Abstract Accurate prediction of peroxide initiator efficiency in high‐pressure radical polymerization is crucial yet challenging. This study develops a predictive method integrating the decomposition network of peroxide initiator and diffusion dynamics. The decomposition network is constructed using the Reaction Mechanism Generator and refined via Density Functional Theory calculations, while diffusion is described by free volume theory. Key parameters, including diffusion coefficients, rate constants, and radical distances, are incorporated for a comprehensive evaluation. To enhance accuracy, different model parameters are recommended for initiators with varying structures. Validation against experimental data confirms the high accuracy of the method. Additionally, the influence of polymerization pressure on initiator efficiency is elucidated. The method applies to various industrial peroxide initiators and certain non‐peroxide ester initiators, demonstrating broad utility. These findings offer valuable theoretical guidance for initiator design and optimization in industrial free radical polymerization.

Abstract The transformation of PET‐derived ethylene glycol (EG) into valuable chemicals via electrochemical methods holds considerable scientific importance. In this study, organic ligand‐modified PdPb bimetallenes (PdPb O‐BMs) catalysts were synthesized via a one‐pot method. The unique two‐dimensional lamellar nanosheet, combined with n‐octanoic acid modulation and Pb incorporation, enabled efficient conversion of EG into high‐value products, for example, glycolic acid and formate. Pb and n‐octanoic acid coordination cooperatively optimized the electronic structure of Pd to accelerate charge transfer. These findings provided a strategy for designing organic ligand‐modified catalysts, offering a sustainable approach to the value‐added conversion of PET.

Abstract In this work, taking electrochemically mediated atom transfer radical polymerization (eATRP) as an example, the importance of diffusion layer thickness in externally controlled heterogeneous reversible deactivation radical polymerization (RDRP) systems was studied. The diffusion layer thickness was regulated by varying stirring rate and introducing ultrasound, and the diffusion layer thickness under different conditions was determined using linear sweep voltammetry (LSV). The impact of diffusion layer thickness and monomer‐solvent ratio on the kinetics of the polymerization reaction was examined through a combination of theoretical simulations and experimental methods. The results show that employing external mass transfer enhancement techniques, such as ultrasound, can substantially accelerate polymerization in systems with initially thick diffusion layers without adversely affecting the controllability or the quality of the polymer products. This work offers valuable insights into the process intensification of externally controlled heterogeneous RDRP.

Ater publication of Ref. [1], the author became aware of prior, closely related work by Xu et al.[2]. The work by Xu et al. used a more sophisticated model for the impacts on global temperatures of releases of gases with global warming potential than the simplified model in Ref. [1]. Both of these models are useful because they make avoid the significant computational resources required for fully realized global circulation models, making it possible to consider a wide range of scenarios. The publication by Xu et al.[2] reports results for five fluorinated gases, whereas Ref. [1] provides information for a much wider collection of known chemicals with short lived global warming potential. The results of Ref. [1] and Ref. [2] are consistent. Readers interested in the results from Ref. [1] are recommended to also consult the work of Xu et al.[2] for additional insight.

Abstract Microannular rotating bed (MARB) is a newly designed reactor that integrates high‐gravity fields and microscale effects to enable efficient liquid mixing. This study systematically investigated the hydrodynamic and liquid–liquid dispersion characteristics of the MARB, including residence time distribution, liquid holdup, energy dissipation rate, and Sauter mean diameter (d32). Mathematical correlations for predicting these parameters were established. The results showed that the MARB operates with a flow pattern similar to that of a continuous stirred‐tank reactor. Liquid holdup increased linearly with flow rate and decreased with rotational speed, while energy dissipation rate was primarily governed by rotational speed. Notably, the MARB demonstrated excellent liquid–liquid dispersion performance, attaining a minimum d32 of 4.9 μm at a flow rate of 5 L/min, along with improved energy efficiency compared to conventional reactors. With its simple, high‐throughput, and effective design, the MARB offers a highly promising solution for efficient liquid–liquid dispersion in industrial applications.

Abstract A high yield of up to 90% of 2,5‐bis(hydroxymethyl)furan (BHMF) was successfully achieved through the selective hydrogenation of high‐concentration (up to 20 wt%) 5‐hydroxymethylfurfural (HMF) utilizing a novel Ni catalyst supported by renewable carbon under mild reaction conditions (50°C) in an aqueous medium. The superior catalytic performance is attributed to the uniformly dispersed and small‐size Ni nanoparticles, which demonstrated exceptional efficiency in facilitating the hydrogenation of aldehydes and ketones, further highlighting the catalyst's potential for industrial applications.

Abstract This study compares the exergy supplied to a distillation column with the actual energy consumption of a heat pump‐assisted distillation (HPAD) system. It evaluates the reliability of exergy as a proxy for heat pump work demand in such systems. While exergy can serve as a reasonable approximation when the thermal duties of the source and sink are nearly equal, it is not a consistent indicator of heat pump work in general. To address this limitation, we propose the Minimum Heat Pump Work Model, which establishes a theoretical lower bound on the work required to operate a heat pump between a given set of heat sources and sinks. Unlike exergy, this model is based on the direct thermal interaction between the source and sink, independent of the environment. It offers more accurate predictions of heat pump work and provides useful insights for designing energy‐efficient configurations in hybrid and multicomponent distillation systems.

Abstract Maximizing the atom efficiency of noble metal species is crucial for their application, but directly reducing the size down to single atoms (SAs) is limited when facing complex situations requiring the simultaneous adsorption and activation of multiple reactants. Herein, Schiff base condensation of 1,3,5‐tris(4‐aminophenyl)benzene and 2,5‐dibromoterephthalaldehyde offered a Br‐tethered covalent organic framework (COF) TAPB‐DBDH for the co‐loading of ruthenium (Ru) SAs and nanoparticles (NPs). We demonstrated a triadic synergism of Ru SAs (Ru–C3N1), Ru NPs, and the TAPB‐DBDH framework in reductive aminations of carbonyl compounds with ammonia and hydrogen to primary amines, showing the high yield, large turnover number, and turnover frequency, stable recycling, and broad substrate compatibility. A systematic theoretic and experimental study revealed that the cooperation of Ru SAs and the TAPB‐DBDH framework provided a strong affinity toward the carbonyl compound and imine intermediate to promote their conversion, while the co‐existed Ru NPs lowered the energy barrier of H2 cleavage.

Abstract Norbornadiene (NBD) dimer is one of the most important high‐energy‐density fuels for aerospace propulsion, but it is difficult to synthesize with high efficiency. Herein, we fabricated nano‐cobalt loaded alkali‐treated HY zeolite, which significantly promotes the NBD dimerization reaction with a conversion of 73.5% and a selectivity of 84.7%, which is a 20% higher yield than previously reported catalysts. The characterizations confirm that the mild alkali treatment expands the zeolite pore size, providing more reaction space and enhancing the NBD conversion. The in situ Fourier‐transform infrared spectra demonstrate that alkali‐treated zeolites can adsorb more NBD, and the incorporation of Co species enhances the adsorption of double bonds to form a stable transition state with a three‐center two‐electron configuration, thereby promoting the reaction. The dimerization product after hydrogenation has a high density (1.06 g/mL at 20°C) and high volumetric neat heat of combustion (45.3 MJ/L), which is very promising for practical application.