Abstract
This paper proposes an innovative CO2 enrichment system for crop production under a controlled greenhouse environment by means of tetra-n-butylammonium bromide (TBAB) + CO2 semi-clathrate hydrate (SC). In this system, CO2 is captured directly from exhaust gas from a combustion heater at night, which can be used for stimulating photosynthesis of crops in greenhouses during daytime. Although the gas capacity of TBAB + CO2 SC is less than that of CO2 gas hydrate, it is shown that TBAB + CO2 SC can store CO2 for CO2 enrichment in crop production even under moderate pressure conditions (<1.0 MPa) at 283 K.
Highlights
Sustainability of agriculture is a challenging subject because of future rapid global population increase [1]
We propose a novel concept of a CO2 enrichment system for greenhouse production using semi-clathrate hydrate
To confirm the crystal structure of the sample formed under conditions of the proposed system, we carried out powder X-ray diffraction (PXRD) measurements at 93 K to avoid leakage of CO2+N2 molecules in the semi-clathrate hydrate (SC) sample under atmospheric pressure
Summary
Sustainability of agriculture is a challenging subject because of future rapid global population increase [1]. CO2 gas hydrate can be used as a source of stored cold thermal energy to reduce the amount of electricity consumed, which contributes to partial removal of heat from greenhouses in combination with other innovative methods such as root zone cooling [19,20] or nocturnal cooling in summer. The drawback to this approach is that CO2 gas hydrate is formed under high-pressure and low-temperature conditions (e.g., >1.2 MPa at 273 K). CO2 gas and cold thermal energy from the dissociating SC is supplied in the greenhouse to stimulate crop photosynthesis
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
