RSC sustainability最新文献

{"title":"Environmental and life cycle assessment of lithium carbonate production from Chilean Atacama brines†","authors":"Zijing He, Anna Korre, Geoff Kelsall, Zhenggang Nie and Melanie Colet Lagrille","doi":"10.1039/D4SU00223G","DOIUrl":"https://doi.org/10.1039/D4SU00223G","url":null,"abstract":"<p >The exponentially growing market for lithium-ion batteries (LIBs) is driving the development of more environmentally benign processes for producing lithium carbonate, a key precursor. Extracting lithium(<small>I</small>) from brine is a cost-effective method, particularly in the Lithium Triangle in South America, including the Atacama Desert in Chile. Life cycle assessment (LCA) was used to assess the environmental impacts of lithium(<small>I</small>) production by establishing a comprehensive life cycle inventory (LCI) with data from modelling, literature, technical reports and the Ecoinvent database. Information about evaporation rates from Atacama salars, the performance of the northern Chile electrical grid fuel mix and present waste management processes were analysed to establish the water balance, water footprint (WF), water scarcity footprint (WSF) and to estimate in Aspen Plus and Sphera the environmental performance of the battery-grade lithium carbonate production process. The results predicted significant environmental impacts associated with production of input chemicals such as sodium hydroxide (NaOH) and sodium carbonate (Na<small>₂</small>CO<small>₃</small>), as well as with energy conversion from the carbon intensive electrical supply in northern Chile. The waste dumps and surface impoundments required for the production process did not result in significant leachate infiltration, although considerable land areas are occupied. The modelling and analysis results highlighted the importance of accurate brine evaporation rates on the process water balance estimation and on the conventional manufacturing process emissions; insufficient evaporation rates increased the water footprint of chemical production processes. The water resource stress in the arid Atacama region was evident from predicted water balances, WFs and WSFs, emphasising the necessity to innovate less time-consuming and water-conserving processes to increase sustainability.</p>","PeriodicalId":74745,"journal":{"name":"RSC sustainability","volume":" 1","pages":" 275-290"},"PeriodicalIF":0.0,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/su/d4su00223g?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142994185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cost-motivated pathways towards near-term decarbonization of the cement industry†","authors":"Katelyn M. Ripley, Fadl H. Saadi and Zara L'Heureux Burke","doi":"10.1039/D4SU00590B","DOIUrl":"https://doi.org/10.1039/D4SU00590B","url":null,"abstract":"<p >Cement production facilities contribute over 8% of global carbon dioxide (CO<small>₂</small>) emissions, with approximately 60% of these emissions stemming from process-related activities and the remaining 40% from energy consumption. This unique emission profile means that merely decarbonizing the energy source will be insufficient to achieve net-zero emissions for this sector. Recognizing the hard-to-decarbonize nature of the cement industry, this perspective investigates the costs associated with implementing retrofit decarbonization options at existing cement facilities to expedite emissions reduction. We evaluate the impact of clinker replacement, alternative fuels, point source capture, and direct air capture on both total CO<small>₂</small> emissions and cement production costs. After validating the emissions and costs for baseline cement production and each decarbonization strategy, we develop dispatch curves (a method to sequentially compare costs and removal capacities across available technologies) to identify the most cost-effective pathways to achieve net-zero emissions. Through this analysis, we reveal that utilizing all four decarbonization strategies is potentially the most cost effective and can facilitate a net-zero future for the cement industry with a 29% increase in cement costs. We also explore deployment strategies and tailored solutions for individual facilities. This work builds on substantial progress in the field by analyzing the combined potential of these sustainable technologies to help the industry meet its decarbonization goals.