IJCST V-12 I-02 2026

International Journal of Chemical Separation Technology
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International Journal of Chemical Separation Technology

IJCST V-12 I-02 2026

IJCST V-12 I-02 2026

Ahead of PrintSubscriptionResearch Article 2026-06-29

Density-Based Separation and Polymer Type Verification of Mixed Post-ConsumerThermoplastic Streams: A Sequential Separation and Contamination Reduction Protocol for Secondary Polymer Supply Chains

By Fernando Jasso Palacio

Abstract: The separation of mixed post-consumer thermoplastic waste streams into polymer-type-specific fractions suitable for industrial reintegration is a fundamental chemical separation challenge in secondary polymer supply chains. Density-based separation, exploiting the characteristic density ranges of common thermoplastic polymers, remains the dominant first-stage separation technique in commercial recycling operations due to its low cost, scalability, and applicability…

PublishedSubscriptionOriginal Research 2026-08-02

Dynamic Matrix Control Versus Nonlinear ModelPredictive Control for the Van de Vusse ContinuousStirred-Tank Reactor: Diagnosing and Correcting aCost-Function Pathology That Masked NMPC’sTrue Performance

By Manish Aggarwal

Abstract: The Van de Vusse reaction in a continuous stirred-tank reactor (CSTR) is a benchmark for nonlinear multivariable control, but its narrow operating envelope creates a trap for nonlinear model predictive control (NMPC): when the setpoint step is small relative to the plant’s reachable range, a standard quadratic NMPC cost function can make zero control action…

Published in International Journal of Chemical Separation Technology · Vol. 12, Issue 02, 2026 · pp. 55–66Read Article →
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