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British Columbia (BC) recently released the CleanBC policy framework to promote clean energy and mitigate greenhouse gas (GHG) emissions. However, CleanBC lacks concrete measures to reverse the growth of energy demand. Although BC has rich biomass and hydroelectric resources, it remains unclear whether these renewable resources will be enough to meet future energy demand. In this work, the potential in BC for increasing production and use of bioenergy, renewable electricity, and low‐carbon hydrogen was assessed, and the most efficient measures were identified. Energy scenarios were constructed to explore BC's future renewable energy demands for meeting GHG mitigation targets. The results show that CleanBC will drastically raise renewable energy demands but fail to achieve the 2030 target without radical demand reduction. Seen as the core strategy in CleanBC, electrification will require at least 60 PJ of additional electricity supply for 2030 and 160 PJ for carbon neutrality in 2050. This implies implementing wind and solar generation in capacities comparable to massive hydroelectric projects. Alternative to electrification is the bioenergy‐centred strategy. Existing waste biomass must be fully exploited; even then, roughly 250 and 460 PJ of additional primary bioenergy will be needed for 2030 and 2050, respectively, well beyond any foreseeable waste supply within BC. Hence, it is essential to utilize all the available biomass and renewable electricity resources and promote a diversified renewable energy portfolio. Hydrogen used as an energy carrier must be produced from natural gas with carbon capture to avoid competition for the limited renewable energy resources. [ABSTRACT FROM AUTHOR]

Climate change and resource scarcity are just two of the planetary crises that make radical socio‐economic change essential if human society is to be sustainable. Chemical engineering is a skill‐set that can make a unique contribution to the socio‐economic transition, going beyond new technological processes to provide a system‐level understanding of economic activities from the perspective of industrial ecology. This paper provides an example by applying process system analysis to the use, re‐use, remanufacturing, and recycling of material products. Unlike the 'circular economy' approach, the analysis starts from the stock of goods and materials in use in the economy and models the flows required to build up, operate, and maintain the stock. Metrics are developed to account for the effect of stock growth on demand for materials. The significance of the analysis is illustrated for four metals whose industrial ecologies are at different levels of maturity: lead, copper, aluminium, and lithium. Extending product life through re‐use and remanufacturing is crucial for resource efficiency, using labour to reduce demand for energy and non‐renewable resources. If end‐of‐life products are processed to recover individual elements, the cost penalties increase rapidly with the decreasing concentration of valuable materials and increasing number of materials in the mixture. Thus, shifting from a linear economy (make−use−dispose) to closed‐loop use of materials involves rethinking product design to reduce the number of materials used. Material substitution to reduce demand for scarce materials needs to look beyond equivalence of function to consider changing patterns of use in the regenerative economy. [ABSTRACT FROM AUTHOR]

The environmental and resource crises that confront human life on earth demand changes to the whole socio‐economic metabolic system. The changes will affect all aspects of life, including the practice of chemical engineering. The historical association of the profession with the fossil carbon economy means that the expertise that makes up chemical engineering must be re‐examined and repurposed urgently if the discipline is to play a full role in the socio‐economic transition. In this article, we review the historical development of chemical engineering to identify its unique features and find ways in which it can change to meet the challenge. A pattern of 30‐year cycles in the development of the discipline is revealed, showing the way it has built up by incorporating approaches from other disciplines and also developing a unique set of skills and knowledge. Chemical engineering as taught needs to prepare graduates to operate under the kind of social contract embodied in declarations by professional bodies. We propose ways in which the expertise comprising chemical engineering can be applied in the 'just transition' to a less unsustainable society, including new approaches to plant and process design and also applications 'outside the pipe' to environmental modelling and industrial ecology. The unsustainability crisis results from a history of poor public and private decisions, so examination of the different types of decisions is timely. Specific roles for chemical engineers in deliberative decision processes are identified, including enhanced emphasis on risk and precaution. [ABSTRACT FROM AUTHOR]

John Ross Grace, one of the leading chemical engineers in Canada and an international figure in fluidization and fluid-particle systems, died in Vancouver on 26th May 2021, after a long fight with multiple system atrophy. At the same time, John and his colleagues at UBC developed a novel fluidized bed membrane reactor for hydrocarbon steam reforming for high-purity hydrogen production. As the Canada Research Chair in clean energy processes, John studied the combustion and gasification of coal and biomass in pilot fluidized bed reactors, and hydrocarbon steam reforming in pilot fluidized bed membrane reactors. [Extracted from the article]

