Gross calorific value estimation for milled maize cob biomass using near infrared spectroscopy

Abstract

Abstract. The maize cob biomass is one of important biomass crops in Thailand. Nowadays, the use of the biomass as renewable resource is increasing, especially residue agriculture waste. As we know that the biomass properties impact combustion, in order to achieve boiler efficiency, its energy characteristics of biomass was required immediately before burning. This work uses the FT-near infrared spectroscopy to estimate gross calorific value (GCV) of maize cob as the rapid method. Each sample was scanned using diffuse reflectance mode at a wavenumber range between 12500-3600 cm and completed 32 scans per sample, then averaged to be one spectrum. The results showed that this technique could decrease a processing time to 1-2 minutes per sample to determine GCV whereas alternatively the current method used a processing time of 25-30 minutes per sample. The capacity of the model gave root mean square error of cross validation (RMSECV) of 91.1 Jg -1 , which was low. Hence, the model was acceptable and cloud be used for screening.

Rapid Evaluation of Biomass Properties Used for Energy Purposes Using Near-Infrared Spectroscopy

“…The prediction of biomass properties used for energy purpose using NIR spectroscopy has been utilized by many researchers, such as cassava rhizome ground (MC, HHV, and LHV) [41], maize cob (GCV) [19], and recycled sawdust (GCV and ash) [42]. The measurement of MC was conducted by Shrestha and Sirisomboon [43], predicting the MC of bamboo wood chips using two different portable spectrometers, i.e., NIR-Gun (600-1100 nm) and MicroNIR (1150-2150 nm).…”

Design of a Biomass Micro Gasifier Cookstove by CFD Modelling

“…It is estimated that the amount of energy needed to cook for a family of four members is 5MJ/s. The calorific value of corn cobs is taken as 17.4 MJ/kg [23]. The diameter of the combustion chamber (D) is calculated using Equation …(3) with the relation for the specific biomass consumption (ṁ′ 𝑏𝑏𝑏𝑏𝑏𝑏 ) taken as 0.025 kg/m 2 s from the experimental results conducted with the existing biomass cookstove.…”