scholarly journals Carbon dioxide as a pH-switch anti-solvent for biomass fractionation and pre-treatment with aqueous hydroxide solutions

2017 ◽  
Vol 19 (9) ◽  
pp. 2129-2134 ◽  
Author(s):  
Trang Quynh To ◽  
Ceire Kenny ◽  
Soshan Cheong ◽  
Leigh Aldous
Keyword(s):  
Carbon Dioxide ◽  
Calcium Hydroxide ◽  
Enzymatic Saccharification ◽  
Rice Husks ◽  
Biomass Fractionation ◽  
Pre Treatment ◽  
Carbon Dioxide Addition

Hydroxide pre-treatment of rice husks allows enzymatic saccharification, carbon dioxide addition recovers silica, and calcium hydroxide addition completes the recycle.

Enzymatic saccharification of Eucalyptus bark using hydrothermal pre-treatment with carbon dioxide

2010 ◽  
Vol 101 (13) ◽  
pp. 4936-4939 ◽  
Author(s):  
Yasuyuki Matsushita ◽  
Kazuchika Yamauchi ◽  
Keiji Takabe ◽  
Tatsuya Awano ◽  
Arata Yoshinaga ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Enzymatic Saccharification ◽  
Pre Treatment ◽  
Eucalyptus Bark

Controlled preparation of micro–nano hierarchical hollow calcium carbonate microspheres by pressurized-CO2 carbonization and their CaCO3:Eu3+ photoluminescence properties

CrystEngComm ◽  
2021 ◽  
Vol 23 (16) ◽  
pp. 3033-3042
Author(s):  
Liubin Shi ◽  
Mingde Tang ◽  
Yaseen Muhammad ◽  
Yong Tang ◽  
Lulu He ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Calcium Carbonate ◽  
Calcium Hydroxide ◽  
Hierarchical Structure ◽  
Ethylenediaminetetraacetic Acid ◽  
Disodium Salt ◽  
Hollow Microspheres ◽  
Photoluminescence Properties ◽  
Controlled Preparation

Herein, calcium carbonate hollow microspheres with a micro–nano hierarchical structure were successfully synthesized using disodium salt of ethylenediaminetetraacetic acid (EDTA-2Na) as an additive, by bubbling pressurized carbon dioxide and calcium hydroxide at 120 °C.

scholarly journals Optimization of oxalic acid pre-treatment and enzymatic saccharification in Typha latifolia for production of reducing sugar

2020 ◽  
Vol 18 (1) ◽  
Author(s):  
Sunil Kodishetty Ramaiah ◽  
Girisha Shringala Thimappa ◽  
Lokesh Kyathasandra Nataraj ◽  
Proteek Dasgupta
Keyword(s):  
Oxalic Acid ◽  
Enzymatic Saccharification ◽  
Typha Latifolia ◽  
Reducing Sugar ◽  
Pre Treatment

Reversible covalent chemistry of carbon dioxide unlocks the recalcitrance of cellulose for its enzymatic saccharification

2020 ◽  
Vol 295 ◽  
pp. 122230 ◽  
Author(s):  
Jianyun Gan ◽  
Ya Peng ◽  
Qin Chen ◽  
Gang Hu ◽  
Qinqin Xu ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Enzymatic Saccharification ◽  
Reversible Covalent

Delayed Hardening and Reactivation of Binder Calcite, Common Problems in Radiocarbon Dating of Lime Mortars

Radiocarbon ◽  
2020 ◽  
Vol 62 (3) ◽  
pp. 565-577 ◽  
Author(s):  
Alf Lindroos ◽  
Åsa Ringbom ◽  
Jan Heinemeier ◽  
Irka Hajdas ◽  
Jesper Olsen
Keyword(s):  
Carbon Dioxide ◽  
Phosphoric Acid ◽  
Calcium Hydroxide ◽  
Radiocarbon Dating ◽  
Lime Mortars ◽  
Dating Method ◽  
Common Problems

ABSTRACTWhen sampling mortars for radiocarbon (14C) dating it is crucial to ensure that the sample has hardened rapidly relative the resolution of the dating method. Soft and porous lime mortars usually fulfill this criterion if the samples are taken from an uncovered surface from less than a few centimeters deep. However, hard, concrete-like mortars may be impermeable for carbon dioxide and even the outermost centimeters may still contain uncarbonated calcium hydroxide. These mortars may harden very slowly and contain carbonate that formed centuries or even millennia after the original building phase, and they can still be alkaline and capture modern 14C, causing younger 14C ages than the actual construction age. Another problem is reactivation of the binder carbonate if it has been partly decarbonated during a fire later on in its history. It will be shown that these young carbonates dissolve rapidly in phosphoric acid and in many cases a reasonable 14C age can be read from 14C profiles in sequential dissolution if the measurements from initially formed carbon dioxide are disregarded. However, if a mortar was made waterproof deliberately by adding crushed or ground tile, as in Roman cocciopesto mortars, it may be very difficult to get a conclusive dating.

Effects of carbon dioxide addition to fuel on flame radiation fraction in propane diffusion flames

Energy ◽  
2021 ◽  
Vol 218 ◽  
pp. 119552
Author(s):  
Yuling Dou ◽  
Haiqiang Liu ◽  
Bin Liu ◽  
Yu Zhang ◽  
Yongqiang Liu ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Diffusion Flames ◽  
Flame Radiation ◽  
Carbon Dioxide Addition
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