Summary: Under some circumstances, electric vehicles (EVs) can reduce overall environmental impacts by displacing internal combustion engine vehicles (ICEVs) and by enabling more intermittent renewable energy sources (RES) by charging with surplus power in periods of low demand. However, the net effects on greenhouse gas (GHG) emissions of adding EVs into a national or regional electricity system are complex and, for a system with significant RES, are affected by the presence of storage capacity, such as pumped hydro storage (PHS). This article takes the Portuguese electricity system as a specific example, characterized by relatively high capacities of wind generation and PHS. The interactions between EVs and PHS are explored, using life cycle assessment to compare changes in GHG emissions for different scenarios with a fleet replacement model to describe the introduction of EVs. Where there is sufficient storage capacity to ensure that RES capacity is exploited without curtailment, as in Portugal, any additional demand, such as introduction of EVs, must be met by the next marginal technology. Whether this represents an average increase or decrease in GHG emissions depends on the carbon intensity of the marginal generating technology and on the fuel efficiency of the ICEVs displaced by the EVs, so that detailed analysis is needed for any specific energy system, allowing for future technological improvements. A simple way to represent these trade‐offs is proposed as a basis for supporting strategic policies on introduction of EVs. [ABSTRACT FROM AUTHOR]

The Construction sector is characterised by complex supply networks delivering unique end products over short time scales. Sustainability has increased in importance but continues to be difficult to implement in this sector; thus, new approaches and practices are needed. This paper reports an empirical investigation into the value of the UN Sustainable Development Goals (SDGs), especially Sustainable Consumption and Production (SDG12), when used as a framework for action by organisations to drive change towards sustainability in global supply networks. Through inductive research, two different and contrasting approaches to improving the sustainability of supply networks have been revealed. One approach focuses on the "bottom up" ethical approach typified by the Forest Stewardship Council (FSC) certification of timber products, and the other on "top-down" regulations exemplified by the UK Modern Slavery Act. In an industry noted for complex supply networks and characterised by adversarial relationships, the findings suggest that, in the long term, promoting shared values aligned with transparent, third-party monitoring will be more effective than imposing standards through legislation and regulation in supporting sustainable consumption and production. [ABSTRACT FROM AUTHOR]

By means of the life cycle assessment methodology, the purpose of this study is to assess the environmental impact when biomethane from organic waste produced at residential level is used to supply energy to a group of dwellings in the distributed generation paradigm. Three different Combined Heat and Power systems, such as fuel cells, Stirling engine and micro gas turbine, installed at household level are assessed in two different settings: one in Northern Europe (UK) and one in Southern Europe (Italy). Different operating strategies are investigated for each technology. Moreover, marginal electricity production technologies are analysed to assess their influence on the results. This study has demonstrated that the type of bio-methane fed micro-CHP technology employed has a significantly different environmental impact: fuel cells are the most environmentally friendly solution in every category analysed; Stirling engines, although can supply heat to the largest number of dwellings are the least environmentally friendly technology. However, key factors investigated in the model presented in this paper influence the decision making on the type of technology adopted and the operating strategy to be implemented. [ABSTRACT FROM AUTHOR]

The Planetary Boundaries (PB) framework represents a significant advance in specifying the ecological constraints on human development. However, to enable decision-makers in business and public policy to respect these constraints in strategic planning, the PB framework needs to be developed to generate practical tools. With this objective in mind, we analyse the recent literature and highlight three major scientific and technical challenges in operationalizing the PB approach in decision-making: first, identification of thresholds or boundaries with associated metrics for different geographical scales; second, the need to frame approaches to allocate fair shares in the 'safe operating space' bounded by the PBs across the value chain and; third, the need for international bodies to co-ordinate the implementation of the measures needed to respect the Planetary Boundaries. For the first two of these challenges, we consider how they might be addressed for four PBs: climate change, freshwater use, biosphere integrity and chemical pollution and other novel entities. Four key opportunities are identified: (1) development of a common system of metrics that can be applied consistently at and across different scales; (2) setting 'distance from boundary' measures that can be applied at different scales; (3) development of global, preferably open-source, databases and models; and (4) advancing understanding of the interactions between the different PBs. Addressing the scientific and technical challenges in operationalizing the planetary boundaries needs be complemented with progress in addressing the equity and ethical issues in allocating the safe operating space between companies and sectors. [ABSTRACT FROM AUTHOR]

Paper recycling may not be as good for the environment as is generally perceived. Recycling mills must be in constant operation and waste paper is being imported to meet growing demand. Recycling is effective economically, allowing paper imports to be reduced while increasing the recycler's economic activity, but environmental emissions rise and imports are transported by road which increases air pollution. Life-cycle assessments can be applied to analyse the environmental impact of paper recycling.