</p>","PeriodicalId":74745,"journal":{"name":"RSC sustainability","volume":" 1","pages":" 255-263"},"PeriodicalIF":0.0,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/su/d4su00590b?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142994183","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exsolved LaNiRuO3 perovskite-based catalysts for CO2 methanation reaction†","authors":"Ayesha A. Alkhoori, Eswaravara Prasadarao Komarala, Aasif A. Dabbawala, Aseel G. S. Hussien, Dalaver H. Anjum, Samuel Mao and Kyriaki Polychronopoulou","doi":"10.1039/D4SU00410H","DOIUrl":"https://doi.org/10.1039/D4SU00410H","url":null,"abstract":"&lt;p &gt;Hydrogenation of CO&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt; for methane formation is one of the thermodynamically favorable processes for reducing atmospheric CO&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt; emissions. The present work demonstrates the synthesis and evaluation of LaNiRuO&lt;small&gt;&lt;sub&gt;3&lt;/sub&gt;&lt;/small&gt; perovskite-derived catalysts for CO&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt; methanation in both supported and unsupported (bulk) forms. Specifically, two catalysts were prepared: (i) a Ru-substituted LaNiO&lt;small&gt;&lt;sub&gt;3&lt;/sub&gt;&lt;/small&gt; perovskite, LaNi&lt;small&gt;&lt;sub&gt;0.9&lt;/sub&gt;&lt;/small&gt;Ru&lt;small&gt;&lt;sub&gt;0.1&lt;/sub&gt;&lt;/small&gt;O&lt;small&gt;&lt;sub&gt;3&lt;/sub&gt;&lt;/small&gt;, with 10 at% Ru and (ii) a supported version (30% LaNi&lt;small&gt;&lt;sub&gt;0.9&lt;/sub&gt;&lt;/small&gt;Ru&lt;small&gt;&lt;sub&gt;0.1&lt;/sub&gt;&lt;/small&gt;O&lt;small&gt;&lt;sub&gt;3&lt;/sub&gt;&lt;/small&gt;/Al&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;O&lt;small&gt;&lt;sub&gt;3&lt;/sub&gt;&lt;/small&gt;). The catalysts were synthesized through controlled reduction conditions, and they were thoroughly characterized, before and after the exsolution process, using XRD, TEM, XPS, BET, H&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;-TPR, and H&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;-TPD techniques. The characterization results indicated that the exsolved LaNi&lt;small&gt;&lt;sub&gt;0.9&lt;/sub&gt;&lt;/small&gt;Ru&lt;small&gt;&lt;sub&gt;0.1&lt;/sub&gt;&lt;/small&gt;O&lt;small&gt;&lt;sub&gt;3&lt;/sub&gt;&lt;/small&gt;/Al&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;O&lt;small&gt;&lt;sub&gt;3&lt;/sub&gt;&lt;/small&gt; catalyst formed small Ni particles (∼6 nm), resulting in better dispersion (18%) while maintaining a high surface area (141 m&lt;small&gt;&lt;sup&gt;2&lt;/sup&gt;&lt;/small&gt; g&lt;small&gt;&lt;sup&gt;−1&lt;/sup&gt;&lt;/small&gt;) and porosity. This catalyst demonstrated a 10% higher CO&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt; conversion (77%) at a temperature lower by 50 °C (&lt;em&gt;i.e.&lt;/em&gt; 400 °C) than the exsolved bulk LaNi&lt;small&gt;&lt;sub&gt;0.9&lt;/sub&gt;&lt;/small&gt;Ru&lt;small&gt;&lt;sub&gt;0.1&lt;/sub&gt;&lt;/small&gt;O&lt;small&gt;&lt;sub&gt;3&lt;/sub&gt;&lt;/small&gt; perovskite. Both catalysts exhibited over 90% selectivity for CH&lt;small&gt;&lt;sub&gt;4&lt;/sub&gt;&lt;/small&gt; in the 250–450 °C range. The enhanced catalytic performance of the exsolved LaNi&lt;small&gt;&lt;sub&gt;0.9&lt;/sub&gt;&lt;/small&gt;Ru&lt;small&gt;&lt;sub&gt;0.1&lt;/sub&gt;&lt;/small&gt;O&lt;small&gt;&lt;sub&gt;3&lt;/sub&gt;&lt;/small&gt;/Al&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;O&lt;small&gt;&lt;sub&gt;3&lt;/sub&gt;&lt;/small&gt; catalyst was attributed to the small Ni particle size, better dispersion, and the alumina support's high surface area and basic properties, facilitating the adsorption and dissociation of H&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt; and CO&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;. Further long-term stability tests at 400 °C and 25 000 mL g&lt;small&gt;&lt;sup&gt;−1&lt;/sup&gt;&lt;/small&gt; h&lt;small&gt;&lt;sup&gt;−1&lt;/sup&gt;&lt;/small&gt; (WHSV) over 54 h revealed that the exsolved LaNi&lt;small&gt;&lt;sub&gt;0.9&lt;/sub&gt;&lt;/small&gt;Ru&lt;small&gt;&lt;sub&gt;0.1&lt;/sub&gt;&lt;/small&gt;O&lt;small&gt;&lt;sub&gt;3&lt;/sub&gt;&lt;/small&gt;/Al&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;O&lt;small&gt;&lt;sub&gt;3&lt;/sub&gt;&lt;/small&gt; catalyst maintained a 70% CO&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt; conversion, with the CH&lt;small&gt;&lt;sub&gt;4&lt;/sub&gt;&lt;/small&gt; yield and selectivity above 60% and 95%, respectively. Thus, supporting the perovskite catalyst on Al&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;O&lt;small&gt;&lt;sub&gt;3&lt;/sub&gt;&lt;/small&gt; demonstrated a pronounced effect on the CO&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt; conversion rate and CH&lt;small&gt;&lt;sub&gt;4&lt;/sub","PeriodicalId":74745,"journal":{"name":"RSC sustainability","volume":" 12","pages":" 3866-3878"},"PeriodicalIF":0.0,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/su/d4su00410h?