PAPER making! g! FROM THE PUBLISHERS OF PAPER TECHNOLOGY INTERNATIONAL ® Volume 11, Number 1, 2025
“Life Cycle Carbon Emissions Accounting of China’s Physical Publishing Industry”, Ruixin Xu, Yongwen Yang, Liting Zhang, Qifen Li, Fanyue Qian, Lifei Song & Bangpeng Xie, Sustainability , 17(4), 1664, 2025. The publishing industry, a major contributor to greenhouse gas emissions, produced approximately 730Mt CO 2 eq globally in 2020 during the paper production phase alone. Unlike other sectors, decarbonization in publishing requires systematic reforms across the supply chain, production efficiency, energy transitions, consumption patterns, and recycling processes, as reliance on renewable energy alone is insufficient. This study focuses on China’s physical publishing industry, developing a comprehensive, high-resolution carbon emissions dataset that spans multiple publication types, stages, and processes. It reveals the emission characteristics across the life cycle, aiming to quantify the emissions accurately and address the lack of life-cycle-based research. This study explores efficient, replicable, and scalable strategies to facilitate the industry’s low -carbon transformation and sustainable development. The findings are as follows. (1) Books are the primary carbon emissions source, contributing approximately 77.05% of the total emissions, while journals and newspapers account for 13.20% and 9.75%, respectively. (2) Annual carbon accounting across the life-cycle identifies paper production and printing as the most carbon-intensive stages, responsible for about 85% of the total emissions. (3) In terms of recycling efforts, carbon reductions of approximately 347,000t CO 2 eq per year can be achieved through measures such as waste paper and plastic packaging recycling, second-hand publication exchanges, and energy recovery from incineration. FILLERS “ Novel Bio-inorganic Composite as a Sustainable Strength Additive and Potential Alternative to Inorganic Fillers for Papermaking ”, Jitendra Kumar, Anuj Kumar, Indrasena Ghosh, Surendra Pal Singh & Chhaya Sharma*, ACS Sustainable Resource Management , Vol 2(2), 2025. This study explores the development and characterization of a novel bio-inorganic composite filler containing precipitated calcium carbonate (PCC) and regenerated cellulose (RC) derived from pineapple crown waste for papermaking. Hand sheets containing modified precipitated calcium carbonate (MdPCC) exhibited significant improvements in tensile strength (up to 68.21% increase at 15% of 20% MdPCC loading), burst index (up to 10.51kg/cm 2 ), burst factor (up to 95.50), and double fold (263 – 3383 at 25% of 20% MdPCC loading) compared to control paper. This exceptional improvement in double fold is attributed to MdPCC’s ability to facilitate stress transfer between paper fibers, leading to a more even distribution of stress and enhanced fold resistance. RC containing different dosages of PCC were characterized by different analytical techniques in order to evaluate the effective retention of the PCC into RC and paper matrix subsequently. PCC alone causes a decrease in the strength of the paper; hence, the proposed filler may overcome this drawback. This study provides the alternative pathway to replace the high dosage of inorganic filler along with no compromise in the strength properties of the paper. MOULDED PULP “Numerical simulation of heat and moisture transfer in microwave drying of molded pulp products”, Lingbo Kong, Ziliang Zhang & Yuejin Yuan, Drying Technology , Vol.43(4), pp.738-752, 2025. To understand the spatial and temporal evolution of temperature and moisture during microwave drying of molded pulp products (MPP), a three- dimensional transient model that couples electromagnetic, heat and mass transfer was developed. The coefficient of determination between the simulated and measured moisture content was greater than 0.963, indicating good qualitative agreement existed. This work analyzed the distributions of the electric field, temperature field, and moisture field. Furthermore, the effects of varying microwave power densities on MPP drying were
Technical Abstracts
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