@article{park_yoo_cho_park_cruz_kelley_park_2024, title={Exploring potential of cellulose acetate sulfate films for sustainable packaging: tuning characteristics via sulfate group variation}, volume={1}, ISSN={["1572-882X"]}, DOI={10.1007/s10570-023-05713-8}, journal={CELLULOSE}, author={Park, Seonghyun and Yoo, Seunghyun and Cho, Seong-Min and Park, Hyeonji and Cruz, David and Kelley, Stephen S. and Park, Sunkyu}, year={2024}, month={Jan} } @article{lan_cruz_li_boakye_park_tiller_mittal_johnson_park_yao_2024, title={Life-Cycle Assessment of Sustainable Aviation Fuel Derived from Paper Sludge}, volume={12}, ISSN={["2168-0485"]}, url={https://doi.org/10.1021/acssuschemeng.4c00795}, DOI={10.1021/acssuschemeng.4c00795}, abstractNote={Converting waste paper sludge to sustainable aviation fuel (SAF) offers a circular economy strategy to decarbonize the aviation sector. This study develops a life-cycle assessment (LCA) for converting high-ash paper sludge to SAF in the U.S. using a catalytic sugar upgrading system that consists of ash removal, enzymatic hydrolysis, dehydration, aldol condensation, and hydroprocessing. The LCA is coupled with a process simulation for an industrial-scale biorefinery based on experimental data. We quantified the carbon intensity as 35.7–41.8 gCO2eq MJ–1 SAF (−636 to −584 gCO2eq per dry kg paper sludge) with acetone as a solvent, renewable fuel, and biobased chemicals; this is further reduced to 5.1–11.1 gCO2eq MJ–1 (−925 to −873 gCO2eq per dry kg paper sludge) if ash is recycled and used for substituting cement. Converting 1 dry kg paper sludge to SAF with acetone, renewable fuel, and biobased chemicals (−925 to −584 gCO2eq) is more climate beneficial than landfilling without landfill gas recovery (791 gCO2eq) and with landfill gas recovery (−294 gCO2eq). More than 330 million gallons of SAF can be produced annually (>4 million dry t paper sludge/year in the U.S.), resulting in a reduction of 2–7 million tCO2eq.}, number={22}, journal={ACS SUSTAINABLE CHEMISTRY & ENGINEERING}, author={Lan, Kai and Cruz, David and Li, Jinyue and Boakye, Amma Asantewaa Agyei and Park, Hyeonji and Tiller, Phoenix and Mittal, Ashutosh and Johnson, David K. and Park, Sunkyu and Yao, Yuan}, year={2024}, month={Apr}, pages={8379–8390} } @article{tiller_park_cruz_carrejo_johnson_mittal_venditti_park_2024, title={Techno-economic analysis of biomass value-added processing informed by pilot scale de-ashing of paper sludge feedstock}, volume={401}, ISSN={["1873-2976"]}, url={http://dx.doi.org/10.1016/j.biortech.2024.130744}, DOI={10.1016/j.biortech.2024.130744}, abstractNote={Paper sludge biomass represents an underutilized feedstock rich in pulped and processed cellulose which is currently a waste stream with significant disposal cost to industry for landfilling services. Effective fractionation of the cellulose from paper sludge presents an opportunity to yield cellulose as feedstock for value-added processes. A novel approach to cellulose fractionation is the sidehill screening system, herein studied at the pilot-plant scale. Composition analysis determined ash removal and carbohydrate retention of both sidehill and high-performance benchtop screening systems. Sidehill screening resulted in greater carbohydrates retention relative to benchtop screening (90% vs 66%) and similar ash removal (95% vs 98%). Techno-economic analysis for production of sugar syrup yielded a minimum selling price of $331/metric ton of sugar syrup including disposal savings, significantly less than a commercial sugar syrup without fractionation. Sensitivity analysis showed that screening conditions played a significant role in economic feasibility for cellulosic yield and downstream processes.}, journal={BIORESOURCE TECHNOLOGY}, author={Tiller, Phoenix and Park, Hyeonji and Cruz, David and Carrejo, Edgar and Johnson, David K. and Mittal, Ashutosh and Venditti, Richard and Park, Sunkyu}, year={2024}, month={Jun} } @article{xu_rios_wang_ham_choi_kim_park_2024, title={Process design and techno-economic analysis for the lignin oil solvent recovery and purification process}, volume={434}, ISSN={["1879-1786"]}, url={http://dx.doi.org/10.1016/j.jclepro.2023.139999}, DOI={10.1016/j.jclepro.2023.139999}, abstractNote={A technology to extract lignin oil from pretreated biomass has been developed for a cosmetic additive application (i.e., UV protection) through isopropyl alcohol without any catalyst. It was used for co-product lignin oil with XOS from a biorefinery process in this study. One of the key factors impacting economic feasibility is extraction solvent recovery, and it is important to design the process details based on techno-economic analysis. Therefore, this study has integrated lab experiments, process designs with Aspen Plus process simulations, and Excel-based techno-economic analysis to investigate the effect of solvent recovery on overall economics. Three options for solvent recovery (e.g., distillation, salting-out, and molecular sieve) have been explored. The salting-out method showed the best economic performance with an IRR of 33.6%, while the distillation method was 21.7% and the molecular sieve method was 16.7%. Key parameters are also identified by sensitivity analyses, which indicate the improvement potential for each case. This study has laid a foundation for lignin oil production studies, but its concept and approach can be applied to any solvent recycling in a biorefinery process, which is often neglected in lab-scale biorefinery studies.