稻草熱裂解製備生質炭及催化氣體產物

Tunghai University Institutional Repository > 工學院 > 環境科學與工程學系所 > 碩博士論文 > Item 310901/31883

Please use this identifier to cite or link to this item: http://140.128.103.80:8080/handle/310901/31883

Title:	稻草熱裂解製備生質炭及催化氣體產物
Other Titles:	Preparation of Biochar by Pyrolysis of Rice Straw with Gas Product Catalysis
Authors:	郭博然 KUO, PO-JAN
Contributors:	魏玉麟 WEI, YU-LING 環境科學與工程學系
Keywords:	稻草;生質炭;生質液體;熱裂解;觸媒 rice straw;biochar;bio-liquid;pyrolysis;catalyst
Date:	2019
Issue Date:	2019-12-16T07:07:43Z (UTC)
Abstract:	本研究以稻草進行慢速熱裂解製備生質炭，探討在低溫400-500℃之區間內，溫度對於產物分布及產品特性之影響，並利用觸媒床設計，對於熱裂解蒸氣進行改質及冷凝，收集後分析成分。本研究針對稻草進行TGA-FTIR分析以進行產物之預測；對於生質炭進行碳含量、熱值、比表面積之分析；對於生質液體進行GC-MS分析。TGA-FTIR分析結果發現加熱速率對於氣相產物特性有著極大的影響。10℃/min之加熱速率之IR圖譜並未偵測到任何有機物之生成，僅顯示水氣及二氧化碳之峰位；而30℃/min之加熱速率者則於380℃時偵測到甲酸及碳氧鍵之訊號，並於540℃時偵測到甲烷訊號。本實驗室自製之熱解爐對稻草進行熱解，結果顯示，生質炭之比表面積隨著溫度的提高而增加，其孔徑大小則隨著溫度的上升而減小，本研究以400-500℃所製備之生質炭皆屬於中孔徑結構，其熱值與裂解溫度無線性關係，400℃、450℃、500℃之熱值依序為5180 kcal/kg、5000 kcal/kg、5430 kcal/kg。GC-MS分析結果顯示，生質液體主要由酸類、酮類、醇類、酚類及呋喃所組成。藉由觸媒的添加得以改變生質液體化學組成的比例。酸類、酮類及醇類對於燃油而言為非必要物質，酚類及呋喃類則有助於增加油品價值。 The study uses slow pyrolysis of rice straw at the temperature range of 400-500℃ to investigate the effect of temperature on product distribution and characteristics. Catalysts were add for upgrading pyrolysis vapor products that are condensed as liquid product. The TGA-FTIR result shows that heating rate considerably affects the product characteristics. In the 10℃/min FTIR spectra, only H2O and CO2 peaks are observed without any organic matters. For the 30℃/min FTIR spectra, formic acid and hydrocarbons peak at 380℃ and the peak at 540℃ are observed. The biochar BET surface area increases with elevated temperature, and its pore diameter decreases with increased temperature. The biochar produced at 400-500℃ are all defined as mesoporous (2.50 nm pore size). The heating value of biochar at 400, 450, and 500℃ were 5180, 5000, and 5430 kcal/kg, respectively. GC-MS result shows that the bio-liquid mainly consists of acid, ketone, alcohol, phenol, and furan. Addition of catalyst changes the chemical compositions of bio-liquid. Considering fuel heating value, acid, ketone, and alcohol are undesirable fuel components, on the other hand, phenol and furan can improve the bio-liquid calories.
Appears in Collections:	[環境科學與工程學系所] 碩博士論文

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