Issue Highlights

Abstract

Considerable attention has recently been given to the use of low-cost industrial residues and by-products as adsorbents in pollution control. Blast furnace slag produced during iron-making process can be water-quenched and the rapid cooling results in the formation of water-quenched blast furnace slag. This study investigated the adsorption of reactive dyes onto water-quenched blast furnace slag modifi ed by cetyltrimethyl ammonium bromide surfactant. The migration patterns of dye molecules at slag-water interface were explored. The modifi ed slag showed good effi ciency for removing reactive dyes from water. The results can help achieve the sustainable development for pollution control and energy industry. [1] 1290 Real-Time Feedback Control of SAGD Wells using Model Predictive Control to Optimize Steam Chamber Development under UncertaintyShiv S. Vembadi, Rajan G. Patel, Japan J. Trivedi and Vinay Prasad Intelligent SAGD well operation using model predictive control is proposed for digital oil fi elds. Based on real-time observations from various sensors, a feedback-based multivariable controller optimizes the subcool temperature by manipulating injection/production parameters within the given constraints. The real-time production control framework offsets the effect of geological uncertainties on uniform steam chamber development along the horizontal wellbore. A case study conducted in this research demonstrates the improvement in cumulative steam oil ratio and overall SAGD economics due to effi cient steam utilization and optimal operating strategy. [2] 1382 CFD-PBE-PBE Simulation of an Airlift Loop CrystallizerQian Li, Jingcai Cheng, Chao Yang and Zai-Sha Mao A complete CFD-PBE-PBE coupled model and solver for gas-liquid crystallization systems is developed in the framework of OpenFOAM. It couples multiphase CFD, PBEs of both gas bubbles and crystals, gas-liquid mass transfer and reaction processes. Simulations on an airlift crystallizer are fi rst successfully realized and validated with the formation of CaCO 3 via the reaction of CO 2 with Ca(OH) 2 solution. Effects of operating parameters such as superfi cial gas velocity and inlet concentrations on the processes are generally well predicted. This solver could be extended to other crystallization systems with minor modifi cations, by changing or adding proper models. [3]