Fig. 3: In situ study of HDPE conversion by SVUV-PIMS. | Nature Chemical Engineering

Fig. 3: In situ study of HDPE conversion by SVUV-PIMS.

From: Closed-loop recycling of polyethylene to ethylene and propylene via a kinetic decoupling–recoupling strategy

Fig. 3: In situ study of HDPE conversion by SVUV-PIMS.

a, Schematic setup for the transformation of 1-butene during PE-d4 cracking. b, Transformation of 1-butene during PE and PE-d4 conversion in a two-stage reactor. The mass spectrum in the m/z range of 26–50 from the PE-d4 + C4H8 system is zoomed in. Reaction conditions: 80 mg PE or PE-d4 and 10 mg LSP-Z100 at stage I, 30 mg of P-HZSM-5 at stage II; reaction temperature, 260 °C (stage I), 540 °C (stage II); 1.5% C4H8/N2 flow rate, 10 sccm; ionization energy 11 eV. c, Schematic setup for the temperature-programmed reactions (TPR) of 1-butene on P-HZSM-5. d–f, TPR of 1-butene over P-HZSM-5 in a single-stage reactor. Reaction conditions: P-HZSM-5, 30 mg; reaction temperature, ramp from 50 °C to 400 °C at a rate of 100 °C min−1; 1.5% C4H8/N2 flow rate, 20 sccm; ionization energy 11 eV.

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