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142736726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Correction: Hydrothermal synthesis of ZnZrOx catalysts for CO2 hydrogenation to methanol: the effect of pH on structure and activity","authors":"Issaraporn Rakngam, Gustavo A. S. Alves, Nattawut Osakoo, Jatuporn Wittayakun, Thomas Konegger and Karin Föttinger","doi":"10.1039/D4SU90059F","DOIUrl":"10.1039/D4SU90059F","url":null,"abstract":"<p >Correction for ‘Hydrothermal synthesis of ZnZrO<small>_<em>x</em></small> catalysts for CO<small>₂</small> hydrogenation to methanol: the effect of pH on structure and activity’ by Issaraporn Rakngam <em>et al.</em>, <em>RSC Sustain.</em>, 2024, https://doi.org/10.1039/d4su00522h.</p>","PeriodicalId":74745,"journal":{"name":"RSC sustainability","volume":" 12","pages":" 4061-4061"},"PeriodicalIF":0.0,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11563206/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142649935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cu–Mg synergy enhanced synthesis of methyl formate over noble metal-free heterogeneous catalyst systems†","authors":"Jyotishman Kaishyop, Arpan Mukherjee, Abhay Giri Goswami, Tuhin Suvra Khan and Ankur Bordoloi","doi":"10.1039/D4SU00478G","DOIUrl":"https://doi.org/10.1039/D4SU00478G","url":null,"abstract":"<p >To address the challenges associated with storage and transportation of hydrogen, Liquid Organic Hydrogen Carriers (LOHCs) like methyl formate (MF) offer a promising and sustainable solution for storing hydrogen (8.4% wt) under ambient conditions. The conversion of anthropogenic CO<small>₂</small> to MF in the presence of methanol, under base-free conditions, is attracting significant research attention, as it not only helps to limit the atmospheric CO<small>₂</small> but also produces MF as an efficient LOHC. In this study, a supported Cu nanocatalyst was synthesized, demonstrating notable activity for CO<small>₂</small> hydrogenation to MF, achieving a CO<small>₂</small> conversion of 14.01%, a turnover frequency (TOF) of 186 h<small>⁻¹</small>, and selectivity greater than 99%. These results represent the highest performance reported among noble-metal-free catalyst systems. The Cu–Mg synergy enhanced catalytic activity was thoroughly investigated in the quest for improved activity. Comprehensive characterization studies were conducted to elucidate the structure–activity relationship, and the catalyst exhibited consistent performance in recycling and long-term experiments. Additionally, a plausible reaction mechanism for the catalytic process has been proposed.</p>","PeriodicalId":74745,"journal":{"name":"RSC sustainability","volume":" 12","pages":" 3835-3845"},"PeriodicalIF":0.0,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/su/d4su00478g?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142736707","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Aqueous-mediated DABCO and DABCO-ionic liquid catalysed synthesis of 3-acetylcoumarins: exploration by kinetic, electrochemical and spectroscopic studies","authors":"Arpita A. Shanbhag, Lokesh A. Shastri and Samundeeswari L. Shastri","doi":"10.1039/D4SU00465E","DOIUrl":"https://doi.org/10.1039/D4SU00465E","url":null,"abstract":"<p >A more efficient, green and user-friendly approach for the synthesis of a combinatorial library of 3-acetylcoumarins from easily available ethylacetoacetate (EAA) and <em>o</em>-hydroxyaldehydes in water at room temperature was developed with excellent yields by modifying novel methods. The experimental method is facile and more economical than traditional methods, requiring no further product purification. Furthermore, the experimental conditions were optimized at the gram scale. The