变压吸附空分用椰壳基炭分子筛的制备  

Preparation of coconut shell-based carbon molecular sieves for air separation by pressure swing adsorption

作　　者：李兴伟[1] 徐绍平[1] 丛媛媛[1] 

机构地区：[1]大连理工大学化工与环境生命学部,大连116024

出　　处：《工程科学学报》2017年第3期443-448,共6页Chinese Journal of Engineering

摘　　要：提出以椰壳预炭化料为骨料、酚醛树脂为黏结剂制备变压吸附空分制氮用炭分子筛的新工艺路线,包括成型、炭化、水蒸气活化、两步苯气相碳沉积调孔等主要工序;完善了炭分子筛的变压吸附空分评价手段,即以变压吸附空分为基本手段,结合变压吸附脱附尾气总量及其中O_2浓度等参数分析,准确表征炭分子筛制备过程中样品的微孔孔容和孔径变化,从而实现对炭分子筛制备工艺参数的精确控制.所得的椰壳基炭分子筛具有较高的抗压强度,其变压吸附空分性能接近商业炭分子筛产品.A novel process for preparation of a carbon molecular sieve（ CMS） was proposed. With coconut shell char as a carbon precursor and phenol formaldehyde resin（ PF） as a binder,the process consists of a series of stages,i. e.,forming,carbonization,activation with steam,and two-step chemical vapor deposition with benzene as a carbon source. The CMS has been used as an adsorbent in pressure swing adsorption（ PSA） of air for N2 production. The evaluation method of CMS based on PSA was developed by introducing a couple of analysis items including the amount of the effluent desorption gas in PSA and the O2 concentration in it. In this way,the development of the effective volume and size of the micropores of CMS during the preparation stages could be followed and controlled on purpose. The coconut shell-based CMS prepared by this method has a superior compressive strength and a comparable PSA performance to those commercial CMSs.

关 键 词：炭分子筛 变压吸附 椰壳 空气分离 

分 类 号：TQ424.1[化学工程]