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Title: Relating Structural and Microstructural Evolution to the Reactivity of Cellulose and Lignin during Alkaline Thermal Treatment with Ca(OH) 2 for Sustainable Energy Production Integrated with CO 2 Capture

Abstract

The transition toward a low carbon economy necessitates the implementation of a wide range of negative emissions technologies, including bioenergy integrated with CO 2 capture and storage. Advancing large-scale or modular technologies for bioenergy with carbon capture and storage requires a fundamental understanding of chemo-morphological coupling in these material systems. In this context, integrated chemical pathways such as alkaline thermal treatment (ATT) of biomass which involves the production of bio-H 2 while converting and storing CO 2 as solid carbonates provides promising potential for integrating bioenergy with carbon capture and storage. We elucidate the structural and morphological changes when biomass feedstocks such as cellulose and lignin are reacted with calcium hydroxide to capture, convert, and store CO 2 as calcium carbonate while producing energy carrier such as H 2. These structural and morphological changes were monitored using synchrotron based in operando multiscale X-ray scattering measurements. Enhanced CO 2 capture at temperatures above 375 °C was evident from the significant growth of the calcium carbonate phase at these conditions. Increase in the surface area and porosity of cellulose was noted compared to lignin due to the relatively fast decomposition of cellulose. Pore–solid interfaces in Ca(OH) 2 + cellulose system became smoothermore » in the temperature range of 500–700 °C compared to Ca(OH) 2 + lignin system, where the interfaces became rougher. Enhanced roughness of the pore–solid interfaces in the presence of lignin is attributed to the simultaneous slow decomposition of lignin and formation of calcium carbonate.« less

Authors:
 [1]; ORCiD logo [1];  [2]; ORCiD logo [1]
  1. Univ. of Wisconsin, Madison, WI (United States). Dept. of Civil and Environmental Engineering. Grainger Inst. for Engineering
  2. Argonne National Lab. (ANL), Argonne, IL (United States). X-Ray Science Division. Advanced Photon Source
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Wisconsin, Madison, WI (United States)
Sponsoring Org.:
USDOE Office of Science (SC); Wisconsin Alumni Research Foundation (United States)
OSTI Identifier:
1510000
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
ACS Sustainable Chemistry & Engineering
Additional Journal Information:
Journal Volume: 7; Journal Issue: 5; Journal ID: ISSN 2168-0485
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; alkaline thermal treatment; biomass; calcium carbonate; carbon capture; cellulose; lignin; X-ray scattering

Citation Formats

Asgar, Hassnain, Mohammed, Sohaib, Kuzmenko, Ivan, and Gadikota, Greeshma. Relating Structural and Microstructural Evolution to the Reactivity of Cellulose and Lignin during Alkaline Thermal Treatment with Ca(OH)2 for Sustainable Energy Production Integrated with CO2 Capture. United States: N. p., 2019. Web. doi:10.1021/acssuschemeng.8b06584.
Asgar, Hassnain, Mohammed, Sohaib, Kuzmenko, Ivan, & Gadikota, Greeshma. Relating Structural and Microstructural Evolution to the Reactivity of Cellulose and Lignin during Alkaline Thermal Treatment with Ca(OH)2 for Sustainable Energy Production Integrated with CO2 Capture. United States. doi:10.1021/acssuschemeng.8b06584.
Asgar, Hassnain, Mohammed, Sohaib, Kuzmenko, Ivan, and Gadikota, Greeshma. Wed . "Relating Structural and Microstructural Evolution to the Reactivity of Cellulose and Lignin during Alkaline Thermal Treatment with Ca(OH)2 for Sustainable Energy Production Integrated with CO2 Capture". United States. doi:10.1021/acssuschemeng.8b06584.
@article{osti_1510000,
title = {Relating Structural and Microstructural Evolution to the Reactivity of Cellulose and Lignin during Alkaline Thermal Treatment with Ca(OH)2 for Sustainable Energy Production Integrated with CO2 Capture},
author = {Asgar, Hassnain and Mohammed, Sohaib and Kuzmenko, Ivan and Gadikota, Greeshma},
abstractNote = {The transition toward a low carbon economy necessitates the implementation of a wide range of negative emissions technologies, including bioenergy integrated with CO2 capture and storage. Advancing large-scale or modular technologies for bioenergy with carbon capture and storage requires a fundamental understanding of chemo-morphological coupling in these material systems. In this context, integrated chemical pathways such as alkaline thermal treatment (ATT) of biomass which involves the production of bio-H2 while converting and storing CO2 as solid carbonates provides promising potential for integrating bioenergy with carbon capture and storage. We elucidate the structural and morphological changes when biomass feedstocks such as cellulose and lignin are reacted with calcium hydroxide to capture, convert, and store CO2 as calcium carbonate while producing energy carrier such as H2. These structural and morphological changes were monitored using synchrotron based in operando multiscale X-ray scattering measurements. Enhanced CO2 capture at temperatures above 375 °C was evident from the significant growth of the calcium carbonate phase at these conditions. Increase in the surface area and porosity of cellulose was noted compared to lignin due to the relatively fast decomposition of cellulose. Pore–solid interfaces in Ca(OH)2 + cellulose system became smoother in the temperature range of 500–700 °C compared to Ca(OH)2 + lignin system, where the interfaces became rougher. Enhanced roughness of the pore–solid interfaces in the presence of lignin is attributed to the simultaneous slow decomposition of lignin and formation of calcium carbonate.},
doi = {10.1021/acssuschemeng.8b06584},
journal = {ACS Sustainable Chemistry & Engineering},
number = 5,
volume = 7,
place = {United States},
year = {2019},
month = {1}
}

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This content will become publicly available on January 30, 2020
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