A kinetic of the pyrolysis rice straw is investigated with thermogravimetric analyzer non-isothermal methods selected for analyzing solid-state kinetics data presented. The weight loss was measured by TGA in nitrogen atmosphere. samples were heated over a range temperature from 298 K to 973 three different heating rates 5, 10 and 15 min-1. results obtained thermal decomposition process indicate that there are two main stages such as active passive pyrolysis. In DTG thermograms peaks at...

A mathematical model of a biomass downdraft gasification process has been developed. The was considered to be four modules that are drying, pyrolysis, oxidation, and reduction which the products upper module will reactants next. one-dimensional kinetic finite rate models were applied drying modules. pyrolysis took place when temperature reached 473 K. equilibrium sequence used describe oxidation by considering order reaction rates. For validation comparison showed good agreement. In...

Biodrying is an essential part of the mechanical–biological treatment process that minimizes moisture content and simultaneously maximizes heating value for refuse-derived fuel (RDF) production. Although mechanical separation operates effectively in Thailand’s RDF production, high organic levels their degradation cause contamination RDF, producing wet RDF. Aeration effective biodrying process, can reduce RDF’s as well increase its value. To maximize effect, aeration should be optimized based...

Biodrying technology is commonly used in Thailand to produce refuse-derived fuel (RDF), however, this remains ineffective on high-moisture waste. Air supply key ensuring homogenous temperature development within the waste matrix during biodrying, increasing RDF quality. This study investigated negative aeration local municipal solid biodrying meet standards reduced time. Lysimeter experiments were performed pre-shredded (300 kg/m3) using different patterns. The temperature, vent gas oxygen...

This study investigates the optimization of aeration rates for biodrying market waste using negative-pressure ventilation. Market waste, characterized by a high moisture content (MC) and rapid decomposition, presents challenges in management. Over 12 days, three (ARs) 0.2, 0.4, 0.6 m3/kg/day were examined, most effective continuous ventilation configuration was identified terms heat generation, reduction, efficiency. The results indicate that AR retention removal 0.2 m3/kg/day, achieving...

This study investigates the effect of aeration rate and feedstock density on biodrying process to improve quality type 2 wet refuse-derived fuel. The were varied investigate these parameters’ system’s performance. experiments used 0.3 m3 lysimeters with continuous negative ventilation five days operation. In Experiment A, rates 0.4, 0.5, 0.6 m3/kg/day tested a bulk 232 kg/m3. B, optimum determined in A (0.5 m3/kg/day) used, was (232 kg/m3, 250 270 kg/m3). results showed that an 0.5 most...

Hydrothermal carbonization (HTC) process is a pretreatment to convert feedstock into coal-liked material, called hydrochar. This work, HTC of sugarcane stranded was investigated at (1) different reaction temperatures (180oC, 220oC and 250oC) for 1 h retention time (2) times (0.5, 2 h) temperature study the effect operation condition product yield. The results show that when increasing, hydrochar yield hydrogen oxygen contents tend decrease due hydrolysis hemicellulose cellulose. In contrast,...

The objective of this study is to investigate and analyze the tar yields structural changes formed during a high temperature thermal cracking process. Experiments were conducted in order effect on yield characteristic chemicals tar. All experiments carried out with parawood under steady-state conditions. pyrolyzer was controlled at 600°C pyrolysis gases reformer by nitrogen. tests performed six different temperatures: 700, 800, 900, 1,000, 1,100, 1,200°C. samples analyzed gravimetric...

Coconut agro-industry in the western region of Thailand generates a large amount residues. This study investigated energy production potential discarded coconut petioles, with focus on co-gasification refuse-derived fuel (RDF). Gasification tests involving RDFs and their mixtures (25%, 50%, 75% or 100% by weight) were conducted laboratory-scale fixed bed reactor. Fuel samples 5 g gasified at 700°C-900°C for 60 minutes, using simulated air (79% N2 to 21% O2, volume) as gasifying agent....

Thailand still faces problems with municipal solid waste (MSW) management. No law enforcement about sorting from generators affects the contamination of contrary objects in stream. Due to a high proportion organic waste, mixed has moisture and chloride content, considerable obstacles recycling waste-to-energy businesses. Although refuse-derived fuel (RDF) production use as source for heat electricity generations is one best-available solutions handle this crisis, many factors disrupt...

Abstract The application of high temperature air combustion in incineration solid waste was investigated. with preheated diluted secondary had effectively more energy saving and NOX emission reduction, but required a sufficient amount to save than non-dilution condition. minimum 15 17% oxygen concentration conditions are 621 532°C, respectively. optimum condition is preheated-diluted at 900°C the operating ranges above between 21% concentrations. Keywords: conservationflue gas...

The biomass is popularly used as renewable energy. In Thailand rice the most consume agricultural products. Agricultural residues from husk can be an energy resource. However, alkali and earth materials (AAEMs) in ash are causes of corrosion erosion problem heat exchanger equipment, while acidity affects slagging agglomeration problem. Reduction minimize order to challenge reduction ash, hydrothermal carbonization process was selected. Thai sample compare result treatment. heated under...