Publications by authors named "Penglei Yan"
The selective recycling of mixed plastic wastes with similar structural units is challenging. While heterogeneous catalysis shows potential for selective recycling, challenges such as complex mass transfer at multiphase interfaces and unclear catalytic mechanisms have slowed progress. In this study, a breakthrough in recycling mixed polyester wastes is introduced using heterogeneous photothermal catalysis.
View Article and Find Full Text PDFUpgrading the most difficult-to-recycle waste polyvinyl chloride remains a significant challenge due to the potential formation of highly toxic substances, such as polychlorinated biphenyls. Here, we introduce a paradigm shift with a mild photothermal dechlorination-carbonization process that converts waste polyvinyl chloride plastics into valuable carbon materials. Through detailed techno-economic assessment (TEA) process modeling, based on recycling 96,000 tons of plastics, we demonstrate that utilizing clean solar energy for photothermal conversion can save approximately 2.
View Article and Find Full Text PDFLithium-ion batteries (LIBs) and plastics are pivotal components of modern society; nevertheless, their escalating production poses formidable challenges to resource sustainability and ecosystem integrity. Here, we showcase the transformation of spent lithium cobalt oxide (LCO) cathodes into photothermal catalysts capable of catalyzing the upcycling of diverse waste polyesters into high-value monomers. The distinctive Li deficiency in spent LCO induces a contraction in the Co-O unit cell, boosting the monomer yield exceeding that of pristine LCO by a factor of 10.
View Article and Find Full Text PDFArticle Synopsis
- Hybrid sedimentary rocks (HSR) are important reservoirs in fine-grained sediments, yet their classification and optimal identification methods are unclear due to complex mixing processes.
- This study focuses on the Lucaogou formation in Jimusaer Sag and investigates the microscopic pore structures, revealing five distinct reservoir types that vary based on hydrodynamic conditions and other geological factors.
- It finds that as sediment moves away from the source, the properties of HSR change from higher-quality to lower-quality types, influenced by diagenetic processes like compaction and cementation.
Background Context: In recent years, unilateral biportal endoscopic lumbar interbody fusion (ULIF) has been more and more favored by spinal surgeons because of its advantages of low trauma, rapid recovery, high fusion rate and fewer complications.
Purpose: To compare the clinical effects of ULIF with those of conventional open posterior lumbar interbody fusion (PLIF).
Study Design: Prospective case control study.