Fabrication of CaO-Based Sorbents for CO₂ Capture by a Mixing Method

Abstract

Three types of sorbent were fabricated using various calcium and support precursors via a simple mixing method, in order to develop highly effective, durable, and cheap CaO-based sorbents suitable for CO(2) capture. The sorption performance and morphology of the sorbents were measured in a thermogravimetric analyzer and a scanning electron microscopy, respectively. The experimental results indicate that cement is a promising low-cost support precursor for contributing to the enhancement of cyclic CO(2) sorption capacity, especially when organometallic calcium precursors were used. A sorbent (with 75% CaO content) made from calcium l-lactate hydrate and cement showed the highest CO(2) sorption capacity of 0.36 g of CO(2)/g of sorbent and its capacity decreased only slightly after 70 cycles of carbonation and calcination.

A Study on the Evolution of Carbon Capture and Storage Technology Based on Knowledge Mapping

“…The contents of the main emerging trends in the CCS technology include at least the following aspects: (1) Emerging techniques and processes. With the development of science and technology, relevant techniques and processes have been developed and applied in CCS technology, such as postcombustion [69,70,98], combustion synthetic method [72], calcium looping technology [73,74], amine-functionalized solids and amine-scrubbing technique [75,76], facile nucleophilic substitution reaction [78], and so on. (2) Emerging materials.…”

“…(4) Socioeconomic analysis. This research trend is related to cost of carbon capture [70], cost of carbon transportation [74], economic performance of CCS technology [76,101], human health and environment [70,102].…”

“…Thus, in order to overcome the disadvantages, they fabricated bimodal mesoporous silica hollow spheres and considered that the CO 2 adsorption efficiency may depend on the temperature of adsorption and the specific surface areas of the sample. Qin et al [76] analyzed that the process of carbon capture contributes about 75% of the total cost in CCS technology, however, in fact, only a few of the proposed technologies can be technically feasible and cost-effective in industrial practice, and currently, amine scrubbing is the only technique that is relatively mature and has commercial application possibilities. Therefore, they intended to find an efficient and low-cost fabricating and sorbent technology using the method of extending wet mixing and a cheaper insoluble precursors.…”

Matching of kinetics of CaCO3 decomposition and CuO reduction with CH4 in Ca–Cu chemical looping

“…The reaction rate of CuO reduction with methane was determined using a composite containing 75 wt. % of CuO supported on alumina, which was synthesized from copper (II) acetate (98.0-102.0%, Ajax Finechem) and commercial activated aluminium oxide (≥99%, Sigma-Aldrich) via a wet mixing method as described in our previous work [13,46]. In order to minimize the potential chemical interaction between CuO and Al 2 O 3 , γ-alumina was first calcined in air at 1373 K for 2 h to form γ-alumina [47].…”

Wet mixing combustion synthesis of CaO-based sorbents for high temperature cyclic CO2 capture

“…Several synthesis methods have been proposed to prepare calcium-based sorbents with high reactivity, including calcination of inorganic calcium precursors (CICP) [12,13], flame spray pyrolysis (FSP) [14], sol-gel combustion synthesis (SGCS) [15][16][17], precipitated calcium carbonate (PCC) [18][19][20], doping potassium or sodium [21,22], water/steam hydration [23], and other methods [24][25][26][27]. The first three synthesis methods apply combustion processes during preparation, thus producing a hollow-structured sorbent with high reactivity.…”