}, journal={JOURNAL OF CLEANER PRODUCTION}, author={Xu, Yiling and Rios, David Cruz and Wang, Song and Ham, Choonghyun and Choi, June-Ho and Kim, Hoyong and Park, Sunkyu}, year={2024}, month={Jan} } @article{sarder_piner_rios_chacon_artner_barrios_argyropoulos_2022, title={Copolymers of starch, a sustainable template for biomedical applications: A review}, volume={12}, url={http://dx.doi.org/10.1016/j.carbpol.2021.118973}, DOI={10.1016/j.carbpol.2021.118973}, abstractNote={The outstanding versatility of starch offers a source of inspiration for the development of high-performance-value-added biomaterials for the biomedical field, including drug delivery, tissue engineering and diagnostic imaging. This is because starch-based materials can be tailored to specific applications via facile grafting or other chemistries, introducing specific substituents, with starch being effectively the "template" used in all the chemical transformations discussed in this review. A considerable effort has been carried out to obtain specific tailored starch-based grafted polymers, taking advantage of its biocompatibility and biodegradability with appealing sustainability considerations. The aim of this review is to critically explore the latest research that use grafting chemistries on starch for the synthesis of products for biomedical applications. An effort is made in reviewing the literature that proposes synthetic "greener" approaches, the use of enzymes and their immobilized analogues and alternative solvent systems, including water emulsions, ionic liquids and supercritical CO2.}, journal={CARBOHYDRATE POLYMERS}, publisher={Elsevier BV}, author={Sarder, Roman and Piner, Emily and Rios, David Cruz and Chacon, Lisandra and Artner, Mirela Angelita and Barrios, Nelson and Argyropoulos, Dimitris}, year={2022}, month={Feb}, pages={118973} } @article{park_cruz_tiller_johnson_mittal_jameel_venditti_park_2022, title={Effect of ash in paper sludge on enzymatic hydrolysis}, volume={165}, ISSN={0961-9534}, url={http://dx.doi.org/10.1016/j.biombioe.2022.106567}, DOI={10.1016/j.biombioe.2022.106567}, abstractNote={The valorization of paper sludge is a high-potential process to develop renewable fuels and chemicals, which can be integrated with pulp and paper mills. Calcium carbonate is the main ash component in sludge, which plays a role in buffering pH and potentially lowering the conversion during enzymatic hydrolysis. Therefore, it is important to investigate the effect of ash on sugar yields and examine pH change to introduce efficient and economical enzymatic hydrolysis of sludge. Carbohydrate conversion was enhanced when the ash was removed by fractionation. On the other hand, the highest sugar recovery was obtained when the sludge contained 20% ash content. The pH change during enzymatic hydrolysis was influenced by ash and explained why sludge-derived hydrolysate showed lower carbohydrate conversion. Therefore, a high shear process with the increased acid amount is suggested to prohibit the negative effect of ash and enhance the accessibility of cellulase to fibers. This study highlights the feasibility of using wet waste streams generated by the paper industry.}, journal={Biomass and Bioenergy}, publisher={Elsevier BV}, author={Park, Hyeonji and Cruz, David and Tiller, Phoenix and Johnson, David K. and Mittal, Ashutosh and Jameel, Hasan and Venditti, Richard and Park, Sunkyu}, year={2022}, month={Oct}, pages={106567} } @article{rodríguez-barona_granada-orozco_cruz-ríos_2014, title={COMPARACIÓN DE SACAROSA, INULINA Y FRUCTO-OLIGOSACÁRIDOS COMO AGENTES OSMÓTICOS EN MORA DE CASTILLA (RUBUS GLAUCUS BENTH.) -COMPARISON OF SUCROSE, INULIN AND FRUCTO-OLIGOSACCHARIDES AS OSMOTIC AGENTS IN THE ANDEAN BLACKBERRY (RUBUS GLAUCUS BENTH.)}, url={http://dx.doi.org/10.17660/actahortic.2014.1016.4}, DOI={10.17660/actahortic.2014.1016.4}, abstractNote={ISHS II International Conference on Postharvest and Quality Management of Horticultural Products of Interest for Tropical Regions COMPARACIÓN DE SACAROSA, INULINA Y FRUCTO-OLIGOSACÁRIDOS COMO AGENTES OSMÓTICOS EN MORA DE CASTILLA (RUBUS GLAUCUS BENTH.) -COMPARISON OF SUCROSE, INULIN AND FRUCTO-OLIGOSACCHARIDES AS OSMOTIC AGENTS IN THE ANDEAN BLACKBERRY (RUBUS GLAUCUS BENTH.)}, journal={Acta Horticulturae}, author={Rodríguez-Barona, S. and Granada-Orozco, J. and Cruz-Ríos, D.}, year={2014}, month={Jan} }