Learning outcome Perform mass and energy balances, identify all key and utility streams and specify their flow, composition data. Use of computer based flow sheet software to perform mass and energy

balances. Make an assessment of potential hazards Make an assessment of sustainability of the plant Make a material selection for chemical engineering equipment Mark 0-5 Limited and uncomplete mass and energy balances. Calculations not given and explained. Limited or no Hysys flow sheet has been created. Poor selection of process safety aspects and no details given on how these related to the overall design. Report lacks any discussion and criticism of the process safety methods used. 0-3 A poor report, lacking logical and systematic assessment of positive and negative impacts on all three pillars of sustainability, or not assessing all three pillars. Generally incorrect or missing identification of risks and mitigations. Shows lack of understanding of lecture content. 0-3 A poor report, where only some of the mechanical, thermal and chemical demands on the 3 key units are appraised. Following a poor assessment of the materials properties necessary to meet these demands, some materials are identified for each of the 3 key units. A discussion of these materials is missing and/or selection is poor or incorrect. Shows lack of understanding of lecture 6-10 Mass and energy balances for the process with major errors or omissions. Process assumptions not given or unrealistic. 6-10 Hysys flow sheet does not include all the process units (e.g. some units not working) No comparison with manual calculations is presented. 5-8 A basic report with limited evidence of understanding of how the chosen aspects of safety relate to the design process. Some discussion of the process safety aspects is provided, but this is largely superficial and contains misconceptions. 4-6 A basic report, assessing positive and negative impacts on all three pillars of sustainability in a logical and systematic way. Some risks are mentioned, but mitigation and prioritization is incorrect or missing. Generally shows an understanding of lecture content. 4-6 A basic report, where most of the mechanical, thermal and chemical demands on the 3 key units are appraised. Following an incomplete assessment of the materials properties necessary to meet these demands, some engineering materials are identified for each of the 3 key units. A discussion of these materials leads to the selection of an appropriate one. Generally shows an understanding of lecture 11-15 Complete mass and energy balances for the whole process with some errors and omissions. 11-15 Hysys flow sheet for the whole process has been created with some errors or omissions. Some comparison with manual calculations is presented. 9-12 An acceptable report with an appropriate selection of multiple aspects of process safety. A range of potential process hazards are identified and properly considered within the context of design. Discussion and criticism of the process safety methods is provided. References are used to support discussion 7-9 An acceptable report, assessing positive and negative impacts on all three pillars of sustainability in a logical and systematic way. Good identification of risks, with evidence of prioritization and proposed mitigation. Some mention of either temporal, geographical scales, or unusual or emergency operations are present. 7-9 An acceptable report, where the mechanical, thermal and chemical demands on the 3 key units are fully appraised, with consideration of unusual or emergency operations. Following an assessment of the materials properties necessary to meet these demands, some engineering materials are identified for each of the 3 key units. A discussion of these materials leads to the selection of the most appropriate one. Quantification and referencing 16-20 Complete mass and energy balances with no obvious errors Utility are specified completely. 16-20 Hysys flow sheet has been created with minor errors. Advanced features (ie. adjustment) have been used. Detailed comparisons (with manual calculatons) and good discussion are presented. 13-16 An excellent report with a well thought out, systematic and critical review outlining how design decisions were related to the chosen process safety aspects. A clear summary of process hazards is provided with a discussion outlining the challenges and benefits, advantages and disadvantages of the methods. Report is well- referenced throughout 10-12 An excellent report, fully assessing positive and negative impacts on all three pillars of sustainability in a logical and systematic way (e.g. using the 4 P's). Important risks are identified based on a prioritisation of likelihood and impact, and sensible mitigations are proposed. Quantitative targets for improvement are provided. Examples of consideration of temporal and geographical scales, as well as unusual and emergency operations are present. 10-12 An excellent report, where the mechanical, thermal and chemical demands on the 3 key units are fully appraised, with consideration of unusual and emergency operations. Following a convincing assessment of the materials properties necessary to meet these demands, an appropriate range of engineering materials are identified for each of the 3 key units. An analytical discussion of these materials leads to the selection of the most appropriate one. Newcastle University 21-25 Complete mass and energy balances presented in a highly professional and informative format beyond expectation at this stage 21-25 Sophisticated Hysys sheet for the whole process has been created demonstrating knowledge beyond the lecture content. Detailed comparisons with excellent discussion is presented. 17-20 As before, but with additional signs of creativity and innovation beyond the lecture content. Original and inciteful discussion presented in a highly professional and informative format. 13-15 An exemplary report incorporating all points from the previous descriptor, but additionally demonstrating knowledge beyond the lecture content, and/or showing signs of engineering flair and professionalism beyond expectation at this stage. 13-15 An exemplary report incorporating all points from the previous descriptor, but additionally demonstrating knowledge beyond the lecture content, and/or showing signs of engineering flair and professionalism beyond expectation at this stage.