Article
Engineering, Environmental
Jere Elfving, Juho Kauppinen, Mikko Jegoroff, Vesa Ruuskanen, Lauri Jarvinen, Tuomo Sainio
Summary: Comparison of regeneration options for direct air capture shows that using TVSA with air or inert gas purge flow leads to better regeneration efficiency. Lower temperatures result in better regeneration performance, with TVSA coupled with mild vacuum showing lower cyclic capacity decrease rate.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Energy & Fuels
Sang Jun Han, Jung-Ho Wee
Summary: Two CO2 chemical absorption systems using AMP and MEA aqueous solutions were compared in terms of absorption performance and electrical properties. The study found that the absorption capacity in the AMP system increases linearly with C-ini, while the absorption rate in the MEA system is affected by concentration and primary reaction changes. The differences in performance can be attributed to the molecular structures and sizes of the two systems.
Article
Engineering, Chemical
Xiaoshan Li, Ji Liu, Wufeng Jiang, Ge Gao, Fan Wu, Cong Luo, Liqi Zhang
Summary: This study investigates the phase change behavior of phase change absorbents in CO2 capture, finding that a specific DETA/1-propanol/H2O solution ratio can optimize CO2 loading enrichment; additionally, 1-propanol can facilitate phase separation and the reaction between amines and CO2.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Chemical
Takayuki Kushida, Sakurako Wada, Yukio Furukawa
Summary: We developed a thermochemical model to evaluate the CO2 regeneration energies in aqueous solutions of MEA, DEA, AMP, and IPAE. The regeneration heat includes reaction heat, sensible heat, and vaporization heat. We calculated the reaction heat using our model and determined the concentrations of all chemical species in the CO2 absorption and release states. The contribution of protonation reaction is significant in sterically hindered amines AMP and IPAE, while both protonation and carbamate hydrolysis play important roles in MEA and DEA. Sensible heat dominates the regeneration heat compared to reaction and vaporization heats.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Chemistry, Physical
Ionela-Dorina Dumbrava, Calin-Cristian Cormos
Summary: The study conducted a detailed techno-economic analysis of hydrogen production from biogas conversion, showing variations in energy efficiency, carbon capture rate, and cost among different designs. The calcium looping design was identified as the most favorable option.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Thermodynamics
Hossein Farajollahi, Siamak Hossainpour
Summary: This study evaluates the effect of co-combustion of woody biomass and coal on the techno-economic performance of a 300 MWth in-situ gasification chemical looping combustion power plant. The results show that increasing biomass share can enhance the CO2 capture efficiency and coal conversion, achieving negative CO2 emissions with high biomass share. The integrated systems of supercritical CO2 cycle and Organic Rankine cycle improve the net electrical efficiency of the plant.
Article
Thermodynamics
Kun Fu, Mingzhen Zheng, Haijie Wang, Dong Fu
Summary: In our recent study, a mixture of 70 wt% 2-ethylhexan-1-amine (EHA) and 30 wt% diglyme was found to be a promising system for carbon dioxide (CO2) absorption. The study investigated the capture performance of 15 kPa CO2 in different compositions of EHA and diglyme solutions. The proposed sorbents showed low viscosities and higher CO2 desorption capacities compared to aqueous ethanolamine (MEA) solutions. Moreover, the sorbents demonstrated good regeneration efficiency and lower energy consumption for CO2 desorption.
Article
Engineering, Chemical
Xianhang Jin, Jiawei Fang, Qian Ma, Rong Wang, Weidong Zhang
Summary: This study investigates the effect of amine structure on the development of CO2 phase change absorbents (CPCAs) and proposes a development guideline based on amine properties. By adjusting the types of amine and diluent, all amines in this study can be successfully developed as CPCAs. Experimental results show that the developed CPCAs have a 34.4% higher CO2 cyclic capacity compared to the traditional DEA/H2O system.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Environmental
Jiawei Fang, Xianhang Jin, Chunhua Cui, Jianhong Wang, Qing Sun, Weidong Zhang
Summary: CO2 phase change absorbents (CPCAs) have gained increasing interest for their potential energy saving in CO2 capture. The unclear phase separation pattern poses a challenge in efficient CPCAs development. This study investigated the effect of organic solvents properties on the phase separation process. The ion-dipole interaction difference between ion-organic solvent and ion-water was used to explain the phase separation behavior. The relative dielectric constant and ET(30) to water were proposed as indicators for guiding the selection of organic solvents in CPCA. Organic solvents with lower dielectric constant and ET(30) relative to water tend to undergo phase separation and obtain higher ion distribution coefficient. The developed MEA CPCAs showed a larger CO2 cyclic capacity than 30wt.%MEA, with 1,4-dioxane CPCA being 49.0% higher than the benchmark MEA solution.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Hao Peng, Zichen Di, Pan Gong, Fengling Yang, Fangqin Cheng
Summary: A novel double chemical looping process is proposed for the co-production of high purity hydrogen and carbon monoxide. The system achieves high efficiency and economic competitiveness, making it a promising method for hydrogen production.
