@article{ahn_wang_kim_you_jung_seong_choi_park_choi_kim_2024, title={Catalyst-recirculating system in steam explosion pretreatment for producing high-yield of xylooligosaccharides from oat husk}, volume={342}, ISSN={["1879-1344"]}, DOI={10.1016/j.carbpol.2024.122411}, journal={CARBOHYDRATE POLYMERS}, author={Ahn, Myeong Rok and Wang, Song and Kim, Jonghwa and You, Sang-Mook and Jung, Chan -Duck and Seong, Hyolin and Choi, June -Ho and Park, Sunkyu and Choi, In-Gyu and Kim, Hoyong}, year={2024}, month={Oct} }
 @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{chen_shetty_wang_nellipudi_aziz_xu_sargsyan_2024, title={Techno-Economic and Environmental Analyses of an Integrated Liquefied Natural Gas/Allam-Fetvedt Cycle/Air Separation Unit Complex}, volume={17}, ISSN={["1996-1073"]}, DOI={10.3390/en17112663}, abstractNote={The natural gas (NG)-powered compressors/engines used in liquified natural gas (LNG) plants are a major source of methane emission. The Allam–Fetvedt cycle (AFC), an oxyfuel, carbon-neutral, high-efficiency power plant, generates pipeline-grade CO2. This work performed novel process modeling, economic analysis, and greenhouse gas emissions analysis for a heat-integrated, electrified LNG/AFC/air separation unit (ASU) complex (LAA), then compared it to standalone LNG and AFC/ASU plants (baseline) as well as an LNG plant electrified with AFC/ASU without heat integration. The low-grade heat generated from compressors of the LNG plant can enhance the AFC net power output by 7.1%. Utilizing the nitrogens cold energy reduces the compressor power requirement by 1.6%. In the integrated LAA complex, not only are GHG emissions avoided, but the energy efficiencies are also improved for both the LNG plant and the AFC power plant. A cash flow analysis of LAA was performed over a 20-year period with 5%, 7%, and 10% discount rates and three levels of LNG prices. The 45Q CO2 credit of USD 85/T as stipulated by the recent Inflation Reduction Act (IRA) of 2022 has been incorporated. The results clearly indicate the economic and environmental benefits of the proposed electrification and heat/power integration.}, number={11}, journal={ENERGIES}, author={Chen, Daniel and Shetty, Pawanahamsa and Wang, Song and Nellipudi, Veeracharyulu and Aziz, Fuad and Xu, Qiang and Sargsyan, Gevorg}, year={2024}, month={Jun} }