| Title |
Spent mushroom substrate is capable of physisorption-chemisorption of CO2 |
| ID_Doc |
13679 |
| Authors |
Alves, LD; Moreira, BRD; Viana, RD; Dias, ES; Rinker, DL; Pardo-Gimenez, A; Zied, DC |
| Title |
Spent mushroom substrate is capable of physisorption-chemisorption of CO2 |
| Year |
2022 |
| Published |
|
| DOI |
10.1016/j.envres.2021.111945 |
| Abstract |
No in-depth investigation exists on the feasibility of integrating hydrothermal carbonization (HTC) and pelletization into the process of making spent mushroom substrate (SMS), an agro-food residue from the commercial mushroom industry, into an adsorbent for post-combustion CO2 removal. Therefore, this study analyzed if it could be possible for systematically converting low-pressure hydrochars of various SMSs into carbon-adsorbing mini-capsules. Sources of SMS included paddy straw and achiote capsule shell from Pleurotus ostreatus; eucalyptus sawdust and grassy straw from Lentinula edodes; and compost containing peat or soil as casing layer from Agaricus subrufescens. The eucalyptus sawdust and grassy straw from L. edodes outperformed the other biomaterials in adsorbing CO2 , and thus effectively encapsuled most of the gas, 8.25 mmol g(-1) and 8.10 mmol g(-1) , respectively. They contained mostly hetero-atoms of O and N, requiring less unit energy to bind acidic molecules of CO2 at the alkaline sites. The amount of unit energy the pore-filling process demanded at 25 degrees C was 12.65 kJ mol(-1) , an attribute of self-sustaining and saleable physisorption. A negative 6.80 kJ mol(-1) free energy validated both spontaneity and exothermal of biocarbons at steady-state atmosphere. The major findings and innovations of our study support utilizing SMS as an adsorbent as a carbon capture, storage and utilization networking. Our insights into the physisorption-chemisorption on SMS are timely and relevant to help manage the re-use of SMS, and thus bring the global mushroom industry closer to environmental sustainability and toward a lower carbon society and circular economy. |
| Author Keywords |
Agro-food residue; Physical sorbent; Hydrothermal carbonization; Microporous carbonaceous material; Pelletization; Post-combustion greenhouse gas |
| Index Keywords |
Index Keywords |
| Document Type |
Other |
| Open Access |
Open Access |
| Source |
Science Citation Index Expanded (SCI-EXPANDED) |
| EID |
WOS:000704710100008 |
| WoS Category |
Environmental Sciences; Public, Environmental & Occupational Health |
| Research Area |
Environmental Sciences & Ecology; Public, Environmental & Occupational Health |
| PDF |
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