catalyst was reusable, resulting in excellent yields in a shorter time. Additionally, the by-product ethanol formed in the reaction was distilled out. Interestingly, the use of DABCO, DABCO-ionic liquids and DABCO salts as catalysts yielded excellent results (95–98%) in a shorter time. All products were identified by comparing their physical and spectroscopic data. The versatility of the developed green approach encouraged us to investigate the kinetics of the slowest step in the reaction and arrive at a rate law for the reaction. The kinetic and thermodynamic experimental results prompted us to undertake spectroscopic studies, including IR and <small>¹</small>H NMR, which demonstrated that the catalyst initiated the mechanism. Additionally, cyclic voltammetry (CV), a key electroanalytical tool, showed both the spontaneity of the reaction and the tautomerism of EAA.</p>","PeriodicalId":74745,"journal":{"name":"RSC sustainability","volume":" 12","pages":" 4008-4027"},"PeriodicalIF":0.0,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/su/d4su00465e?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142736737","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Unraveling the mechanism of the CO2-assisted oxidative dehydrogenation of propane over VOx/CeO2: an operando spectroscopic study†","authors":"Leon Schumacher, Marius Funke and Christian Hess","doi":"10.1039/D4SU00527A","DOIUrl":"https://doi.org/10.1039/D4SU00527A","url":null,"abstract":"<p >The CO<small>₂</small>-assisted oxidative dehydrogenation (ODH) of propane is of great interest for the usage of CO<small>₂</small> in chemical industry. Vanadia-based catalysts are a promising material class, which can replace highly toxic CrO<small>_<em>x</em></small>, the current state-of-the-art catalyst. Ceria is a commonly used support material in CO<small>₂</small> activation but has not yet been used as a vanadia support for CO<small>₂</small>-assisted propane ODH. In this study, we address the interplay between vanadia and ceria as well as the nuclearity-dependent reaction behavior of VO<small>_<em>x</em></small>/CeO<small>₂</small> catalysts using XRD, multi-wavelength Raman, UV-Vis, and diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS). While the vanadia loading increases the selectivity, the catalysts exhibit a significant amount of side reactions, including most prominently the total oxidation over bare ceria on surface oxygen sites due to their high reducibility and propane dry reforming (PDR) over catalysts with high vanadia loading. Mechanistic analysis reveals that dimers can transfer hydrogen from propane to the ceria lattice, forming Ce–H or to a monodentate carbonate, facilitating the reverse water–gas shift reaction (RWGSR), whereas a transfer to bridged Ce–OH surface species leads to total oxidation due to the high reactivity of the formed surface species. Oligomers facilitate PDR due to their high reducibility and the active oxygen site shifts from ceria to vanadia. The catalyst can be regenerated <em>via</em> carbonates, which are highly stable and can subsequently deactivate the catalyst surface. Our results highlight the benefit of applying multiple <em>operando</em> spectroscopies to enhance the mechanistic understanding of materials relevant for CO<small>₂</small> activation and further the knowledge-based optimization of catalytic performance.</p>","PeriodicalId":74745,"journal":{"name":"RSC sustainability","volume":" 12","pages":" 3846-3865"},"PeriodicalIF":0.0,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/su/d4su00527a?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142736708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mechanically processed Sardinian wool promotes C–C bond synthesis under solvent-free conditions†","authors":"Sourav Behera, Federico Cuccu, Francesco Basoccu, Stefano Barranco and Andrea Porcheddu","doi":"10.1039/D4SU00503A","DOIUrl":"https://doi.org/10.1039/D4SU00503A","url":null,"abstract":"<p >The tangible environmental concerns of the last few decades are prompting science to a new sustainable paradigm for chemical reactions and a circular economy. In the present manuscript, complying with this dichotomy, Sardinian wool is presented as a promising material for organic synthesis. Aldol and nitro-aldol additions, and Knoevenagel reactions were demonstrated with high efficiency under wool-promoted and solvent-free conditions, paving the way to novel approaches for converting wool biomass waste into value-added products for C–C bond formation.