Characterization of Natural Zeolite and Chicken Manure Derived Biochar for Carbon Dioxide Adsorption in Biogas

Abstract

Although biogas is clean and environmentally friendly, its existence is often unsustainable, especially in rural area. Consumption of fossil fuel energy still dominates because cheaper, higher in energy efficiency and ready to use than biogas. One of the efforts to make biogas can compete with fossil fuel energy is by increasing calorific value. Reduction of carbon dioxide by adsorption enhances the calorific value that evidenced by methane enrichment. In this study, we investigated the effect three types of combined adsorbent: pure natural zeolite (Z-Z), zeolite-biochar from chicken manure (Z-B1) and zeolite-modified biochar (Z-B2) on methane content. The result showed that adsorption of biogas using Z-Z, Z-B1 and Z-B2 increased methane level with enhancement of 1,36; 28,92; and 11,27% respectively compared before adsorption. To confirm whether these results were influenced by adsorbent’s character or not as consequence adsorbent characterization have been done in this study.

The effects of adsorbent mass using red brick powder on the results of biogas purification

“…This will result in the increase of the contact area between the CO 2 gas and the adsorbent, so the CO 2 content will continue to decrease along with the increase in the mass of the adsorbent. These results are in line with previous studies [17], [18], [19], [20]. Analysis of the biogas flowrates effect on CO 2 concentrations in biogas with mass and time variables can be seen in Figure 5.…”

“…High level (+1) shows high treatment value and low level (-1) shows low treatment value on each factor [15]. The matrix form is obtained in Figure 8; Method of the Gauss Siedel iteration was used the completion of matrix on Figure 8 [17], [19], [20]. Increasing the mass of the adsorbent will increase the percentage of CH 4 because a lot of CO 2 is bound to the adsorbent, thereby increasing the ratio between CH 4 and CO 2 .…”

“…This happens because the Mass interaction and Flowrate are inversely proportional. Increased Mass will potentially increase CH 4 levels because CO 2 levels become reduced [17], [21], [22]. While an increase in Flowrate has the potential to reduce the ratio between CO 2 and CH 4 because although a lot of CH 4 is obtained, there is also a lot of CO 2 that has not been adsorbed so that the ratio decreases.…”

The Substitution of Natural Zeolite with Agriculture Waste as Carbon Dioxide Adsorbent in Biogas Purification

“…Khalil and Auora [4] reported that biochar can exhibit selective adsorption of carbon dioxide. The combination of natural zeolite and chicken manure-based-biochar is able to adsorb carbon dioxide and increase methane content of biogas by approximately 29% compared to non-purified biogas [9]. This study investigates the use of rice husk-based biochar for biogas purification that is considered rare.…”