Geological Carbon Sequestration: Experimental Study of the Mechanical Response and Microscopic Mechanism of Shales Subjected to Gaseous CO₂ and ScCO₂

Energy & Fuels, Journal Year: 2025, Volume and Issue: unknown

Published: March 24, 2025

In Carbon Capture and Storage (CCS), a shale formation is regarded as potential geological reservoir that sequesters CO2. The complex interaction between CO2 alters the mechanical behavior structural characteristics of formation, which critical issue for capacity safety sequestration. this study, triaxial compression tests, acoustic emission monitoring, electron microscopy scanning, X-ray diffraction analysis subjected to various infiltration pressures (3, 6, 8, 10, 12, 14 MPa) were conducted. And parameters ringer count gaseous ScCO2 obtained. Based on fractal theory, microstructural features surface porosity quantitatively analyzed. results demonstrate (1) compressive strength infiltrated by was reduced 5.66%; however, reduction rate high 29.75% under ScCO2. This phenomenon mainly dependent strong adsorption dissolution properties (2) timing microfracture expansion in shales advanced, signals have obvious stage during compression. Meanwhile, conditions clustered distribution signals, with significant increase frequency band range rate. (3) microstructure has self-similarity. trend dimension pressure same porosity. study contributes better evaluation storage geologic resource development.

Language: Английский

Optimization of Dye Removal of Cibacron Red Textile Dye From Wastewaters Using Kombucha Scoby With the Taguchi Method

International Journal of Chemical Engineering, Journal Year: 2025, Volume and Issue: 2025(1)

Published: Jan. 1, 2025

This study investigates the removal of azo type is red Cibacron Red textile dye from wastewater using Kombucha Scoby (KS), a form microbial cellulose obtained through fermentation, within field green chemistry. The process was optimized Taguchi method, focusing on effects variables such as pH (2, 6, 10), KS size (0.5, 1.0, 1.5 g), and mixing time (30 min, 2 h, 3.5 h). concentration kept constant at 0.1 g/L, all experiments were conducted with three repetitions two parallel trials. most effective removal, determined method experiments, achieved h 1 g KS. demonstrates adsorption capacity its potential for producing new products this biodegradable nanomaterial, thereby yielding environmentally friendly, sustainable, carbon‐negative materials. pH, size, examined. It observed that variable had greatest impact color removal. morphological characterization efficient experimental setups performed SEM FTIR analyses. analysis detected particles approximately 5 μm in porous structure Furthermore, peak 3340 cm −1 one significant indicators biosorption, suggesting successfully carried out process. results are promising. Microbial bacterial types, KS, which easily produced used industry, can also be reused recycled, possess high industry wastes. will help reduce environmental pollution enable production more biocompatible recyclable products.

Language: Английский

Sand production during hydrocarbon exploitation: mechanisms, factors, prediction, and perspectives

Geoenergy Science and Engineering, Journal Year: 2025, Volume and Issue: unknown, P. 213954 - 213954

Published: May 1, 2025

Language: Английский