This work investigates post-combustion CO2 capture at ambient temperature in a fixed bed by means of CaO-based sorbents. Two sorbents were used: limestone and pellets prepared from powdered limestone using calcium aluminate cement as a binder. The results showed that pre-hydration had a...

Large scale pilot plants are currently demonstrating the feasibility of the Calcium-looping (CaL) technology built on the multicyclic calcination/carbonation of natural limestone for post-combustion and pre-combustion CO2 capture. Yet, limestone derived CaO exhibits a drop of conversion when...

The Ca-looping (CaL) technology is already recognized as a potentially viable method to capture CO2 from postcombustion gas in coal fired power plants. In this process, CO2 is chemisorbed by CaO solid particles derived from precalcination of cheap and widely available natural limestone. The...

High-temperature CO2 capture by Ca looping cycles was investigated in the presence of SO2. The sorbents tested included natural limestone (HV-P), pellets formed from powdered limestone with a binder (HV-AH) and pellets formed from powdered acetified limestone with a binder (HV10-AH). The binder...

The Ca-Looping (CaL) technology, based on a dual gas-fluidized bed system of CaO/CaCO3 particles operated at high temperature, is a viable technological process for highly efficient pre-combustion and post-combustion CO2 capture. In this paper we show a lab-scale experimental study on the...

One of the main challenges of carbon capture and storage technologies deals with the energy penalty associated with CO2 separation and compression processes. Thus, heat integration plays an essential role in the improvement of these systems’ efficiencies. CO2 capture systems based on...

This work presents a CO2 sorbent that may be synthesized from low-cost and widely available materials following a simple method basically consisting of impregnation of a nanostructured silica support with a saturated solution of calcium nitrate. In a first impregnation stage, the use of a...

The treatment of food waste (FW) is an important challenge in developed and undeveloped countries due to the rapid disintegration of this waste. Hence biogas technology is used to produce energy and to reduce the volume of waste. This technology has disadvantages in terms of sensitivity to...

This study aimed to document the material balance and evaluate the energy profit ratios (EPRs) of two processes for recovering hydrocarbon from the green microalgae Botryococcus braunii, which produces hydrocarbon intercellularly, releases it extracellularly, and accumulates it in the...

The effect of thermal pretreatment (55–160 °C) on the degradation characteristics of kitchen waste during anaerobic fermentation at medium temperature was investigated. The breakdown of both organics and inorganics and the enhancement of biogas production in batch tests caused by thermal...