Storage of CO
2 is a key step of carbon capture, utilization and storage (CCUS) for carbon neutral, but full of technique and economical challenge [
9,
10] and limitation of available storing space [
11,
12]. In this work, we proposed the carbon fixation of organics (from the adsorption-desorption unit) to production of carbon nanotubes (CNTs) by chemical vapor deposition (CVD) method, in which the organic matters decomposed mainly by transition metal-based catalysts under high temperature to CNTs and H
2 [
2,
3,
4,
5,
6,
7,
8]. In addition, we performed many studies on the CNT-based adsorbents for the treatment of VOCs and organic-containing water previously [
13,
14,
15,
16,
17,
18]. These allowed us to build a cycle of adsorption-desorption-carbon fixation technology route, in which CNT-based adsorbent was used for efficient adsorption and desorption of organic matter, and the desorbed organic matter was then transformed into CNTs by high-temperature catalyst. By this means, the direct carbon emissions were reduced largely and the carbon element was changed from pollution source to new material resource. In addition, the era of carbon neutral called for the use of green electricity (from hydro, solar, wind and photovoltaics power etc.) as an energy supply for the emission reduction, aiming to reduce the indirect carbon emissions mentioned above [
19,
20]. In this case, it allowed us to develop an industrial closed loop based on the exhaust gas. For the quantitative comparison, we presented the comprehensive analysis of different technologies (including direct combustion, catalytic oxidization, adsorption-desorption-combustion, and adsorption-desorption-carbon fixation) for the treatment of VOCs from aromatics storage tank from 3000-65,000 mg/m
3 to 12 mg/m
3. Their energy consumption and carbon emissions varied significantly. The use of green electricity as energy supply would make a great contribution to reduce carbon emissions because the green electricity generating process would not burn coal or other energy sources and produced no CO
2. Furthermore, the combination of our technology and green electricity showed the potential to produce a near carbon-zero carbon emissions cycle, as well as large quantities of valuable carbon products. This evaluation would provide a new insight into the carbon emissions of VOCs treatment and offer a new choice for any chemical processes toward carbon zero.