化工原理理论教学的改革

化工原理是一门直接服务于化工生产第一线的课程。从认识实习中发现问题,激发学习兴趣,并利用各种教学手段培养学生解决问题的方法,将复杂的理论简单化,并通过方法和过程的讲解潜移默化教会学生解决工程问题的基本方法,培养学生的工程观念和创新思维。     

化工专业高等教育模式及学生知识结构改革的探索一《化工产品设计》课程的设立

在本科化学工程专业教育中开设《化工产品设计》课程符合化工行业发展趋势,可以满足学生就业及其知识更新的需求。根据“化工产品设计》课程的特点,文章着重探讨学生能力培养、课程内容设置和教学过程模式,总结教学过程中的经验。但是,在教学过程中仍然存在问题需要解决和完善。本工作对化工高教类新课程的建设与发展方向有良好的建设意义。     

基于行业需求的化学工程与工艺专业人才培养模式

分析高等教育的改革需要,提出以行业需求为导向,改革人才培养模式。分析化工行业人才需求,结合中北大学化学工业与工艺专业的就业方向,确立人才培养目标,构建专业课程体系,搭建校企合作办学的实践教学平台。     

Carbon-free dry reforming of methane to syngas over NdCoO3 perovskite-type mixed metal oxide catalyst

CoNdO_x (Co/Nd = 1) is a highly promising catalyst for the carbon-free CO₂ reforming of methane. Influence of the Co/Nd ratio on the catalyst performance in the CO₂ reforming and also on the crystalline phases and reduction by temperature programmed reduction (TPR) of the CoNdO_x catalyst has also been investigated. The CoNdO_x (CoNd = 1.0) catalyst consisted of mainly NdCoO₃ perovskite-type mixed metal oxide and it showed not only a high resistance to carbon formation at different process conditions (viz. temperature = 750–900 °C and gas hourly space velocity (GHSV) = 10000–50000 cm³ g^–1 h^–1) but also high activity and selectivity in the CO₂ reforming process. The high resistance to carbon formation for this catalyst is attributed mostly to strong metal (Co°)–support (Nd₂O₃) interactions.     

Comparison of slow sand filtration and microfiltration as pretreatments for inland desalination via reverse osmosis

A pilot study was conducted from October 2007 to November 2010 to establish the long-term feasibility of using reverse osmosis (RO) treatment to manage salt levels in Central Arizona Project water. Pretreatments consisting of microfiltration (MF) and slow sand filtration (SSF) were compared based on performance—turbidity removal, silt density index (SDI), volume treated between cleaning events and protection of downstream RO—during side-by-side operation over a yearlong period. SSF always produced feed water that was suitable for RO treatment (SDI < 5). However, MF consistently provided filtrate with SDI < 3, and long-term RO performance improved significantly with MF as pretreatment. Although the economic costs of MF and SSF pretreatments are similar; MF is preferred based on the quality of treated water and stability of downstream RO operation.