Directed energy and non-noble metal catalysts for sustainable wax production from HDPE

Overview

This innovative technology offers a sustainable method for up-cycling polyolefin waste, specifically HDPE, into high-quality waxes. The process employs novel continuous flow or semi-batch reactors with non-toxic, earth-abundant catalysts to enhance efficiency and product quality. By leveraging directed energy in the form of flow-induced mechanical stress, this method significantly lowers reaction temperatures and avoids the issues associated with uncontrolled thermal radical chemistry. This results in improved product yield and quality while minimizing the production of undesirable by-products such as grease.

Technical specifications

• Catalytic static mixing elements: Designed to improve mass transport and are composed of non-noble metals.
• Advanced reactor design: Incorporates vacuum-assisted product extraction to control wax molecular weight and avoid the use of hydrogen gas.
• Temperature control: Reduces reaction temperatures below 400°C to prevent uncontrolled radical reactions and promote selective dehydrogenation and C-C bond cleavage.
• Materials: Utilizes 3D-printed catalytic elements that quench radicals and enhance heat transfer.
• Product analysis: Employs GCMS, high-temperature GPC, NMR, DSC, and rheology to quantify feedstock and product distributions, informing further design improvements.

Technology readiness level

The current technology readiness level is 3, indicating that the concept has been proven in a laboratory setting. Further development and validation are planned through scalable reactor systems and advanced catalyst designs.