GREEN ENERGY & ENVIRONMENT
(2023)
Article
Thermodynamics
Carlos Arnaiz del Pozo, Schalk Cloete, Angel Jimenez Alvaro
Summary: Growing concerns about climate change have led to increased interest in alternative energy carriers to fossil fuels. Methanol shows promise as a potential solution for transportation and storage challenges, with an existing infrastructure and scalable synthesis process. This study assesses the techno-economic viability of producing methanol from natural gas and renewable energy with direct air capture (DAC). The results indicate that both natural gas and renewable methanol have their advantages and costs, and the deployment of renewable methanol at scale will require strong policy support.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Chemistry, Physical
Claudio Tregambi, Piero Bareschino, Dawid P. Hanak, Erasmo Mancusi, Fabio Montagnaro, Francesco Pepe
Summary: This study presents a techno-economic assessment of an integrated system for DAC based on calcium looping and subsequent methanation of CO2. The results show that the levelized cost of CO2 removal for DAC is high and the levelized cost of methane exceeds the current price of methane.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Engineering, Chemical
Zanbu Geng, Yang Yang, Yixi Wang, Tingyu Zhu, Wenqing Xu
Summary: The study utilized a composite metal oxide solid acid catalyst to catalytically regenerate a CO2-rich 5 M MEA solution, and achieved promising results. The catalyst exhibited high catalytic activity and low cost, making it a potential candidate for large-scale industrial applications.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Chemical
John-Timothy Anyanwu, Yiren Wang, Ralph T. Yang
Summary: It was found that amine-grafting at low temperature can result in higher amine loadings, especially under wet grafting conditions. This is because more water occupies the pore space at lower temperatures, leading to higher amine loadings.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Mohammadamin Zarei, Ali Cherif, Vahid Khaligh, Taeksang Yoon, Chul-Jin Lee
Summary: This paper provides a techno-economic analysis of carbon capture technologies for coal-fired power plants. Key findings include the necessity of carbon capture even in ultrasupercritical plants, the significant impact of capacity factor on levelized cost of energy, and the underestimation of costs when deterministic estimates are used.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Engineering, Environmental
Kaiqi Jiang, Paul Feron, Ashleigh Cousins, Rongrong Zhai, Kangkang Li
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2020)
Article
Energy & Fuels
Kangkang Li, Paul H. M. Feron, Timothy W. Jones, Kaiqi Jiang, Robert D. Bennett, Anthony F. Hollenkamp
Article
Engineering, Chemical
Graeme Puxty, Robert Bennett, Will Conway, Mike Webster-Gardiner, Qi Yang, Pauline Pearson, Aaron Cottrell, Sanger Huang, Paul Feron, Alicia Reynolds, Vince Verheyen
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2020)
Article
Green & Sustainable Science & Technology
Xiaoqin Li, Pauline Pearson, Qi Yang, Graeme Puxty, Paul Feron, Dan Xiao
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2020)
Article
Energy & Fuels
Paul H. M. Feron, Ashleigh Cousins, Kaiqi Jiang, Rongrong Zhai, Monica Garcia
Article
Green & Sustainable Science & Technology
Bharti Garg, Nawshad Haque, Ashleigh Cousins, Pauline Pearson, T. Vincent Verheyen, Paul H. M. Feron
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2020)
Review
Chemistry, Physical
Dia Milani, Ali Kiani, Robbie McNaughton
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2020)
Article
Engineering, Chemical
Min Xiao, Ding Cui, Qi Yang, Zhiwu Liang, Graeme Puxty, Hai Yu, Lichun Li, William Conway, Paul Feron
Summary: Tertiary amines are efficient CO2 absorbents but suffer from low absorption rates. To overcome this issue, formulated absorbents with di-amines as promoters have been suggested. This study demonstrates that the addition of di-amines significantly enhances CO2 absorption rates and cyclic capacity in DEEA-based solutions, with a shift in chemical speciation towards (bi)carbonate adducts as CO2 concentration increases. The new di-amine blend solutions show promising potential for rapid and deep CO2 removal.
CHEMICAL ENGINEERING SCIENCE
(2021)
Article
Engineering, Environmental
Changhong Wang, Kaiqi Jiang, Timothy W. Jones, Shenghai Yang, Hai Yu, Paul Feron, Kangkang Li
Summary: The research introduces a novel electrochemical CO2 capture technology that utilizes electrowinning to achieve low energy consumption for CO2 capture and solvent regeneration. This technology shows competitiveness in energy performance and has the potential for practical application.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Chemical
Xing Wu, Debra Fernandes, Paul Feron, Mingmei Ding, Hang Xu, Zongli Xie
Summary: The high-performance MXene interlayered FO membrane showed improved permeability and selectivity in different conditions, with higher water fluxes and selectivity in amino acid/salt solutions, as well as stable treatment of saline water solutions.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Energy & Fuels
Ali Kiani, Michael Lejeune, Chaoen Li, Jim Patel, Paul Feron
Summary: The study conducted a technoeconomic analysis on the production of liquefied synthetic methane (LSM) and found that LSM has the potential to compete economically with liquefied hydrogen (LH2). The detailed analysis provides insights into the suitability of LSM as a carbon-neutral fuel.
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
(2021)
Article
Materials Science, Multidisciplinary
Stefan J. D. Smith, Colin D. Wood, Paul H. M. Feron, Hamidreza Mahdavi, Roger J. Mulder, Cara M. Doherty, Matthew R. Hill, Xavier Mulet
Summary: Combining desired material properties into a single material for gas separations in industry remains a challenge. In this study, a family of polymer liquids inspired by hyper-crosslinked polymers (HCPs) was reported, which showed good volumetric capacity, improved selectivity, and efficient regeneration. The liquids also had low heat of adsorption and specific heat capacity, indicating favorable process thermodynamics.
SCIENCE CHINA-MATERIALS
(2022)