and morphological analysis was determined via scanning electron microscopy (SEM). To determine the technical properties of the samples, a qualitative chemical analysis (QCA) was performed, as well as a chemical analysis of pozzolanicity (CAP) at 8 and 15 days, respectively, and a study of the mechanical compressive strengths at 2, 7, 28 and 90 days. Characterization studies using TSP, DRX, FRX and SEM established that these bentonite clays have a complex mineralogical variety, composed mainly of smectite, mordenite, plagioclase and biotite, as well as altered volcanic glass and sericite. The results of the qualitative chemical analysis establish that more than 93% of the SiO2 present in the samples is reactive. Chemical analysis of pozzolanicity (CAP) showed significant pozzolanic behavior in all samples analyzed at both 8 and 15 days, while mechanical tests highlighted significant increases in mechanical strengths, with maximum values varying between 52.2 and 70.6 MPa at 90 days. These results show that the materials can be used as quality pozzolans for the manufacture of cements, mortars and concretes, which could be considered as a favorable factor and, therefore, relevant in the management and control of greenhouse gas emissions responsible for the deterioration of the environment.

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