Ethanol Dehydration Using Corn Grits Molecular Sieve Adsorption Drying in Fuel Ethanol Production

Abstract

Ethanol dehydration is a crucial stage in fuel ethanol production, as the presence of residual water significantly affects fuel quality, combustion efficiency, storage stability, and compliance with industrial fuel standards. The present study investigates the application of corn grits molecular sieve adsorption drying for efficient ethanol dehydration in biofuel production systems. The research focuses on the adsorption characteristics, moisture removal efficiency, regeneration capability, and operational performance of corn grit-based molecular sieve materials under varying process conditions. Experimental analysis demonstrates that the porous structure and hygroscopic properties of modified corn grits enable selective water adsorption from ethanol–water mixtures, resulting in enhanced ethanol purity and reduced energy consumption compared with conventional distillation methods. The influence of adsorption temperature, contact time, ethanol concentration, and bed configuration on dehydration efficiency is systematically evaluated to determine optimal operating parameters. Results indicate that adsorption performance improves significantly with controlled thermal conditions and optimized particle size distribution, contributing to higher dehydration rates and improved process stability. Furthermore, the renewable and biodegradable nature of corn grit adsorbents offers an environmentally sustainable alternative to synthetic molecular sieves while reducing production costs and agricultural waste disposal concerns. Comparative assessment with traditional dehydration technologies reveals promising potential for industrial-scale implementation in sustainable fuel ethanol manufacturing.