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Comparing the climate impact of methanol production in Europe: Steam methane reforming vs. Plastic waste gasification processes
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LCA comparing methanol production via steam methane reforming vs. plastic waste gasification; up to 2 kg CO2e/kg reduction possible.
This study compares the climate change impacts of three methanol production processes: the conventional method via steam methane reforming, and two alternatives – gasiforming and electriforming – which utilize plastic waste as feedstock. A gate-to-gate LCA approach is employed, considering credits and substitution impacts for avoiding traditional end-of-life treatment of plastic waste. Influential local parameters for GWP reduction are identified to include electricity carbon footprint, waste treatment infrastructure, incinerator efficiency, and the utilization of captured CO2 streams. Regional conditions are found to be crucial, as demonstrated by a case study comparing technology choices among EU27+3 countries. The study concludes that the novel plastic waste treatment and methanol production processes, have the potential to mitigate climate change impact, particularly when diverting plastic waste from incineration. With carbon-neutral electricity and avoided incineration, the specific impact reduction in methanol production can reach 2 kg CO2e per kg methanol.
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Exploring the potential of chemical recycling using a distributed model in the UK – A life cycle assessment perspective
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Researchers conducted a life cycle assessment of small-scale, decentralized pyrolysis plants converting mixed plastic waste into naphtha in the UK, finding that chemical recycling reduces climate change impacts by up to 2,977 kg CO2-equivalent per tonne compared to virgin plastic production. While promising as a complement to mechanical recycling for complex waste streams, the study notes ongoing challenges with by-product environmental impacts and the need for policy support.
Carbon footprint of CO2-based polypropylene via methanol-to-olefins route
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This study used life cycle assessment to show that polypropylene produced from captured CO2 via power-to-X technology is a net carbon sink (-0.64 kg CO2e per kg), emitting 2.27 kg CO2e less than conventional petrochemical polypropylene, though high electricity demand for water electrolysis remains the key emissions bottleneck.
Advancing Sustainable Energy: Environmental and Economic Assessment of Plastic Waste Gasification for Syngas and Electricity Generation Using Life Cycle Modeling
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Researchers conducted a life cycle and economic assessment of gasifying plastic waste into syngas for electricity generation, finding that solar-powered gasification cuts climate impact by 44% and that a 50-ton-per-day plant can achieve a 2-year payback period with a net present value of $5.32 million over 20 years.
Life cycle assessment of plastic waste and energy recovery
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Researchers investigated the vertical distribution of microplastics in open ocean water columns at stations across the North Atlantic, finding that particle concentrations were highest in subsurface waters rather than the surface mixed layer. Biofouling and association with marine snow were identified as mechanisms driving downward flux of buoyant polymers in the water column.
Life cycle impact assessment of hydrogen production from plastic waste polymers
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This study presents a comparative life cycle assessment of six pathways for producing and transporting hydrogen from plastic waste, finding that waste polymer gasification combined with carbon capture and storage and liquid organic hydride transport consistently delivers the lowest environmental impact compared to conventional steam methane reforming.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.