Sustainable and Negative Carbon Footprint Solid-Based NaOH Technology for CO₂ Capture

Abstract

We report a highly efficient system for CO 2 capture and conversion to a "green" solid carbonate that utilizes solid NaOH. This novel technology has important advantages over the currently available technologies regarding percent of CO 2 capture, heat production, and carbonate yields. The study uses a technoeconomic analysis as a quantitative tool in the valuation of CO 2 capture for an environmental and economic gains objective. We highlight two important advantages of this technology that go hand in hand with a sustainable development: low economic cost and negative energy and carbon footprint.

Direct air capture: process technology, techno-economic and socio-political challenges

“…197 Finally, it is also important to highlight that other related solid oxide, hydroxide and carbonate systems are under investigation for cyclic absorption DAC processes. [269][270][271] Challenges for physisorbents in direct air capture and inspiration for improvements from enzymes and drug binding. All deployed sorbents for DAC to date are chemisorbents.…”

“…197 Finally, it is also important to highlight that other related solid oxide, hydroxide and carbonate systems are under investigation for cyclic absorption DAC processes. 269–271…”

Chemical Recycling of a Textile Blend from Polyester and Viscose, Part I: Process Description, Characterization, and Utilization of the Recycled Cellulose

“…In this process, the use of NaOH has been identified as the weakest point. Since NaOH is a relatively expensive chemical (~550 EUR/ton [32]), due to the high power consumption during its production, and, given its prominent role in the proposed process, efficient use of NaOH is key to the process economy. 5 tons NaOH/ton of textile feed is fed to the current process to reach the pH at which the reaction is assumed to proceed most efficiently.…”

Boosting sluggish photocatalytic hydrogen evolution through piezo-stimulated polarization: a critical review

“…Hence, there is a longstanding demand for developing a suitable alternative energy source that is sustainable (zero carbon footprint), economically viable, and environmentally benign, which must be used to fulfil the booming energy needs. 5,6 Among the various non-renewable technologies, hydrogen fuel has emerged as an ideal, clean, and environmentally friendly technology owing to its high energy density per unit mass (140 MJ kg À1 ) and its ability to produce clean water as a by-product on combustion. For decades, hydrogen (H 2 ) has been primarily produced by coal gasification and steam reforming methods, which normally operate under harsh condition and use fossil fuels as the main precursor.…”