CAJ | 학술논문

研究了不同压力、升温速率以及添加CaO催化剂对松木屑热解过程的影响并进行了动力学分析。研究结果表明：1)增加系统的反应压力会降低热解过程的最终失重率，最终的剩余物质增加，并且提高反应压力，不利于挥发分析出。但是通过动力学分析发现，一定范围内增加压力能够降低热解过程中的活化能，从而有利于热解反应的发生，但是压力超过0.7 MPa以后，活化能开始增加。2)增加升温速率，挥发分释放的越强烈，有利于热解反应的进行，但挥发分大量析出的温度范围并没有很明显的浮动。通过动力学分析发现，随着升温速率增加，反应的活化能出现减少趋势，这说明随着升温速率增加，松木屑热解反应更加激烈。3)在松木屑热解反应中添加CaO对反应过程有较大的影响。随着CaO催化剂添加量增加，松木屑最终失重率逐渐减少，从72.81%减少到59.61%，降幅达到18.13%。 DTG曲线显示失重峰增加到4个，另外两个为Ca( OH)2和CaCO3分解所引起的失重峰。随着CaO添加量的增加，第1个失重峰的峰值和第2个失重峰的峰值逐渐减小，最大峰值对应的温度点变化不明显；第3、第4个失重峰的峰值逐渐增加，最大峰值对应的温度出现明显增加趋势。
연구료불동압력、승온속솔이급첨가CaO최화제대송목설열해과정적영향병진행료동역학분석。연구결과표명：1)증가계통적반응압력회강저열해과정적최종실중솔，최종적잉여물질증가，병차제고반응압력，불리우휘발분석출。단시통과동역학분석발현，일정범위내증가압력능구강저열해과정중적활화능，종이유리우열해반응적발생，단시압력초과0.7 MPa이후，활화능개시증가。2)증가승온속솔，휘발분석방적월강렬，유리우열해반응적진행，단휘발분대량석출적온도범위병몰유흔명현적부동。통과동역학분석발현，수착승온속솔증가，반응적활화능출현감소추세，저설명수착승온속솔증가，송목설열해반응경가격렬。3)재송목설열해반응중첨가CaO대반응과정유교대적영향。수착CaO최화제첨가량증가，송목설최종실중솔축점감소，종72.81%감소도59.61%，강폭체도18.13%。 DTG곡선현시실중봉증가도4개，령외량개위Ca( OH)2화CaCO3분해소인기적실중봉。수착CaO첨가량적증가，제1개실중봉적봉치화제2개실중봉적봉치축점감소，최대봉치대응적온도점변화불명현；제3、제4개실중봉적봉치축점증가，최대봉치대응적온도출현명현증가추세。
The influences of different pressures, heating rate and addtion of CaO catalyst on pine sawdust pyrolysis process and dynamics analysis were studied. The experimental results show that:1 ) Increasing the reaction pressure will reduce eventually weight loss rate of pyrolysis process, and the final remaining material will increase, increasing the reaction pressure is not conducive to the volatile analysis. This study found that a certain range of pressure increase can reduce the activation energy of pyrolysis process, which is advantageous to the pyrolysis reaction, but after the pressure exceeds 0. 7 MPa, activation energy began to increase. 2 ) Increasing the heating rate can enhance the volatile releases, which is advantageous to the pyrolysis reaction, but a large amount of precipitation temperature rang of volatile was not obvious. It was found that with the increase of heating rate, the reaction activation energy trendth decrease. It shows that with the increase of heating rate, pine sawdust pyrolysis reaction is more intense. 3) Addition of CaO in the pine sawdust, has a larger effect on pyrolysis reaction process. With the increase of CaO catalyst additives, pine sawdust weight loss rate reduces gradually from 72. 81% to 59. 61 %. Total reduction is 18. 13 %. DTG curves show that weight loss peaks increased to four,the other two peaks are the decomposition weight loss caused by Ca( OH) 2 and CaCO3 , respectively. With the increase of addition of CaO, the first and second peaks of weight loss peak decreases gradually. The temperature corresponding to the peak point of the biggest change is not obvious. The third and fourth weight loss peaks increase gradually, and the maximum peak corresponding to the temperature appears obvious trend of increase.