Influence of clay metal minerals on the products of microwave pyrolysis of oil sludge

IF 1.6 4区 工程技术 Q3 ENGINEERING, CHEMICAL
Ruixuan Wang, Liang Shi, Shihong Hu, Xingyuan Chen, Wentao Su
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引用次数: 0

Abstract

Oil sludge is a solid organic waste generated during the extraction and transport of petroleum resources. In this paper, initially, the types of oil sludge and the potential hazards of oil sludge are discussed. On this basis, the disposal process of microwave pyrolysis of oil sludge for generating three-phase products (gas, light oil, and residual carbon) for recycling is put forward, through which the oil sludge is recycled and reused, and the pollution to the environment is decreased. To elevate the reaction rate of microwave pyrolysis of oil sludge and raise the yields of gas and liquid oil, four catalysts (montmorillonite-Ca-based, montmorillonite-Na-based, kaolinite, chlorite) were introduced to experimentally dissect the heating rate, oil production rate, and gas production rate of microwave pyrolysis. The results demonstrated that the reaction rate of microwave pyrolysis was prominently enhanced after adding the catalysts, and the contents of pyrolysis oil and pyrolysis gas also increased conspicuously. The combustible gas content in pyrolysis gas (H2 + CH4 + CO) increased by 17.624 wt.% (montmorillonite Na-based), 9.511 wt.% (chlorite), 12.28 wt.% (kaolinite), and 15.164 wt.% (montmorillonite Ca-based), respectively, compared to that of the blank group. The clay–metal mineral catalysts, particularly montmorillonite Na-based, facilitated the sludge decomposition, augmented the content of low-carbon number straight-chain hydrocarbons and alcohols, and improved the quality of pyrolysis oil products.

黏土矿物对油泥微波热解产物的影响
油泥是石油资源开采和运输过程中产生的固体有机废弃物。本文首先讨论了油泥的种类及其潜在危害。在此基础上,提出了油泥微波热解生成三相产物(气、轻油、残碳)回收利用的处置工艺,通过该工艺可使油泥回收再利用,减少对环境的污染。为提高油泥微波热解的反应速率,提高气液油收率,采用蒙脱石-钙基、蒙脱石-钠基、高岭石、绿泥石4种催化剂对微波热解的升温速率、产油速率和产气速率进行了实验研究。结果表明:添加催化剂后,微波热解的反应速率显著提高,热解油和热解气的含量也显著增加。热解气体中H2 + CH4 + CO的可燃气体含量增加了17.624 wt。%(钠基蒙脱土),9.511 wt。%(绿泥石),12.28重量。%(高岭石),15.164 wt。% (ca基蒙脱石),分别与空白组比较。粘土-金属矿物催化剂,特别是钠基蒙脱土催化剂,促进了污泥的分解,提高了低碳数直链烃和醇的含量,提高了热解油品的质量。
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来源期刊
Canadian Journal of Chemical Engineering
Canadian Journal of Chemical Engineering 工程技术-工程:化工
CiteScore
3.60
自引率
14.30%
发文量
448
审稿时长
3.2 months
期刊介绍: The Canadian Journal of Chemical Engineering (CJChE) publishes original research articles, new theoretical interpretation or experimental findings and critical reviews in the science or industrial practice of chemical and biochemical processes. Preference is given to papers having a clearly indicated scope and applicability in any of the following areas: Fluid mechanics, heat and mass transfer, multiphase flows, separations processes, thermodynamics, process systems engineering, reactors and reaction kinetics, catalysis, interfacial phenomena, electrochemical phenomena, bioengineering, minerals processing and natural products and environmental and energy engineering. Papers that merely describe or present a conventional or routine analysis of existing processes will not be considered.
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