Abstract
The agenda to utilize and efficiently convert biomass has been raised to alleviate environmental problems and pressure on the reliance on fossil fuel. Intermediate pyrolysis has the ability to treat different biomasses and coproduction of biooil and adsorption biochar. This review article aims to evaluate the appropriateness of intermediate pyrolysis for the coproduction of biooil and adsorption biochar. It was observed that coproduced biooil is of high quality, stable, and miscible that can be used directly to existing engines or be easily blended. The biochar coproduced is good for adsorption but is not stable for microbial attack and hence unsuitable in soil treatment but for hydrometallurgy. Since the process is capable of treating waste biomass, it is an opportunity for further investigations in areas where wastes are plenty and less utilized. To increase the effectiveness of this technology for coproduction, optimizing parameters, design of efficient reactors, and use of catalyst must be worked upon.
Highlights
Different biomass conversion methods exist including direct combustion, biological, and thermochemical [7, 8], but thermochemical conversions have gained advantages over others [9, 10]. ey are effective, environmentally friendly, fast, of low maintenance and labor costs, selective in targeting specific product, and able to convert biomasses which do not compete with food such as biomass wastes [11]
Due to the high demand for biooil and adsorption biochar, the need for utilization of wastes, need for extra upgrading treatment procedures of fast pyrolysis biooil, and low quality and quantity of biochar from fast pyrolysis, intermediate pyrolysis seems to be a way to go. is new technology is regarded as a promising technology especially in coproduction and utilization of different biomass
Since this method is emerging and suitable for coproduction, data on product quality comparisons with other manufacturing processes should be available. Such a comparison is not well documented. us, the comparison can give more emphasis on its utilization while enjoying the mentioned advantages above. us, this review article aimed at reviewing the possibilities of utilizing intermediate pyrolysis in the coproduction of biooil and adsorption biochar. ese coproduced products should be of high quality, such that they can be used directly or with little upgrading. is was done by comparing the products from fast, slow, and intermediate pyrolysis, biodiesel, fossil diesel, and commercially activated carbon. e study aimed at reviewing the possibilities of using intermediate pyrolysis in the utilization of the ever increasing and difficult wastes that are difficult to be handled by fast pyrolysis
Summary
Different biomass conversion methods exist including direct combustion, biological, and thermochemical [7, 8], but thermochemical conversions have gained advantages over others [9, 10]. ey are effective, environmentally friendly, fast, of low maintenance and labor costs, selective in targeting specific product, and able to convert biomasses which do not compete with food such as biomass wastes [11]. Is was done by comparing the products from fast, slow, and intermediate pyrolysis, biodiesel, fossil diesel, and commercially activated carbon.
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