</p>","PeriodicalId":74745,"journal":{"name":"RSC sustainability","volume":" 1","pages":" 376-382"},"PeriodicalIF":0.0,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/su/d4su00503a?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142994152","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The engineering of CO2 hydrogenation catalysts for higher alcohol synthesis","authors":"Angie F. J. Tan, Muhammad Dody Isnaini, Muenduen Phisalaphong and Alex C. K. Yip","doi":"10.1039/D4SU00497C","DOIUrl":"https://doi.org/10.1039/D4SU00497C","url":null,"abstract":"<p >Anthropogenic CO<small>₂</small> emissions have drawn significant attention in recent years. Using CO<small>₂</small> as feedstock for chemical processes has become a key solution in overall closed carbon cycles for a vision of a circular carbon economy. CO<small>₂</small> hydrogenation to higher alcohols has emerged as one of the most promising CO<small>₂</small> conversion pathways for mitigating CO<small>₂</small> emissions and producing value-added chemicals. The present review critically discusses the most recent cutting-edge catalyst development in higher alcohol synthesis (HAS), focusing on the influence of different metals, promoters, and supports according to the contributions of different active species in modern catalyst configurations. Particularly, the critical roles of oxygen vacancies and the reaction mechanisms shed light on the rational design of the next-generation CO<small>₂</small> hydrogenation catalysts.</p>","PeriodicalId":74745,"journal":{"name":"RSC sustainability","volume":" 12","pages":" 3638-3654"},"PeriodicalIF":0.0,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/su/d4su00497c?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142736767","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Beyond waste: cellulose-based biodegradable films from bio waste through a cradle-to-cradle approach","authors":"Mai N. Nguyen, Minh T. L. Nguyen, Marcus Frank and Dirk Hollmann","doi":"10.1039/D4SU00613E","DOIUrl":"https://doi.org/10.1039/D4SU00613E","url":null,"abstract":"<p >The basis of circular economy is the use and valorization of renewable raw materials. Especially in developing countries, crop waste such as straw and rice straw have high potential for further utilization. Within this report, we present a holistic strategy including the selective isolation of cellulose <em>via</em> simple, environmental benign two-step process. Rice straw was easily dissolved in a non-derivatizing electrolyte solvent such as aqueous solution of tetrabutylphosphonium hydroxide (TBPH) (50 wt%) at room temperature followed by precipitation in water. Quantitative amount of raw cellulose was recovered within a short period of time without heating or cooling enabling a further application of biomass material. The structure and characterization of the raw cellulose were investigated by nuclear magnetic resonance (NMR), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and by scanning (SEM) and transmission electron microscopy (TEM). This method could be an excellent alternative to the current extraction methods such as the KRAFT process. Indeed, the same chemicals as for the isolation can be used to prepare regenerated cellulose film of high purity with the raw cellulose. Due to its sustainability and exceptional biodegradability, these films have a great potential for applications in environment, textile, and separation industry. No modification of the cellulose during the extraction and preparation process occurs thus, these films are no plastics and thus can be used without regulations. In general, a full “circular economy” process is provided: valuable raw materials (cellulose) are recovered selectively from natural resources such as rice straw and further to enable products with high applicability in life (cellulose packaging film). The cradle-to-cradle process is closed by fast biodegradation of the used products.</p>","PeriodicalId":74745,"journal":{"name":"RSC sustainability","volume":" 12","pages":" 4028-4035"},"PeriodicalIF":0.0,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/su/d4su00613e?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142736720","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}