Sensitivity analysis of a methanol and power polygeneration system fueled with coke oven gas and coal gas

The sensitivity analysis of a polygeneration energy system fueled with duo fuel of coke oven gas and coal gas is performed in the study,and the focus is put on the relations among syngas composition,conversation rate and performance.The impacts of the system configuration together with the fuel composition on the performance are investigated and discussed from the point of cascading utilization of fuel chemical energy.First,the main parameters affecting the performance are derived along with the analysis of the system configuration and the syngas composition.After the performance is being simulated by means of the Aspen Plus process simulator of version 11.1,the variation of the performance due to the composition of syngas and the conversion rate of chemical subsystem is obtained and discussed.It is obtained from the result that the proper conversion rate of the chemical subsystem according to the specific syngas composition results in better performance.And the syngas composition affects the optimal conversion rate of the chemical subsystem,the optimal point of which is around the stoichiometric composition for methanol production(CO/H_(2)=0.5).In all,the polygeneration system fueled with coke oven gas and coal gas,which can realize the reasonable conversion of syngas to power and chemical product according to the syngas composition,is a promising method for coal energy conversion and utilization.

煤-焦炉气共热解半焦燃烧动力学特性研究──燃烧模型的建立及其表观活化能动态描述

采用热重分析方法（ＴＧＡ）对煤－焦炉气共热解半焦燃烧动力学特性进行研究，建立了半焦燃烧动力学模型，采用新的数学处理方法，实现了表观活化能在半焦燃烧过程中的动态描述及平均表观活化能的求取。分析结果表明，表观活化能在半焦燃烧过程中呈“两头高、中间低”的“钟”型动态分布，其变化范围为：４７～９５ｋＪ／ｍｏｌ，其中主要燃烧失重阶段（转化率为２０％～８０％）的表观活化能较低且变化幅度较小，约为４７～６０ｋＪ／ｍｏｌ，在燃烧转化率为４０％左右出现最低活化能约４７ｋＪ／ｍｏｌ。同一半焦燃烧过程中，表观活化能与燃烧速率动态分布具有良好的对应关系，即较大燃烧速率对应着较低表观活化能。

煤热解技术现状及研究进展

介绍了国内研发的几种煤热解技术,分析了各种技术的优缺点,并简述了煤热解的机理。从热解原料和热解反应条件方面分析了各因素对煤热解过程的影响,重点分析了催化剂对热解行为的影响。从热解技术耦合方面考虑,开发新型热解技术工艺,可达到提高煤热解转化率和焦油产率的目的。

工艺条件对煤-废塑料在焦炉气气氛下共热解特性的影响

将先锋褐煤与５％聚乙烯（ＰＥ）混合加入１０ｇ固定床反应器中通入焦炉煤气在不同压力、升温速率及终态温度下共热解。结果表明，在实验压力范围内（０．１ＭＰａ～３ＭＰａ）添加废塑料可实现煤－焦炉气常压热解达到甚至超过高压（３ＭＰａ）下不加ＰＥ时热解的焦油收率，同时增加半焦收率，明显降低热解水分。降低升温速率可明显增加焦油收率，降低水分。添加废塑料还可实现煤－焦炉气低温热解达到甚至超过高温热解时的焦油收率，同时提高半焦收率减少热解水分。通过添加废塑料，煤－焦炉气共热解工艺可以进一步实现温和化高效热解。